**Item category:** Textile waste, wet

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.2, UN1857, packing group III; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Textile waste, wet 4.2 UN1857 III Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Textile waste, wet — Postal shipping restrictions by item category


**Item category:** Thallium chlorate

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 5.1, UN2573, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Thallium chlorate 5.1 UN2573 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thallium chlorate — Postal shipping restrictions by item category


**Item category:** Thallium compounds, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN1707, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Thallium compounds, n.o.s. 6.1 UN1707 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thallium compounds, n.o.s. — Postal shipping restrictions by item category


**Item category:** Thallium nitrate

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2727, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Thallium nitrate 6.1 UN2727 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thallium nitrate — Postal shipping restrictions by item category


**Item category:** Thioacetic acid

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN2436, packing group II; domestic mail air: Prohibited; domestic mail surface: 3A

> Thioacetic acid 3 UN2436 II Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thioacetic acid — Postal shipping restrictions by item category


**Item category:** Thiocarbamate pesticide, liquid, flammable, toxic, flashpoint less than 23° C

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 3, UN2772, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Thiocarbamate pesticide, liquid, flammable, toxic, flashpoint less than 23° C 3 UN2772 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thiocarbamate pesticide, liquid, flammable, toxic, flashpoint less than 23° C — Postal shipping restrictions by item category


**Item category:** Thiocarbamate pesticide, liquid, toxic

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3006, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Thiocarbamate pesticide, liquid, toxic 6.1 UN3006 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thiocarbamate pesticide, liquid, toxic — Postal shipping restrictions by item category


**Item category:** Thiocarbamate pesticides, liquid, flammable, toxic, flashpoint not less than 23° C

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3005, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Thiocarbamate pesticides, liquid, flammable, toxic, flashpoint not less than 23° C 6.1 UN3005 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thiocarbamate pesticides, liquid, flammable, toxic, flashpoint not less than 23° C — Postal shipping restrictions by item category


**Item category:** Thiocarbamate pesticides, solid, toxic

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2771, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Thiocarbamate pesticides, solid, toxic 6.1 UN2771 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thiocarbamate pesticides, solid, toxic — Postal shipping restrictions by item category


**Item category:** Thioglycolic acid

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN1940, packing group II; domestic mail air: 8A; domestic mail surface: 8A

> Thioglycolic acid 8 UN1940 II 8A 8A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thioglycolic acid — Postal shipping restrictions by item category


**Item category:** Thiogylcol

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2966, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Thiogylcol 6.1 UN2966 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thiogylcol — Postal shipping restrictions by item category


**Item category:** Thiolactic acid

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2936, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Thiolactic acid 6.1 UN2936 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thiolactic acid — Postal shipping restrictions by item category


**Item category:** Thionyl chloride

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN1836, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Thionyl chloride 8 UN1836 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thionyl chloride — Postal shipping restrictions by item category


**Item category:** Thiophene

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN2414, packing group II; domestic mail air: Prohibited; domestic mail surface: 3A

> Thiophene 3 UN2414 II Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thiophene — Postal shipping restrictions by item category


**Item category:** Thiophosgene

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2474, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Thiophosgene 6.1 UN2474 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thiophosgene — Postal shipping restrictions by item category


**Item category:** Thiophosphoryl chloride

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN1837, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Thiophosphoryl chloride 8 UN1837 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thiophosphoryl chloride — Postal shipping restrictions by item category


**Item category:** Thiourea dioxide

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.2, UN3341, packing group II, III; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Thiourea dioxide 4.2 UN3341 II, III Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Thiourea dioxide — Postal shipping restrictions by item category


**Item category:** Tinctures, medicinal

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN1293, packing group II, III; domestic mail air: Prohibited; domestic mail surface: 3A

> Tinctures, medicinal 3 UN1293 II, III Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Tinctures, medicinal — Postal shipping restrictions by item category


**Item category:** Titanium disulphide

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.2, UN3174, packing group III; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Titanium disulphide 4.2 UN3174 III Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Titanium disulphide — Postal shipping restrictions by item category


**Item category:** Titanium hydride

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.1, UN1871, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Titanium hydride 4.1 UN1871 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Titanium hydride — Postal shipping restrictions by item category


**Item category:** Titanium powder, dry

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.2, UN2546, packing group I, II, III; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Titanium powder, dry 4.2 UN2546 I, II, III Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Titanium powder, dry — Postal shipping restrictions by item category


**Item category:** Titanium powder, wetted with not less than 25 percent water (a visible excess of water must be present) (a) mechanically produced, particle size less than 53 microns; (b) chemically produced, particle size less than 840 microns

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.1, UN1352, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Titanium powder, wetted with not less than 25 percent water (a visible excess of water must be present) (a) mechanically produced, particle size less than 53 microns; (b) chemically produced, particle size less than 840 microns 4.1 UN1352 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Titanium powder, wetted with not less than 25 percent water (a visible excess of water must be present) (a) mechanically produced, particle size less than 53 microns; (b) chemically produced, particle size less than 840 microns — Postal shipping restrictions by item category


**Item category:** Titanium sponge granules or Titanium sponge powders

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.1, UN2878, packing group III; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Titanium sponge granules or Titanium sponge powders 4.1 UN2878 III Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Titanium sponge granules or Titanium sponge powders — Postal shipping restrictions by item category


**Item category:** Titanium tetrachloride

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN1838, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Titanium tetrachloride 8 UN1838 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Titanium tetrachloride — Postal shipping restrictions by item category


**Item category:** Titanium trichloride mixtures

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN2869, packing group II, III; domestic mail air: 8A; domestic mail surface: 8A

> Titanium trichloride mixtures 8 UN2869 II, III 8A 8A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Titanium trichloride mixtures — Postal shipping restrictions by item category


**Item category:** Titanium trichloride, pryophoric or Titanium trichloride mixtures, pyrophoric

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.2, UN2441, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Titanium trichloride, pryophoric or Titanium trichloride mixtures, pyrophoric 4.2 UN2441 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Titanium trichloride, pryophoric or Titanium trichloride mixtures, pyrophoric — Postal shipping restrictions by item category


**Item category:** Toluene diisocyanate

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2078, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toluene diisocyanate 6.1 UN2078 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toluene diisocyanate — Postal shipping restrictions by item category


**Item category:** Toluidines solid

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3451, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toluidines solid 6.1 UN3451 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toluidines solid — Postal shipping restrictions by item category


**Item category:** Torpedoes, liquid fueled, with inert head

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.3J, UN0450, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Torpedoes, liquid fueled, with inert head 1.3J UN0450 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Torpedoes, liquid fueled, with inert head — Postal shipping restrictions by item category


**Item category:** Torpedoes, liquid fueled, with or without bursting charge

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1J, UN0449, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Torpedoes, liquid fueled, with or without bursting charge 1.1J UN0449 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Torpedoes, liquid fueled, with or without bursting charge — Postal shipping restrictions by item category


**Item category:** Torpedoes with bursting charge

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0451, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Torpedoes with bursting charge 1.1D UN0451 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Torpedoes with bursting charge — Postal shipping restrictions by item category


**Item category:** Toxic by inhalation liquid, corrosive, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3390, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic by inhalation liquid, corrosive, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 6.1 UN3390 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic by inhalation liquid, corrosive, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 — Postal shipping restrictions by item category


**Item category:** Toxic by inhalation liquid, corrosive, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3389, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic by inhalation liquid, corrosive, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 6.1 UN3389 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic by inhalation liquid, corrosive, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 — Postal shipping restrictions by item category


**Item category:** Toxic by inhalation  liquid, flammable, corrosive, n.o.s. with an LC50 lower than or equal to 1000 ml/ m3 and saturated vapor concentration greater than or equal to 10 LC50

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3489, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic by inhalation liquid, flammable, corrosive, n.o.s. with an LC50 lower than or equal to 1000 ml/ m3 and saturated vapor concentration greater than or equal to 10 LC50 6.1 UN3489 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic by inhalation  liquid, flammable, corrosive, n.o.s. with an LC50 lower than or equal to 1000 ml/ m3 and saturated vapor concentration greater than or equal to 10 LC50 — Postal shipping restrictions by item category


**Item category:** Toxic by inhalation liquid, flammable, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3384, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic by inhalation liquid, flammable, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 6.1 UN3384 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic by inhalation liquid, flammable, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 — Postal shipping restrictions by item category


**Item category:** Toxic by inhalation liquid, flammable, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3383, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic by inhalation liquid, flammable, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 6.1 UN3383 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic by inhalation liquid, flammable, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 — Postal shipping restrictions by item category


**Item category:** Toxic by inhalation liquid, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3382, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic by inhalation liquid, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 6.1 UN3382 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic by inhalation liquid, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 — Postal shipping restrictions by item category


**Item category:** Toxic by inhalation liquid, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3381, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic by inhalation liquid, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 6.1 UN3381 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic by inhalation liquid, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 — Postal shipping restrictions by item category


**Item category:** Toxic by inhalation liquid, oxidizing, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3388, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic by inhalation liquid, oxidizing, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 6.1 UN3388 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic by inhalation liquid, oxidizing, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 — Postal shipping restrictions by item category


**Item category:** Toxic by inhalation liquid, oxidizing, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3387, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic by inhalation liquid, oxidizing, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 6.1 UN3387 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic by inhalation liquid, oxidizing, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 — Postal shipping restrictions by item category


**Item category:** Toxic by inhalation liquid, water- reactive, flammable, n.o.s. with an LC50 lower than or equal to 1000 ml/ m3 and saturated vapor concentration greater than or equal to 10 LC50-

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3491, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic by inhalation liquid, water- reactive, flammable, n.o.s. with an LC50 lower than or equal to 1000 ml/ m3 and saturated vapor concentration greater than or equal to 10 LC50- 6.1 UN3491 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic by inhalation liquid, water- reactive, flammable, n.o.s. with an LC50 lower than or equal to 1000 ml/ m3 and saturated vapor concentration greater than or equal to 10 LC50- — Postal shipping restrictions by item category


**Item category:** Toxic by inhalation liquid, water- reactive, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3386, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic by inhalation liquid, water- reactive, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 6.1 UN3386 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic by inhalation liquid, water- reactive, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 — Postal shipping restrictions by item category


**Item category:** Toxic gases (Division 2.3)

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** all mail

**Conditions:** All Division 2.3 toxic gases are prohibited from mailing

> Toxic Gases: All Division 2.3 toxic gases are prohibited from mailing.

Source: <https://pe.usps.com/text/pub52/pub52c3_021.htm>

Toxic gases (Division 2.3) — Postal shipping restrictions by item category


**Item category:** Toxic liquid, corrosive, inorganic, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3289, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic liquid, corrosive, inorganic, n.o.s. 6.1 UN3289 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic liquid, corrosive, inorganic, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toxic liquid, inorganic, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3287, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic liquid, inorganic, n.o.s. 6.1 UN3287 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic liquid, inorganic, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toxic liquids, corrosive, organic, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2927, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic liquids, corrosive, organic, n.o.s. 6.1 UN2927 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic liquids, corrosive, organic, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toxic liquids, flammable, organic, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2929, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic liquids, flammable, organic, n.o.s. 6.1 UN2929 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic liquids, flammable, organic, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toxic, liquids, organic, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2810, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic, liquids, organic, n.o.s. 6.1 UN2810 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic, liquids, organic, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toxic liquids, oxidizing, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3122, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic liquids, oxidizing, n.o.s. 6.1 UN3122 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic liquids, oxidizing, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toxic liquids, water-reactive, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3123, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic liquids, water-reactive, n.o.s. 6.1 UN3123 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic liquids, water-reactive, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toxic solid, corrosive, inorganic, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3290, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic solid, corrosive, inorganic, n.o.s. 6.1 UN3290 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic solid, corrosive, inorganic, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toxic solid, inorganic, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3288, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic solid, inorganic, n.o.s. 6.1 UN3288 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic solid, inorganic, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toxic solids, corrosive, organic, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2928, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic solids, corrosive, organic, n.o.s. 6.1 UN2928 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic solids, corrosive, organic, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toxic solids, flammable, organic, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2930, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic solids, flammable, organic, n.o.s. 6.1 UN2930 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic solids, flammable, organic, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toxic solids, organic, n.o.s

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2811, packing group III; domestic mail air: 6A; domestic mail surface: 6A

> Toxic solids, organic, n.o.s 6.1 UN2811 III 6A 6A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic solids, organic, n.o.s — Postal shipping restrictions by item category


**Item category:** Toxic solids, oxidizing, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3086, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic solids, oxidizing, n.o.s. 6.1 UN3086 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic solids, oxidizing, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toxic solids, self-heating, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3124, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic solids, self-heating, n.o.s. 6.1 UN3124 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic solids, self-heating, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toxic solids, water-reactive, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3125, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxic solids, water-reactive, n.o.s. 6.1 UN3125 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxic solids, water-reactive, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toxic substances with LD50 oral toxicity greater than 5 mg/kg but no more than 50 mg/kg

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail

**Conditions:** Mailable only when sent between authorized parties (manufacturers, dealers, bona fide research labs, or government employees for official use); for domestic air a Shipper's Declaration for Dangerous Goods is required

> Toxic Substances with LD 50 Oral Toxicity of 50 mg/kg or Less: Division 6.1 toxic substances having LD 50 for oral toxicity greater than 5 mg/kg but less than or equal to 50 mg/kg are mailable only when sent between authorized parties under specified conditions

Source: <https://pe.usps.com/text/pub52/pub52c3_025.htm>

Toxic substances with LD50 oral toxicity greater than 5 mg/kg but no more than 50 mg/kg — Postal shipping restrictions by item category


**Item category:** Toxins, extracted from living sources, liquid, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3172, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxins, extracted from living sources, liquid, n.o.s. 6.1 UN3172 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxins, extracted from living sources, liquid, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toxins, extracted from living sources, solid, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3462, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toxins, extracted from living sources, solid, n.o.s. 6.1 UN3462 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toxins, extracted from living sources, solid, n.o.s. — Postal shipping restrictions by item category


**Item category:** Toy caps

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.4S, NA0337, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Toy caps 1.4S NA0337 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Toy caps — Postal shipping restrictions by item category


**Item category:** Toy Propellant Devices (UN0454 or NA0323, Division 1.4S)

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail via surface transportation only

**Conditions:** Mailable via surface transportation with prior written permission from director, Product Classification; must meet strict requirements on size, design, and packaging; shipping paper required

> Toy Propellant Devices (e.g., model rocket motors or igniters) (UN0454 or NA0323): Classified as Division 1.4S, these devices may be mailed via surface transportation with prior written permission from the director, Product Classification

Source: <https://pe.usps.com/text/pub52/pub52c3_020.htm>

Toy Propellant Devices (UN0454 or NA0323, Division 1.4S) — Postal shipping restrictions by item category


**Item category:** Tracers for ammunition

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.3G, UN0212, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Tracers for ammunition 1.3G UN0212 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Tracers for ammunition — Postal shipping restrictions by item category


**Item category:** Triallyl borate

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2609, packing group III; domestic mail air: 6A; domestic mail surface: 6A

> Triallyl borate 6.1 UN2609 III 6A 6A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Triallyl borate — Postal shipping restrictions by item category


**Item category:** Triallylamine

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 3, UN2610, packing group III; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Triallylamine 3 UN2610 III Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Triallylamine — Postal shipping restrictions by item category


**Item category:** Triazine pesticides, liquid, flammable, toxic, flashpoint less than 23° C

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 3, UN2764, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Triazine pesticides, liquid, flammable, toxic, flashpoint less than 23° C 3 UN2764 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Triazine pesticides, liquid, flammable, toxic, flashpoint less than 23° C — Postal shipping restrictions by item category


**Item category:** Triazine pesticides, liquid, toxic, flammable, flashpoint not less than 23° C

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2997, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Triazine pesticides, liquid, toxic, flammable, flashpoint not less than 23° C 6.1 UN2997 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Triazine pesticides, liquid, toxic, flammable, flashpoint not less than 23° C — Postal shipping restrictions by item category


**Item category:** Triazine pesticides, liquid, toxic

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2998, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Triazine pesticides, liquid, toxic 6.1 UN2998 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Triazine pesticides, liquid, toxic — Postal shipping restrictions by item category


**Item category:** Triazine pesticides, solid, toxic

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2763, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Triazine pesticides, solid, toxic 6.1 UN2763 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Triazine pesticides, solid, toxic — Postal shipping restrictions by item category


**Item category:** Tributylamine

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2542, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Tributylamine 6.1 UN2542 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Tributylamine — Postal shipping restrictions by item category


**Item category:** Tributylphosphane

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.2, UN3254, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Tributylphosphane 4.2 UN3254 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Tributylphosphane — Postal shipping restrictions by item category


**Item category:** Trichlorbenzenes, liquid

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2321, packing group III; domestic mail air: 6A; domestic mail surface: 6A

> Trichlorbenzenes, liquid 6.1 UN2321 III 6A 6A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trichlorbenzenes, liquid — Postal shipping restrictions by item category


**Item category:** Trichloroacetic acid, solution

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN2564, packing group II, III; domestic mail air: 8A; domestic mail surface: 8A

> Trichloroacetic acid, solution 8 UN2564 II, III 8A 8A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trichloroacetic acid, solution — Postal shipping restrictions by item category


**Item category:** Trichloroacetic acid

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN1839, packing group II; domestic mail air: 8A; domestic mail surface: 8A

> Trichloroacetic acid 8 UN1839 II 8A 8A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trichloroacetic acid — Postal shipping restrictions by item category


**Item category:** Trichloroacetyl chloride

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN2442, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trichloroacetyl chloride 8 UN2442 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trichloroacetyl chloride — Postal shipping restrictions by item category


**Item category:** Trichlorobutene

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2322, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trichlorobutene 6.1 UN2322 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trichlorobutene — Postal shipping restrictions by item category


**Item category:** Trichloroethylene

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN1710, packing group III; domestic mail air: 6A; domestic mail surface: 6A

> Trichloroethylene 6.1 UN1710 III 6A 6A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trichloroethylene — Postal shipping restrictions by item category


**Item category:** Trichloroisocyanuric acid, dry

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 5.1, UN2468, packing group II; domestic mail air: 5A; domestic mail surface: 5A

> Trichloroisocyanuric acid, dry 5.1 UN2468 II 5A 5A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trichloroisocyanuric acid, dry — Postal shipping restrictions by item category


**Item category:** Trichloromethyl perchlorate

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Listed as Forbidden in the Pub 52 Appendix A mailability guide; Prohibited in domestic mail by air and by surface.

> Trichloromethyl perchlorate Forbidden Prohibited Prohibited Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trichloromethyl perchlorate — Postal shipping restrictions by item category


**Item category:** Trichlorosilane

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.3, UN1295, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trichlorosilane 4.3 UN1295 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trichlorosilane — Postal shipping restrictions by item category


**Item category:** Tricresyl phosphate with more than 3 percent ortho isomer

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2574, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Tricresyl phosphate with more than 3 percent ortho isomer 6.1 UN2574 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Tricresyl phosphate with more than 3 percent ortho isomer — Postal shipping restrictions by item category


**Item category:** Triethyl phosphite

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN2323, packing group III; domestic mail air: Prohibited; domestic mail surface: 3A

> Triethyl phosphite 3 UN2323 III Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Triethyl phosphite — Postal shipping restrictions by item category


**Item category:** Triethylamine

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 3, UN1296, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Triethylamine 3 UN1296 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Triethylamine — Postal shipping restrictions by item category


**Item category:** Triethylenetetramine

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN2259, packing group II; domestic mail air: 8A; domestic mail surface: 8A

> Triethylenetetramine 8 UN2259 II 8A 8A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Triethylenetetramine — Postal shipping restrictions by item category


**Item category:** Trifluoroacetic acid

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN2699, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trifluoroacetic acid 8 UN2699 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trifluoroacetic acid — Postal shipping restrictions by item category


**Item category:** Trifluoroacetyl chloride

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 2.3, UN3057, packing group n/a; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trifluoroacetyl chloride 2.3 UN3057 n/a Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trifluoroacetyl chloride — Postal shipping restrictions by item category


**Item category:** Trifluorochloroethylene, stabilized

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 2.3, UN1082, packing group n/a; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trifluorochloroethylene, stabilized 2.3 UN1082 n/a Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trifluorochloroethylene, stabilized — Postal shipping restrictions by item category


**Item category:** Trifluoromethane or Refrigerant gas R 23

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 2.2, UN1984, packing group n/a; domestic mail air: 2B; domestic mail surface: 2B

> Trifluoromethane or Refrigerant gas R 23 2.2 UN1984 n/a 2B 2B

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trifluoromethane or Refrigerant gas R 23 — Postal shipping restrictions by item category


**Item category:** Trifluoromethane, refrigerated liquid

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 2.2, UN3136, packing group n/a; domestic mail air: 2B; domestic mail surface: 2B

> Trifluoromethane, refrigerated liquid 2.2 UN3136 n/a 2B 2B

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trifluoromethane, refrigerated liquid — Postal shipping restrictions by item category


**Item category:** Triformoxime trinitrate

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Listed as Forbidden in the Pub 52 Appendix A mailability guide; Prohibited in domestic mail by air and by surface.

> Triformoxime trinitrate Forbidden Prohibited Prohibited Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Triformoxime trinitrate — Postal shipping restrictions by item category


**Item category:** Triisobutylene

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN2324, packing group III; domestic mail air: Prohibited; domestic mail surface: 3A

> Triisobutylene 3 UN2324 III Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Triisobutylene — Postal shipping restrictions by item category


**Item category:** Triisopropyl borate

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN2616, packing group II, III; domestic mail air: Prohibited; domestic mail surface: 3A

> Triisopropyl borate 3 UN2616 II, III Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Triisopropyl borate — Postal shipping restrictions by item category


**Item category:** Trimethoxysilane

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, NA9269, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trimethoxysilane 6.1 NA9269 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trimethoxysilane — Postal shipping restrictions by item category


**Item category:** Trimethyl borate

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN2416, packing group II; domestic mail air: Prohibited; domestic mail surface: 3A

> Trimethyl borate 3 UN2416 II Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trimethyl borate — Postal shipping restrictions by item category


**Item category:** Trimethyl phosphite

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN2329, packing group III; domestic mail air: Prohibited; domestic mail surface: 3A

> Trimethyl phosphite 3 UN2329 III Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trimethyl phosphite — Postal shipping restrictions by item category


**Item category:** Trimethylacetyl chloride

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2438, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trimethylacetyl chloride 6.1 UN2438 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trimethylacetyl chloride — Postal shipping restrictions by item category


**Item category:** Trimethylamine, anhydrous

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 2.1, UN1083, packing group n/a; domestic mail air: Prohibited; domestic mail surface: 2A

> Trimethylamine, anhydrous 2.1 UN1083 n/a Prohibited 2A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trimethylamine, anhydrous — Postal shipping restrictions by item category


**Item category:** Trimethylamine, aqueous solutions with not more than 50 percent trimethylamine by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 3, UN1297, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trimethylamine, aqueous solutions with not more than 50 percent trimethylamine by mass 3 UN1297 I, II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trimethylamine, aqueous solutions with not more than 50 percent trimethylamine by mass — Postal shipping restrictions by item category


**Item category:** Trimethylchlorosilane

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 3, UN1298, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trimethylchlorosilane 3 UN1298 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trimethylchlorosilane — Postal shipping restrictions by item category


**Item category:** Trimethylcyclohexylamine

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN2326, packing group III; domestic mail air: 8A; domestic mail surface: 8A

> Trimethylcyclohexylamine 8 UN2326 III 8A 8A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trimethylcyclohexylamine — Postal shipping restrictions by item category


**Item category:** Trimethylene glycol diperchlorate

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Listed as Forbidden in the Pub 52 Appendix A mailability guide; Prohibited in domestic mail by air and by surface.

> Trimethylene glycol diperchlorate Forbidden Prohibited Prohibited Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trimethylene glycol diperchlorate — Postal shipping restrictions by item category


**Item category:** Trimethylhexamethylene diisocyanate

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2328, packing group III; domestic mail air: 6A; domestic mail surface: 6A

> Trimethylhexamethylene diisocyanate 6.1 UN2328 III 6A 6A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trimethylhexamethylene diisocyanate — Postal shipping restrictions by item category


**Item category:** Trimethylhexamethylenediamines

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN2327, packing group III; domestic mail air: 8A; domestic mail surface: 8A

> Trimethylhexamethylenediamines 8 UN2327 III 8A 8A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trimethylhexamethylenediamines — Postal shipping restrictions by item category


**Item category:** Trimethylol nitromethane trinitrate

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Listed as Forbidden in the Pub 52 Appendix A mailability guide; Prohibited in domestic mail by air and by surface.

> Trimethylol nitromethane trinitrate Forbidden Prohibited Prohibited Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trimethylol nitromethane trinitrate — Postal shipping restrictions by item category


**Item category:** Trinitro-m-cresol

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0216, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitro-m-cresol 1.1D UN0216 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitro-m-cresol — Postal shipping restrictions by item category


**Item category:** Trinitroacetic acid

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Listed as Forbidden in the Pub 52 Appendix A mailability guide; Prohibited in domestic mail by air and by surface.

> Trinitroacetic acid Forbidden Prohibited Prohibited Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitroacetic acid — Postal shipping restrictions by item category


**Item category:** Trinitroacetonitrile

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Listed as Forbidden in the Pub 52 Appendix A mailability guide; Prohibited in domestic mail by air and by surface.

> Trinitroacetonitrile Forbidden Prohibited Prohibited Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitroacetonitrile — Postal shipping restrictions by item category


**Item category:** Trinitroamine cobalt

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Listed as Forbidden in the Pub 52 Appendix A mailability guide; Prohibited in domestic mail by air and by surface.

> Trinitroamine cobalt Forbidden Prohibited Prohibited Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitroamine cobalt — Postal shipping restrictions by item category


**Item category:** Trinitroaniline or Picramide

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0153, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitroaniline or Picramide 1.1D UN0153 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitroaniline or Picramide — Postal shipping restrictions by item category


**Item category:** Trinitroanisole

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0213, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitroanisole 1.1D UN0213 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitroanisole — Postal shipping restrictions by item category


**Item category:** Trinitrobenzene, dry or wetted with less than 30 percent water, by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0214, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrobenzene, dry or wetted with less than 30 percent water, by mass 1.1D UN0214 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrobenzene, dry or wetted with less than 30 percent water, by mass — Postal shipping restrictions by item category


**Item category:** Trinitrobenzene, wetted, with not less than 10 percent water, by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.1, UN3367, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrobenzene, wetted, with not less than 10 percent water, by mass 4.1 UN3367 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrobenzene, wetted, with not less than 10 percent water, by mass — Postal shipping restrictions by item category


**Item category:** Trinitrobenzenesulfonic acid

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0386, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrobenzenesulfonic acid 1.1D UN0386 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrobenzenesulfonic acid — Postal shipping restrictions by item category


**Item category:** Trinitrobenzoic acid, dry or wetted with less than 30 percent water, by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0215, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrobenzoic acid, dry or wetted with less than 30 percent water, by mass 1.1D UN0215 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrobenzoic acid, dry or wetted with less than 30 percent water, by mass — Postal shipping restrictions by item category


**Item category:** Trinitrobenzoic acid, wetted with not less than 10 percent water, by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.4, UN3368, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrobenzoic acid, wetted with not less than 10 percent water, by mass 4.4 UN3368 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrobenzoic acid, wetted with not less than 10 percent water, by mass — Postal shipping restrictions by item category


**Item category:** Trinitrobenzoic acid, wetted with not less than 30 percent water, by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.1, UN1355, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrobenzoic acid, wetted with not less than 30 percent water, by mass 4.1 UN1355 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrobenzoic acid, wetted with not less than 30 percent water, by mass — Postal shipping restrictions by item category


**Item category:** Trinitrochlorobenzene or Picryl chloride

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0155, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrochlorobenzene or Picryl chloride 1.1D UN0155 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrochlorobenzene or Picryl chloride — Postal shipping restrictions by item category


**Item category:** Trinitrochlorobenzene (picryl chloride), wetted, with not less than 10 percent water by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.1, UN3365, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrochlorobenzene (picryl chloride), wetted, with not less than 10 percent water by mass 4.1 UN3365 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrochlorobenzene (picryl chloride), wetted, with not less than 10 percent water by mass — Postal shipping restrictions by item category


**Item category:** Trinitroethanol

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Listed as Forbidden in the Pub 52 Appendix A mailability guide; Prohibited in domestic mail by air and by surface.

> Trinitroethanol Forbidden Prohibited Prohibited Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitroethanol — Postal shipping restrictions by item category


**Item category:** Trinitroethylnitrate

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Listed as Forbidden in the Pub 52 Appendix A mailability guide; Prohibited in domestic mail by air and by surface.

> Trinitroethylnitrate Forbidden Prohibited Prohibited Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitroethylnitrate — Postal shipping restrictions by item category


**Item category:** Trinitrofluorenone

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0387, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrofluorenone 1.1D UN0387 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrofluorenone — Postal shipping restrictions by item category


**Item category:** Trinitromethane

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Listed as Forbidden in the Pub 52 Appendix A mailability guide; Prohibited in domestic mail by air and by surface.

> Prohibited Trinitromethane

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitromethane — Postal shipping restrictions by item category


**Item category:** Trinitronaphthalene

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0217, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitronaphthalene 1.1D UN0217 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitronaphthalene — Postal shipping restrictions by item category


**Item category:** Trinitrophenetole

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0218, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrophenetole 1.1D UN0218 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrophenetole — Postal shipping restrictions by item category


**Item category:** Trinitrophenol or Picric acid, dry or wetted with less than 30 percent water, by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0154, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrophenol or Picric acid, dry or wetted with less than 30 percent water, by mass 1.1D UN0154 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrophenol or Picric acid, dry or wetted with less than 30 percent water, by mass — Postal shipping restrictions by item category


**Item category:** Trinitrophenol (picric acid), wetted with not less than 10 percent water by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.1, UN3364, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrophenol (picric acid), wetted with not less than 10 percent water by mass 4.1 UN3364 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrophenol (picric acid), wetted with not less than 10 percent water by mass — Postal shipping restrictions by item category


**Item category:** Trinitrophenol, wetted with not less than 30 percent water, by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.1, UN1344, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrophenol, wetted with not less than 30 percent water, by mass 4.1 UN1344 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrophenol, wetted with not less than 30 percent water, by mass — Postal shipping restrictions by item category


**Item category:** Trinitrophenylmethylnitramine or Tetryl

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0208, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrophenylmethylnitramine or Tetryl 1.1D UN0208 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrophenylmethylnitramine or Tetryl — Postal shipping restrictions by item category


**Item category:** Trinitroresorcinol or Styphnic acid, dry or wetted with less than 20 percent water, or mixture of alcohol and water, by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0219, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitroresorcinol or Styphnic acid, dry or wetted with less than 20 percent water, or mixture of alcohol and water, by mass 1.1D UN0219 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitroresorcinol or Styphnic acid, dry or wetted with less than 20 percent water, or mixture of alcohol and water, by mass — Postal shipping restrictions by item category


**Item category:** Trinitroresorcinol, wetted or Styphnic acid, wetted with not less than 20 percent water, or mixture of alcohol and water, by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0394, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitroresorcinol, wetted or Styphnic acid, wetted with not less than 20 percent water, or mixture of alcohol and water, by mass 1.1D UN0394 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitroresorcinol, wetted or Styphnic acid, wetted with not less than 20 percent water, or mixture of alcohol and water, by mass — Postal shipping restrictions by item category


**Item category:** Trinitrotetramine cobalt nitrate

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Listed as Forbidden in the Pub 52 Appendix A mailability guide; Prohibited in domestic mail by air and by surface.

> Trinitrotetramine cobalt nitrate Forbidden Prohibited Prohibited Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrotetramine cobalt nitrate — Postal shipping restrictions by item category


**Item category:** Trinitrotoluene and Trinitrobenzene mixtures or TNT and trinitrobenzene mixtures or TNT and hexanitrostilbene mixtures or Trinitrotoluene and hexanitrostilbene mixtures

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0388, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrotoluene and Trinitrobenzene mixtures or TNT and trinitrobenzene mixtures or TNT and hexanitrostilbene mixtures or Trinitrotoluene and hexanitrostilbene mixtures 1.1D UN0388 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrotoluene and Trinitrobenzene mixtures or TNT and trinitrobenzene mixtures or TNT and hexanitrostilbene mixtures or Trinitrotoluene and hexanitrostilbene mixtures — Postal shipping restrictions by item category


**Item category:** Trinitrotoluene mixtures containing Trinitrobenzene and Hexanitrostilbene or TNT mixtures containing trinitrobenzene and hexanitrostilbene

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0389, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrotoluene mixtures containing Trinitrobenzene and Hexanitrostilbene or TNT mixtures containing trinitrobenzene and hexanitrostilbene 1.1D UN0389 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrotoluene mixtures containing Trinitrobenzene and Hexanitrostilbene or TNT mixtures containing trinitrobenzene and hexanitrostilbene — Postal shipping restrictions by item category


**Item category:** Trinitrotoluene or TNT, dry or wetted with less than 30 percent water, by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0209, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrotoluene or TNT, dry or wetted with less than 30 percent water, by mass 1.1D UN0209 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrotoluene or TNT, dry or wetted with less than 30 percent water, by mass — Postal shipping restrictions by item category


**Item category:** Trinitrotoluene (TNT) wetted, with not less than 10 percent water by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.1, UN3366, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrotoluene (TNT) wetted, with not less than 10 percent water by mass 4.1 UN3366 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrotoluene (TNT) wetted, with not less than 10 percent water by mass — Postal shipping restrictions by item category


**Item category:** Trinitrotoluene wetted with not less than 30 percent water, by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.1, UN1356, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Trinitrotoluene wetted with not less than 30 percent water, by mass 4.1 UN1356 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Trinitrotoluene wetted with not less than 30 percent water, by mass — Postal shipping restrictions by item category


**Item category:** Tripropylamine

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN2260, packing group III; domestic mail air: Prohibited; domestic mail surface: 3A

> Tripropylamine 3 UN2260 III Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Tripropylamine — Postal shipping restrictions by item category


**Item category:** Tripropylene

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN2057, packing group II, III; domestic mail air: Prohibited; domestic mail surface: 3A

> Tripropylene 3 UN2057 II, III Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Tripropylene — Postal shipping restrictions by item category


**Item category:** Tris-(1-aziridinyl)phosphine oxide, solution

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2501, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Tris-(1-aziridinyl)phosphine oxide, solution 6.1 UN2501 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Tris-(1-aziridinyl)phosphine oxide, solution — Postal shipping restrictions by item category


**Item category:** Tris, bis-bifluoroamino diethoxy propane (TVOPA)

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Listed as Forbidden in the Pub 52 Appendix A mailability guide; Prohibited in domestic mail by air and by surface.

> Tris, bis-bifluoroamino diethoxy propane (TVOPA) Forbidden Prohibited Prohibited Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Tris, bis-bifluoroamino diethoxy propane (TVOPA) — Postal shipping restrictions by item category


**Item category:** Tritonal

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0390, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Tritonal 1.1D UN0390 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Tritonal — Postal shipping restrictions by item category


**Item category:** Tungsten hexafluoride

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 2.3, UN2196, packing group n/a; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Tungsten hexafluoride 2.3 UN2196 n/a Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Tungsten hexafluoride — Postal shipping restrictions by item category


**Item category:** Turpentine substitute

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 3, UN1300, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Turpentine substitute 3 UN1300 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Turpentine substitute — Postal shipping restrictions by item category


**Item category:** Turpentine

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN1299, packing group III; domestic mail air: Prohibited; domestic mail surface: 3A

> Turpentine 3 UN1299 III Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Turpentine — Postal shipping restrictions by item category


**Item category:** UN0328; UN0339) Ammunition, tear-producing, nonexplosive, without burster or expelling charge, non-fuzed

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2017, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> UN0328; UN0339) Ammunition, tear-producing, nonexplosive, without burster or expelling charge, non-fuzed 6.1 UN2017 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

UN0328; UN0339) Ammunition, tear-producing, nonexplosive, without burster or expelling charge, non-fuzed — Postal shipping restrictions by item category


**Item category:** Undecane

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN2330, packing group III; domestic mail air: Prohibited; domestic mail surface: 3A

> Undecane 3 UN2330 III Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Undecane — Postal shipping restrictions by item category


**Item category:** Urea hydrogen peroxide

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 5.1, UN1511, packing group III; domestic mail air: 5A; domestic mail surface: 5A

> Urea hydrogen peroxide 5.1 UN1511 III 5A 5A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Urea hydrogen peroxide — Postal shipping restrictions by item category


**Item category:** Urea nitrate, dry or wetted with less than 20 percent water, by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0220, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Urea nitrate, dry or wetted with less than 20 percent water, by mass 1.1D UN0220 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Urea nitrate, dry or wetted with less than 20 percent water, by mass — Postal shipping restrictions by item category


**Item category:** Urea nitrate, wetted with not less than 10 percent water, by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.1, UN3370, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Urea nitrate, wetted with not less than 10 percent water, by mass 4.1 UN3370 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Urea nitrate, wetted with not less than 10 percent water, by mass — Postal shipping restrictions by item category


**Item category:** Urea nitrate, wetted with not less than 20 percent water, by mass

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.1, UN1357, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Urea nitrate, wetted with not less than 20 percent water, by mass 4.1 UN1357 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Urea nitrate, wetted with not less than 20 percent water, by mass — Postal shipping restrictions by item category


**Item category:** Used, damaged, or defective electronic devices

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** international mail and domestic air transportation

**Conditions:** Prohibited from international mail and domestic air transportation; exceptions for new devices in original packaging or manufacturer-certified new/refurbished devices; surface transport must mark with 'Restricted Electronic Device' and 'Surface Transportation Only'

> Used, Damaged, or Defective Electronic Devices: Used, damaged, or defective electronic devices in international mail or domestic air transportation, except for new devices in original packaging or manufacturer-certified new or refurbished devices.

Source: <https://pe.usps.com/text/pub52/pub52c3_028.htm>

Used, damaged, or defective electronic devices — Postal shipping restrictions by item category


**Item category:** Used health care products (not suspected to contain Category A)

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail via Priority Mail or Priority Mail Express only

**Conditions:** Mailable with Priority Mail or Priority Mail Express when being returned to manufacturer or manufacturer's designee; must meet specific packaging requirements

> a used health care product not suspected to contain an infectious material, or that is known or suspected to contain a Category B infectious substance and is being returned to the manufacturer or manufacturer‘s designee, is mailable with Priority Mail or Priority Mail Express

Source: <https://pe.usps.com/text/pub52/pub52c3_025.htm>

Used health care products (not suspected to contain Category A) — Postal shipping restrictions by item category


**Item category:** Used healthcare products containing Category A infectious substance

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** all mail

**Conditions:** Used healthcare products containing a Category A infectious substance are nonmailable

> Used Healthcare Products: Used healthcare products containing a Category A infectious substance.

Source: <https://pe.usps.com/text/pub52/pub52c3_025.htm>

Used healthcare products containing Category A infectious substance — Postal shipping restrictions by item category

carrier, conditions, item_category, restriction_type, scope


**Item category:** Valeraldehyde

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN2058, packing group II; domestic mail air: Prohibited; domestic mail surface: 3A

> Valeraldehyde 3 UN2058 II Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Valeraldehyde — Postal shipping restrictions by item category


**Item category:** Valeryl chloride

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN2502, packing group II; domestic mail air: 8A; domestic mail surface: 8A

> Valeryl chloride 8 UN2502 II 8A 8A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Valeryl chloride — Postal shipping restrictions by item category


**Item category:** Vanadium compound, n.o.s.

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3285, packing group III; domestic mail air: 6A; domestic mail surface: 6A

> Vanadium compound, n.o.s. 6.1 UN3285 III 6A 6A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vanadium compound, n.o.s. — Postal shipping restrictions by item category


**Item category:** Vanadium oxytrichloride

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN2443, packing group II; domestic mail air: 8A; domestic mail surface: 8A

> Vanadium oxytrichloride 8 UN2443 II 8A 8A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vanadium oxytrichloride — Postal shipping restrictions by item category


**Item category:** Vanadium pentoxide, non-fused form

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2862, packing group III; domestic mail air: 6A; domestic mail surface: 6A

> Vanadium pentoxide, non-fused form 6.1 UN2862 III 6A 6A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vanadium pentoxide, non-fused form — Postal shipping restrictions by item category


**Item category:** Vanadium tetrachloride

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN2444, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Vanadium tetrachloride 8 UN2444 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vanadium tetrachloride — Postal shipping restrictions by item category


**Item category:** Vanadium trichloride

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 8, UN2475, packing group III; domestic mail air: 8A; domestic mail surface: 8A

> Vanadium trichloride 8 UN2475 III 8A 8A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vanadium trichloride — Postal shipping restrictions by item category


**Item category:** Vanadyl sulfate

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2931, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Vanadyl sulfate 6.1 UN2931 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vanadyl sulfate — Postal shipping restrictions by item category


**Item category:** Vehicle, flammable gas powered or Vehicle, fuel cell, flammable gas powered

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 9, UN3166, packing group n/a; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Vehicle, flammable gas powered or Vehicle, fuel cell, flammable gas powered 9 UN3166 n/a Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vehicle, flammable gas powered or Vehicle, fuel cell, flammable gas powered — Postal shipping restrictions by item category


**Item category:** Vehicle, flammable liquid powered or Vehicle, fuel cell, flammable liquid powered

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 9, UN3166, packing group n/a; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Vehicle, flammable liquid powered or Vehicle, fuel cell, flammable liquid powered 9 UN3166 n/a Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vehicle, flammable liquid powered or Vehicle, fuel cell, flammable liquid powered — Postal shipping restrictions by item category


**Item category:** Vinyl acetate, stabilized

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN1301, packing group II; domestic mail air: Prohibited; domestic mail surface: 3A

> Vinyl acetate, stabilized 3 UN1301 II Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vinyl acetate, stabilized — Postal shipping restrictions by item category


**Item category:** Vinyl bromide, stabilized

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 2.1, UN1085, packing group n/a; domestic mail air: Prohibited; domestic mail surface: 2A

> Vinyl bromide, stabilized 2.1 UN1085 n/a Prohibited 2A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vinyl bromide, stabilized — Postal shipping restrictions by item category


**Item category:** Vinyl butyrate, stabilized

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN2838, packing group II; domestic mail air: Prohibited; domestic mail surface: 3A

> Vinyl butyrate, stabilized 3 UN2838 II Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vinyl butyrate, stabilized — Postal shipping restrictions by item category


**Item category:** Vinyl chloride, stabilized

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 2.1, UN1086, packing group n/a; domestic mail air: Prohibited; domestic mail surface: 2A

> Vinyl chloride, stabilized 2.1 UN1086 n/a Prohibited 2A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vinyl chloride, stabilized — Postal shipping restrictions by item category


**Item category:** Vinyl chloroacetate

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN2589, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Vinyl chloroacetate 6.1 UN2589 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vinyl chloroacetate — Postal shipping restrictions by item category


**Item category:** Vinyl ethyl ether, stabilized

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 3, UN1302, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Vinyl ethyl ether, stabilized 3 UN1302 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vinyl ethyl ether, stabilized — Postal shipping restrictions by item category


**Item category:** Vinyl fluoride, stabilized

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 2.1, UN1860, packing group n/a; domestic mail air: Prohibited; domestic mail surface: 2A

> Vinyl fluoride, stabilized 2.1 UN1860 n/a Prohibited 2A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vinyl fluoride, stabilized — Postal shipping restrictions by item category


**Item category:** Vinyl isobutyl ether, stabilized

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN1304, packing group II; domestic mail air: Prohibited; domestic mail surface: 3A

> Vinyl isobutyl ether, stabilized 3 UN1304 II Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vinyl isobutyl ether, stabilized — Postal shipping restrictions by item category


**Item category:** Vinyl methyl ether, stabilized

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 2.1, UN1087, packing group n/a; domestic mail air: Prohibited; domestic mail surface: 2A

> Vinyl methyl ether, stabilized 2.1 UN1087 n/a Prohibited 2A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vinyl methyl ether, stabilized — Postal shipping restrictions by item category


**Item category:** Vinyl nitrate polymer

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Listed as Forbidden in the Pub 52 Appendix A mailability guide; Prohibited in domestic mail by air and by surface.

> Vinyl nitrate polymer Forbidden Prohibited Prohibited Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vinyl nitrate polymer — Postal shipping restrictions by item category


**Item category:** Vinylidene chloride, stabilized

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN1303, packing group I; domestic mail air: Prohibited; domestic mail surface: 3A

> Vinylidene chloride, stabilized 3 UN1303 I Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vinylidene chloride, stabilized — Postal shipping restrictions by item category


**Item category:** Vinylpyridines, stabilized

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 6.1, UN3073, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Vinylpyridines, stabilized 6.1 UN3073 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vinylpyridines, stabilized — Postal shipping restrictions by item category


**Item category:** Vinyltoluenes, stabilized

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail: surface only (air prohibited)

**Conditions:** Hazard class 3, UN2618, packing group III; domestic mail air: Prohibited; domestic mail surface: 3A

> Vinyltoluenes, stabilized 3 UN2618 III Prohibited 3A

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vinyltoluenes, stabilized — Postal shipping restrictions by item category


**Item category:** Vinyltrichlorosilane, stabilized

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 3, UN1305, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Vinyltrichlorosilane, stabilized 3 UN1305 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Vinyltrichlorosilane, stabilized — Postal shipping restrictions by item category


**Item category:** Warheads, rocket with burster or expelling charge

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.4D, UN0370, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Warheads, rocket with burster or expelling charge 1.4D UN0370 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Warheads, rocket with burster or expelling charge — Postal shipping restrictions by item category


**Item category:** Warheads, rocket with bursting charge

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0286, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Warheads, rocket with bursting charge 1.1D UN0286 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Warheads, rocket with bursting charge — Postal shipping restrictions by item category


**Item category:** Warheads, torpedo with bursting charge

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 1.1D, UN0221, packing group II; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Warheads, torpedo with bursting charge 1.1D UN0221 II Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Warheads, torpedo with bursting charge — Postal shipping restrictions by item category


**Item category:** warm-blooded animals (cats, dogs, guinea pigs, hamsters, mice, rabbits, rats, squirrels)

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** all domestic mail

**Conditions:** Warm-blooded animals, except for adult birds and specified day-old birds, are not mailable; nonmailable list includes cats or kittens, dogs or puppies, guinea pigs, hamsters, mice, rabbits, rats, squirrels and flying squirrels

> Warm-blooded animals, except for adult birds and specified day-old birds under the specific conditions in this section, are not mailable.

Source: <https://pe.usps.com/text/pub52/pub52c5_008.htm>

warm-blooded animals (cats, dogs, guinea pigs, hamsters, mice, rabbits, rats, squirrels) — Postal shipping restrictions by item category

carrier, conditions, item_category, scope


**Item category:** Water-reactive liquid, corrosive, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.3, UN3129, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Water-reactive liquid, corrosive, n.o.s. 4.3 UN3129 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Water-reactive liquid, corrosive, n.o.s. — Postal shipping restrictions by item category


**Item category:** Water-reactive liquid, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.3, UN3148, packing group I, II, III; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Water-reactive liquid, n.o.s. 4.3 UN3148 I, II, III Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Water-reactive liquid, n.o.s. — Postal shipping restrictions by item category


**Item category:** Water-reactive liquid, toxic, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.3, UN3130, packing group I, II, III; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Water-reactive liquid, toxic, n.o.s. 4.3 UN3130 I, II, III Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Water-reactive liquid, toxic, n.o.s. — Postal shipping restrictions by item category


**Item category:** Water-reactive solid, corrosive, n.o.s.

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** domestic mail (air and surface)

**Conditions:** Hazard class 4.3, UN3131, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited

> Water-reactive solid, corrosive, n.o.s. 4.3 UN3131 I Prohibited Prohibited

Source: <https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf>

Water-reactive solid, corrosive, n.o.s. — Postal shipping restrictions by item category