Records 2,401–2,800 — What can be mailed: USPS hazardous materials, plus item rules for post and couriers

Records 2,401 to 2,800 of 3,068. Each links to its own page, which carries the source URL and the quoted line that states the value.

• Selenic acid · USPSSelenic acid 8 UN1905 I Prohibited Prohibited
• Selenium compound, liquid, n.o.s. · USPS · I, IISelenium compound, liquid, n.o.s. 6.1 UN3440 I, II Prohibited Prohibited
• Selenium compound, liquid, n.o.s. · USPS · IIISelenium compound, liquid, n.o.s. 6.1 UN3440 III 6A 6A
• Selenium compound, solid, n.o.s. · USPS · I, IISelenium compound, solid, n.o.s. 6.1 UN3283 I, II Prohibited Prohibited
• Selenium compound, solid, n.o.s. · USPS · IIISelenium compound, solid, n.o.s. 6.1 UN3283 III 6A 6A
• Selenium disulfide · USPSSelenium disulfide 6.1 UN2657 II Prohibited Prohibited
• Selenium hexafluoride · USPSSelenium hexafluoride 2.3 UN2194 Prohibited Prohibited
• Selenium nitride · USPSSelenium nitride Forbidden Prohibited Prohibited Prohibited Prohibited
• Selenium oxychloride · USPSSelenium oxychloride 8 UN2879 I Prohibited Prohibited
• Self-defense spray, non-pressurized · USPSSelf-defense spray, non-pressurized 9 NA3334 III 9C 9C
• Self-heating liquid, corrosive, inorganic, n.o.s. · USPSSelf-heating liquid, corrosive, inorganic, n.o.s. 4.2 UN3188 II, III Prohibited Prohibited
• Self-heating liquid, corrosive, organic, n.o.s. · USPSSelf-heating liquid, corrosive, organic, n.o.s. 4.2 UN3185 II, III Prohibited Prohibited
• Self-heating liquid, inorganic, n.o.s. · USPSSelf-heating liquid, inorganic, n.o.s. 4.2 UN3186 II, III Prohibited Prohibited
• Self-heating liquid, organic, n.o.s. · USPSSelf-heating liquid, organic, n.o.s. 4.2 UN3183 II, III Prohibited Prohibited
• Self-heating liquid, toxic, inorganic, n.o.s. · USPSSelf-heating liquid, toxic, inorganic, n.o.s. 4.2 UN3187 II, III Prohibited Prohibited
• Self-heating liquid, toxic, organic, n.o.s. · USPSSelf-heating liquid, toxic, organic, n.o.s. 4.2 UN3184 II, III Prohibited Prohibited
• Self-heating solid, corrosive, inorganic, n.o.s. · USPSSelf-heating solid, corrosive, inorganic, n.o.s. 4.2 UN3192 II, III Prohibited Prohibited
• Self-heating solid, corrosive, organic, n.o.s. · USPSSelf-heating solid, corrosive, organic, n.o.s. 4.2 UN3126 II, III Prohibited Prohibited
• Self-heating solid, inorganic, n.o.s. · USPSSelf-heating solid, inorganic, n.o.s. 4.2 UN3190 II, III Prohibited Prohibited
• Self-heating solid, organic, n.o.s. · USPSSelf-heating solid, organic, n.o.s. 4.2 UN3088 II, III Prohibited Prohibited
• Self-heating solid, oxidizing, n.o.s. · USPSSelf-heating solid, oxidizing, n.o.s. 4.2 UN3127 n/a Prohibited Prohibited
• Self-heating solid, toxic, inorganic, n.o.s. · USPSSelf-heating solid, toxic, inorganic, n.o.s. 4.2 UN3191 II, III Prohibited Prohibited
• Self-heating solid, toxic, organic, n.o.s. · USPSSelf-heating solid, toxic, organic, n.o.s. 4.2 UN3128 II, III Prohibited Prohibited
• Self-reactive liquid type B · USPSSelf-reactive liquid type B 4.1 UN3221 II Prohibited Prohibited
• Self-reactive liquid type B, temperature controlled · USPSSelf-reactive liquid type B, temperature controlled 4.1 UN3231 II Prohibited Prohibited
• Self-reactive liquid type C · USPSSelf-reactive liquid type C 4.1 UN3223 II Prohibited Prohibited
• Self-reactive liquid type C, temperature controlled · USPSSelf-reactive liquid type C, temperature controlled 4.1 UN3233 II Prohibited Prohibited
• Self-reactive liquid type D · USPSSelf-reactive liquid type D 4.1 UN3225 II Prohibited Prohibited
• Self-reactive liquid type D, temperature controlled · USPSSelf-reactive liquid type D, temperature controlled 4.1 UN3235 II Prohibited Prohibited
• Self-reactive liquid type E · USPSSelf-reactive liquid type E 4.1 UN3227 II Prohibited Prohibited
• Self-reactive liquid type E, temperature controlled · USPSSelf-reactive liquid type E, temperature controlled 4.1 UN3237 II Prohibited Prohibited
• Self-reactive liquid type F · USPSSelf-reactive liquid type F 4.1 UN3229 II Prohibited Prohibited
• Self-reactive liquid type F, temperature controlled · USPSSelf-reactive liquid type F, temperature controlled 4.1 UN3239 II Prohibited Prohibited
• Self-reactive solid type B · USPSSelf-reactive solid type B 4.1 UN3222 II Prohibited Prohibited
• Self-reactive solid type B, temperature controlled · USPSSelf-reactive solid type B, temperature controlled 4.1 UN3232 II Prohibited Prohibited
• Self-reactive solid type C · USPSSelf-reactive solid type C 4.1 UN3224 II Prohibited Prohibited
• Self-reactive solid type C, temperature controlled · USPSSelf-reactive solid type C, temperature controlled 4.1 UN3234 II Prohibited Prohibited
• Self-reactive solid type D · USPSSelf-reactive solid type D 4.1 UN3226 II Prohibited Prohibited
• Self-reactive solid type D, temperature controlled · USPSSelf-reactive solid type D, temperature controlled 4.1 UN3236 II Prohibited Prohibited
• Self-reactive solid type E · USPSSelf-reactive solid type E 4.1 UN3228 II Prohibited Prohibited
• Self-reactive solid type E, temperature controlled · USPSSelf-reactive solid type E, temperature controlled 4.1 UN3238 II Prohibited Prohibited
• Self-reactive solid type F · USPSSelf-reactive solid type F 4.1 UN3230 II Prohibited Prohibited
• Self-reactive solid type F, temperature controlled · USPSSelf-reactive solid type F, temperature controlled 4.1 UN3240 II Prohibited Prohibited
• Shale Oil · USPS · IShale Oil 3 UN1288 I Prohibited Prohibited
• Shale Oil · USPS · II, IIIShale Oil 3 UN1288 II, III Prohibited 3A
• Sharp objects · Royal Mail / Post OfficeSharp objects (including knives, kitchen utensils and gardening tools. Excludes blades – see Bladed items) International & UK – allowed in the mail, see packaging guidelines below:
• Sharp objects (scissors, blades, needles, syringes, chisels, saws, fishing hooks) · Royal Mail / ParcelforcePackaging guidelines Items must present no risk to employees, other postal items or recipients. Wrap heavy cardboard around sharp edges and points, strong enough to ensure that the
• Sharp or pointed items (inbound to the UK) · International mail to the United Kingdom (UPU list)Folding pocket knives where the cutting edge of its blade does not exceed 3 inches (7.62cm) or razor blades permanently enclosed in a cartridge or housing where less than 2mm is ex
• Shipment of Marijuana, as defined in 21 U.S.C. § 802(16) · UPSShipment of Marijuana, as defined in 21 U.S.C. § 802(16), is prohibited under any circumstances.
• short-barreled rifles or shotguns - concealable · USPSShort-barreled rifles or shotguns that can be concealed on the person are nonmailable.
• Shotgun hulls, empty casings, nonmetallic shotgun hulls, or casings without primers · USPSShotgun Hulls, Empty Casings, Nonmetallic Shotgun Hulls, or Casings Without Primers: These articles are not classified as explosives or hazardous materials under 49 CFR and, theref
• Signal devices, hand · USPSSignal devices, hand 1.4S UN0373 II Prohibited Prohibited
• Signals, distress, ship · USPSSignals, distress, ship 1.1G UN0194 II Prohibited Prohibited
• Signals, railway track, explosive · USPSSignals, railway track, explosive 1.1G UN0192 II Prohibited Prohibited
• Signals, smoke · USPSSignals, smoke 1.2G UN0313 II Prohibited Prohibited
• Silane · USPSSilane 2.1 UN2203 n/a Prohibited Prohibited
• Silicon powder, amorphous · USPSSilicon powder, amorphous 4.1 UN1346 III Prohibited Prohibited
• Silicon tetrachloride · USPSSilicon tetrachloride 8 UN1818 II 8A 8A
• Silicon tetrafluoride, compressed · USPSSilicon tetrafluoride, compressed 2.3 UN1859 n/a Prohibited Prohibited
• Silver acetylide (dry) · USPSSilver acetylide (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Silver arsenite · USPSSilver arsenite 6.1 UN1683 II Prohibited Prohibited
• Silver azide (dry) · USPSSilver azide (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Silver chlorite (dry) · USPSSilver chlorite (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Silver cyanide · USPSSilver cyanide 6.1 UN1684 II Prohibited Prohibited
• Silver fulminate (dry) · USPSSilver fulminate (dry) Forbidden Prohibited Prohibited
• Silver nitrate · USPSSilver nitrate 5.1 UN1493 II 5A 5A
• Silver oxalate (dry) · USPSSilver oxalate (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Silver picrate (dry) · USPSSilver picrate (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Silver picrate, wetted with not less than 30 percent water, by mass · USPSSilver picrate, wetted with not less than 30 percent water, by mass 4.1 UN1347 I Prohibited Prohibited
• Sludge, acid · USPSSludge, acid 8 UN1906 II Prohibited Prohibited
• Small Arms Ammunition regulated as Class 1 explosive · USPSAmmunition that is regulated as a Class 1 explosive and designed to be fired from a pistol, revolver, rifle, or shotgun, as well as associated primers and blank cartridges (includi
• small harmless cold-blooded animals (except snakes, turtles, turtle eggs) · USPSSmall, harmless, cold-blooded animals, except for snakes, turtles, and turtle eggs, are mailable only when they meet requirements specified in Exhibit 526.6
• Smokeless powder for small arms (100 pounds or less) · USPSSmokeless powder for small arms (100 pounds or less) 4.1 NA3178 I Prohibited Prohibited
• smokeless tobacco · USPSSmokeless Tobacco: Any finely cut, ground, powdered, or leaf tobacco intended to be placed in the oral or nasal cavity or otherwise consumed without combustion.
• snakes, turtles, and poisonous reptiles · USPSAll snakes, turtles, and poisonous reptiles are nonmailable.
• Soda lime with more than 4 percent sodium hydroxide · USPSSoda lime with more than 4 percent sodium hydroxide 8 UN1907 III 8A 8A
• Sodium · USPSSodium 4.3 UN1428 I Prohibited Prohibited
• Sodium aluminate, solid · USPSSodium aluminate, solid 8 UN2812 III 8A 8A
• Sodium aluminate, solution · USPSSodium aluminate, solution 8 UN1819 II, III 8A 8A
• Sodium aluminum hydride · USPSSodium aluminum hydride 4.3 UN2835 II Prohibited 4A
• Sodium ammonium vanadate · USPSSodium ammonium vanadate 6.1 UN2863 II Prohibited Prohibited
• Sodium arsanilate · USPSSodium arsanilate 6.1 UN2473 III 6A 6A
• Sodium arsenate · USPSSodium arsenate 6.1 UN1685 II Prohibited Prohibited
• Sodium arsenite, aqueous solutions · USPS · IISodium arsenite, aqueous solutions 6.1 UN1686 II Prohibited Prohibited
• Sodium arsenite, aqueous solutions · USPS · IIISodium arsenite, aqueous solutions 6.1 UN1686 III 6A 6A
• Sodium arsenite, solid · USPSSodium arsenite, solid 6.1 UN2027 II Prohibited Prohibited
• Sodium azide · USPSSodium azide 6.1 UN1687 II Prohibited Prohibited
• Sodium borohydride · USPSSodium borohydride 4.3 UN1426 I Prohibited Prohibited
• Sodium bromate · USPSSodium bromate 5.1 UN1494 II 5A 5A
• Sodium cacodylate · USPSSodium cacodylate 6.1 UN1688 II Prohibited Prohibited
• Sodium carbonate peroxyhydrate · USPSSodium carbonate peroxyhydrate 5.1 UN3378 II, III 5A 5A
• Sodium chlorate · USPSSodium chlorate 5.1 UN1495 II 5A 5A
• Sodium chlorate, aqueous solution · USPSSodium chlorate, aqueous solution 5.1 UN2428 II, III 5A 5A
• Sodium chlorite · USPSSodium chlorite.
• Sodium chloroacetate · USPSSodium chloroacetate 6.1 UN2659 III 6A 6A
• Sodium cuprocyanide, solid · USPSSodium cuprocyanide, solid 6.1 UN2316 I Prohibited Prohibited
• Sodium cuprocyanide, solution · USPSSodium cuprocyanide, solution 6.1 UN2317 I Prohibited Prohibited
• Sodium cyanide, solid · USPSSodium cyanide, solid 6.1 UN1689 I Prohibited Prohibited
• Sodium cyanide, solution · USPS · I, IISodium cyanide, solution 6.1 UN3414 I, II Prohibited Prohibited
• Sodium cyanide, solution · USPS · IIISodium cyanide, solution 6.1 UN3414 III Prohibited 6A
• Sodium dinitro-o-cresolate, dry or wetted with less than 15 percent water, by mass · USPSSodium dinitro-o-cresolate, dry or wetted with less than 15 percent water, by mass 1.3C UN0234 II Prohibited Prohibited
• Sodium dinitro-o-cresolate, wetted with not less than 10 percent water, by mass · USPSSodium dinitro-o-cresolate, wetted with not less than 10 percent water, by mass 4.1 UN3369 I Prohibited Prohibited
• Sodium dinitro-o-cresolate, wetted with not less than 15 percent water, by mass · USPSSodium dinitro-o-cresolate, wetted with not less than 15 percent water, by mass 4.1 UN1348 I Prohibited Prohibited
• Sodium dithionite or Sodium hydrosulfite · USPSSodium dithionite or Sodium hydrosulfite 4.2 UN1384 II Prohibited Prohibited
• Sodium fluoride, solid · USPSSodium fluoride, solid 6.1 UN1690 III 6A 6A
• Sodium fluoride, solution · USPSSodium fluoride, solution 6.1 UN3415 III 6A 6A
• Sodium fluoroacetate · USPSSodium fluoroacetate 6.1 UN2629 I Prohibited Prohibited
• Sodium fluorosilicate · USPSSodium fluorosilicate 6.1 UN2674 III 6A 6A
• Sodium hydride · USPSSodium hydride 4.3 UN1427 I Prohibited Prohibited
• Sodium hydrogendifluoride · USPSSodium hydrogendifluoride 8 UN2439 II 8A 8A
• Sodium hydrosulfide, with less than 25 percent water of crystallization · USPSSodium hydrosulfide, with less than 25 percent water of crystallization 4.2 UN2318 II Prohibited Prohibited
• Sodium hydrosulfide, with not less than 25 percent water of crystallization · USPSSodium hydrosulfide, with not less than 25 percent water of crystallization 8 UN2949 II Prohibited Prohibited
• Sodium hydroxide, solid · USPSSodium hydroxide, solid 8 UN1823 II 8A 8A
• Sodium hydroxide solution · USPSSodium hydroxide solution 8 UN1824 II, III 8A 8A
• Sodium methylate · USPSSodium methylate 4.2 UN1431 II Prohibited Prohibited
• Sodium methylate solutions in alcohol · USPS · IISodium methylate solutions in alcohol 3 UN1289 II Prohibited Prohibited
• Sodium methylate solutions in alcohol · USPS · IIISodium methylate solutions in alcohol 3 UN1289 III Prohibited 3A
• Sodium monoxide · USPSSodium monoxide 8 UN1825 II 8A 8A
• Sodium nitrate · USPSSodium nitrate 5.1 UN1498 III 5A 5A
• Sodium nitrate and potassium nitrate mixtures · USPSSodium nitrate and potassium nitrate mixtures 5.1 UN1499 III 5A 5A
• Sodium nitrite · USPSSodium nitrite 5.1 UN1500 III 5A 5A
• Sodium pentachlorophenate · USPSSodium pentachlorophenate 6.1 UN2567 II Prohibited Prohibited
• Sodium perborate monohydrate · USPSSodium perborate monohydrate 5.1 UN3377 III 5A 5A
• Sodium perchlorate · USPSSodium perchlorate 5.1 UN1502 II 5A 5A
• Sodium permanganate · USPSSodium permanganate 5.1 UN1503 II 5A 5A
• Sodium peroxide · USPSSodium peroxide 5.1 UN1504 I Prohibited Prohibited
• Sodium peroxoborate, anhydrous · USPSSodium peroxoborate, anhydrous 5.1 UN3247 II 5A 5A
• Sodium persulfate · USPSSodium persulfate 5.1 UN1505 III 5A 5A
• Sodium phosphide · USPSSodium phosphide 4.3 UN1432 I Prohibited 4A
• Sodium picramate, dry or wetted with less than 20 percent water, by mass · USPSSodium picramate, dry or wetted with less than 20 percent water, by mass 1.3C UN0235 II Prohibited Prohibited
• Sodium picramate, wetted with not less than 20 percent water, by mass · USPSSodium picramate, wetted with not less than 20 percent water, by mass 4.1 UN1349 I Prohibited Prohibited
• Sodium picryl peroxide · USPSSodium picryl peroxide Forbidden Prohibited Prohibited Prohibited Prohibited
• Sodium sulfide, hydrated with not less than 30 percent water · USPSSodium sulfide, hydrated with not less than 30 percent water 8 UN1849 II Prohibited Prohibited
• Sodium superoxide · USPSSodium superoxide 5.1 UN2547 I Prohibited Prohibited
• Sodium tetranitride · USPSSodium tetranitride Forbidden Prohibited Prohibited Prohibited Prohibited
• Solids containing corrosive liquid, n.o.s. · USPSSolids containing corrosive liquid, n.o.s. 8 UN3244 II 8A 8A
• Solids containing flammable liquid, n.o.s. · USPSSolids containing flammable liquid, n.o.s. 4.1 UN3175 II Prohibited 4A
• Solids containing toxic liquid, n.o.s. · USPSSolids containing toxic liquid, n.o.s. 6.1 UN3243 II Prohibited Prohibited
• Solvent-based paints, wood varnishes and enamels · Royal Mail / Post OfficeSolvent-based paints, wood varnishes and enamels International – not allowed in the mail UK – not allowed in the mail
• Solvent-based paints, wood varnishes and enamels · Royal Mail Wholesale (Access customers)Solvent-based paints, wood varnishes and enamels Including gloss paint
• Sounding devices, explosive · USPSSounding devices, explosive 1.1D UN0374 II Prohibited Prohibited
• Stannic chloride, anhydrous · USPSStannic chloride, anhydrous 8 UN1827 II 8A 8A
• Stannic chloride, pentahydrate · USPSStannic chloride, pentahydrate 8 UN2440 III 8A 8A
• Stannic phosphide · USPSStannic phosphide 4.3 UN1433 I Prohibited Prohibited
• Stibine · USPSStibine 2.3 UN2676 n/a Prohibited Prohibited
• Strike-Anywhere Matches · USPSStrike-anywhere matches may not be mailed domestically.
• Strontium arsenite · USPSStrontium arsenite 6.1 UN1691 II Prohibited Prohibited
• Strontium chlorate · USPSStrontium chlorate 5.1 UN1506 II 5A 5A
• Strontium nitrate · USPSStrontium nitrate 5.1 UN1507 III 5A 5A
• Strontium perchlorate · USPSStrontium perchlorate 5.1 UN1508 II 5A 5A
• Strontium peroxide · USPSStrontium peroxide 5.1 UN1509 II 5A 5A
• Strontium phosphide · USPSStrontium phosphide 4.3 UN2013 I Prohibited Prohibited
• Strychnine or Strychnine salts · USPSStrychnine or Strychnine salts 6.1 UN1692 I Prohibited Prohibited
• Styrene monomer, stabilized · USPSStyrene monomer, stabilized 3 UN2055 III Prohibited 3A
• Substances, explosive, n.o.s. · USPSSubstances, explosive, n.o.s. 1.1A UN0473 II Prohibited Prohibited
• Substances, explosive, very insensitive, n.o.s., or Substances, EVI, n.o.s. · USPSSubstances, explosive, very insensitive, n.o.s., or Substances, EVI, n.o.s. 1.5D UN0482 II Prohibited Prohibited
• Substances requiring stabilization (otherwise forbidden) · US DOT (49 CFR, all modes)stabilized” may be added in association with the proper shipping name, as appropriate, where without stabilization the substance would be forbidden for transportation according to
• Substituted nitrophenol pesticides, liquid, toxic · USPS · I, IISubstituted nitrophenol pesticides, liquid, toxic 6.1 UN3014 I, II Prohibited Prohibited
• Substituted nitrophenol pesticides, liquid, toxic · USPS · IIISubstituted nitrophenol pesticides, liquid, toxic 6.1 UN3014 III 6A 6A
• Substituted nitrophenol pesticides, solid, toxic · USPS · I, IISubstituted nitrophenol pesticides, solid, toxic 6.1 UN2779 I, II Prohibited Prohibited
• Substituted nitrophenol pesticides, solid, toxic · USPS · IIISubstituted nitrophenol pesticides, solid, toxic 6.1 UN2779 III 6A 6A
• Sucrose octanitrate (dry) · USPSSucrose octanitrate (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Sulfamic acid · USPSSulfamic acid 8 UN2967 III 8A 8A
• Sulfur · USPSSulfur 9 NA1350 III Prohibited Prohibited
• Sulfur and chlorate, loose mixtures of · USPSSulfur and chlorate, loose mixtures of Forbidden Prohibited Prohibited Prohibited Prohibited
• Sulfur chlorides · USPSSulfur chlorides 8 UN1828 I Prohibited Prohibited
• Sulfur dioxide · USPSSulfur dioxide 2.3 UN1079 n/a Prohibited Prohibited
• Sulfur hexafluoride · USPSSulfur hexafluoride 2.2 UN1080 n/a 2B 2B
• Sulfur, molten · USPSSulfur, molten 9 NA2448 III Prohibited Prohibited
• Sulfur tetrafluoride · USPSSulfur tetrafluoride 2.3 UN2418 n/a Prohibited Prohibited
• Sulfur trioxide, stabilized · USPSSulfur trioxide, stabilized 8 UN1829 I Prohibited Prohibited
• Sulfuric acid, fuming with 30 percent or more free sulfur trioxide · USPSSulfuric acid, fuming with 30 percent or more free sulfur trioxide 8 UN1831 I Prohibited Prohibited
• Sulfuric acid, fuming with less than 30 percent free sulfur trioxide · USPSSulfuric acid, fuming with less than 30 percent free sulfur trioxide 8 UN1831 I Prohibited Prohibited
• Sulfuric acid, spent · USPSSulfuric acid, spent 8 UN1832 II Prohibited Prohibited
• Sulfuric acid (UN2796) · USPSSulfuric Acid (UN2796): Acceptable only in solutions of 25 percent or less acid that can qualify as a Limited Quantity air or Limited Quantity surface material.
• Sulfuric acid with more than 51 percent acid · USPSSulfuric acid with more than 51 percent acid 8 UN1830 II Prohibited Prohibited
• Sulfuric acid with not more than 51 percent acid · USPSSulfuric acid with not more than 51 percent acid 8 UN2796 II 8A 8A
• Sulfurous acid · USPSSulfurous acid 8 UN1833 II 8A 8A
• Sulfuryl chloride · USPSSulfuryl chloride 8 UN1834 I Prohibited Prohibited
• Sulfuryl fluoride · USPSSulfuryl fluoride 2.3 UN2191 n/a Prohibited Prohibited
• switchblade knife · USPSA switchblade knife features a blade that opens automatically by hand pressure applied to a button or other device on the handle, or through inertia, gravity, or both.
• switchblade knife - manufacturer or dealer to authorized recipients · USPSAuthorized manufacturers or bona fide dealers may mail switchblade knives to addresses within one of the categories listed above in connection with official procurement or resale.
• switchblade knife - to government procurement officials · USPSGovernment Supply or Procurement Officials: Designated officers or employees ordering, procuring, or purchasing switchblade knives in connection with the activities of their respec
• Tars, liquid including road oils and cutback, bitumens · USPSTars, liquid including road oils and cutback, bitumens 3 UN1999 II, III Prohibited 3A
• Tear gas · USPSTear gas (UN1700, NA1693, and UN1693), except for those containing oleoresin capsicum.
• Tear gas candles · USPSTear gas candles 6.1 UN1700 II Prohibited Prohibited
• Tear gas devices with more than 2 percent tear gas substances, by mass · USPSTear gas devices with more than 2 percent tear gas substances, by mass 6.1 NA1693 I, II Prohibited Prohibited
• Tear gas substances, liquid, n.o.s. · USPSTear gas substances, liquid, n.o.s. 6.1 UN1693 I, II Prohibited Prohibited
• Tear gas substances, solid, n.o.s. · USPSTear gas substances, solid, n.o.s. 6.1 UN3448 I, II Prohibited Prohibited
• Tellurium compound, n.o.s. · USPS · I, IITellurium compound, n.o.s. 6.1 UN3284 I, II Prohibited Prohibited
• Tellurium compound, n.o.s. · USPS · IIITellurium compound, n.o.s. 6.1 UN3284 III 6A 6A
• Tellurium hexafluoride · USPSTellurium hexafluoride 2.3 UN2195 n/a Prohibited Prohibited
• Terpene hydrocarbons, n.o.s. · USPSTerpene hydrocarbons, n.o.s. 3 UN2319 III Prohibited 3A
• Terpinolene · USPSTerpinolene 3 UN2541 III Prohibited 3A
• Tert-Butoxycarbonyl azide · USPSTert-Butoxycarbonyl azide Forbidden Prohibited Prohibited Prohibited Prohibited
• Tert-Butyl hydroperoxide, with more than 90 percent with water · USPSTert-Butyl hydroperoxide, with more than 90 percent with water Forbidden Prohibited Prohibited Prohibited Prohibited
• Tert-Butyl hypochlorite · USPSTert-Butyl hypochlorite 4.2 UN3255 I Prohibited Prohibited
• Tert-Butyl isocyanate · USPSTert-Butyl isocyanate 6.1 UN2484 I Prohibited Prohibited
• tert-Butyl peroxyacetate, with more than 76 percent in solution · USPStert-Butyl peroxyacetate, with more than 76 percent in solution Forbidden Prohibited Prohibited Prohibited Prohibited
• tert-Butyl peroxyisobutyrate, with more than 77 percent in solution · USPStert-Butyl peroxyisobutyrate, with more than 77 percent in solution Forbidden Prohibited Prohibited Prohibited Prohibited
• tert-Butylcyclohexylchloroformate · USPStert-Butylcyclohexylchloroformate 6.1 UN2747 III 6A 6A
• Tetraazido benzene quinone · USPSTetraazido benzene quinone Forbidden Prohibited Prohibited Prohibited Prohibited
• Tetrabromoethane · USPSTetrabromoethane 6.1 UN2504 III 6A 6A
• Tetrachloroethylene · USPSTetrachloroethylene 6.1 UN1897 III 6A 6A
• Tetraethyl dithiopyrophosphate · USPSTetraethyl dithiopyrophosphate 6.1 UN1704 II Prohibited Prohibited
• Tetraethyl silicate · USPSTetraethyl silicate 3 UN1292 III Prohibited 3A
• Tetraethylammonium perchlorate (dry) · USPSTetraethylammonium perchlorate (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Tetraethylenepentamine · USPSTetraethylenepentamine 8 UN2320 III 8A 8A
• Tetrafluoroethylene, stabilized · USPSTetrafluoroethylene, stabilized 2.1 UN1081 n/a Prohibited 2A
• Tetrafluoromethane or Refrigerant gas R 14 · USPSTetrafluoromethane or Refrigerant gas R 14 2.2 UN1982 n/a Prohibited Prohibited
• Tetrahydrofuran · USPSTetrahydrofuran 3 UN2056 II Prohibited Prohibited
• Tetrahydrofurfurylamine · USPSTetrahydrofurfurylamine 3 UN2943 III Prohibited 3A
• Tetrahydrophthalic anhydrides with more than 0.05 percent of maleic anhydride · USPSTetrahydrophthalic anhydrides with more than 0.05 percent of maleic anhydride 8 UN2698 III 8A 8A
• Tetrahydrothiophene · USPSTetrahydrothiophene 3 UN2412 II Prohibited 3A
• Tetramethylammonium hydroxide, solid · USPSTetramethylammonium hydroxide, solid 8 UN3423 II 8A 8A
• Tetramethylammonium hydroxide, solution · USPSTetramethylammonium hydroxide, solution 8 UN1835 II 8A 8A
• Tetramethylene diperoxide dicarbamide · USPSTetramethylene diperoxide dicarbamide Forbidden Prohibited Prohibited Prohibited Prohibited
• Tetramethylsilane · USPSTetramethylsilane 3 UN2749 I Prohibited Prohibited
• Tetranitro diglycerin · USPSTetranitro diglycerin Forbidden Prohibited Prohibited Prohibited Prohibited
• Tetranitroaniline · USPSTetranitroaniline 1.1D UN0207 II Prohibited Prohibited
• Tetranitromethane · USPSTetranitromethane.
• Tetranitroresorcinol (dry) · USPSTetranitroresorcinol (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Tetrapropylorthotitanate · USPSTetrapropylorthotitanate 3 UN2413 III Prohibited 3A
• Tetrazine (dry) · USPSTetrazine (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Tetrazol-1-acetic acid · USPSTetrazol-1-acetic acid 1.4C UN0407 II Prohibited Prohibited
• Tetrazolyl azide (dry) · USPSTetrazolyl azide (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Textile waste, wet · USPSTextile waste, wet 4.2 UN1857 III Prohibited Prohibited
• Thallium chlorate · USPSThallium chlorate 5.1 UN2573 II Prohibited Prohibited
• Thallium compounds, n.o.s. · USPSThallium compounds, n.o.s. 6.1 UN1707 II Prohibited Prohibited
• Thallium nitrate · USPSThallium nitrate 6.1 UN2727 II Prohibited Prohibited
• Thioacetic acid · USPSThioacetic acid 3 UN2436 II Prohibited 3A
• Thiocarbamate pesticide, liquid, flammable, toxic, flashpoint less than 23° C · USPSThiocarbamate pesticide, liquid, flammable, toxic, flashpoint less than 23° C 3 UN2772 I, II Prohibited Prohibited
• Thiocarbamate pesticide, liquid, toxic · USPS · I, IIThiocarbamate pesticide, liquid, toxic 6.1 UN3006 I, II Prohibited Prohibited
• Thiocarbamate pesticide, liquid, toxic · USPS · IIIThiocarbamate pesticide, liquid, toxic 6.1 UN3006 III 6A 6A
• Thiocarbamate pesticides, liquid, flammable, toxic, flashpoint not less than 23° C · USPS · I, IIThiocarbamate pesticides, liquid, flammable, toxic, flashpoint not less than 23° C 6.1 UN3005 I, II Prohibited Prohibited
• Thiocarbamate pesticides, liquid, flammable, toxic, flashpoint not less than 23° C · USPS · IIIThiocarbamate pesticides, liquid, flammable, toxic, flashpoint not less than 23° C 6.1 UN3005 III 6A 6A
• Thiocarbamate pesticides, solid, toxic · USPS · I, IIThiocarbamate pesticides, solid, toxic 6.1 UN2771 I, II Prohibited Prohibited
• Thiocarbamate pesticides, solid, toxic · USPS · IIIThiocarbamate pesticides, solid, toxic 6.1 UN2771 III 6A 6A
• Thioglycolic acid · USPSThioglycolic acid 8 UN1940 II 8A 8A
• Thiogylcol · USPSThiogylcol 6.1 UN2966 II Prohibited Prohibited
• Thiolactic acid · USPSThiolactic acid 6.1 UN2936 II Prohibited Prohibited
• Thionyl chloride · USPSThionyl chloride 8 UN1836 I Prohibited Prohibited
• Thiophene · USPSThiophene 3 UN2414 II Prohibited 3A
• Thiophosgene · USPSThiophosgene 6.1 UN2474 II Prohibited Prohibited
• Thiophosphoryl chloride · USPSThiophosphoryl chloride 8 UN1837 II Prohibited Prohibited
• Thiourea dioxide · USPSThiourea dioxide 4.2 UN3341 II, III Prohibited Prohibited
• Tickets and related advertisements for illegal lotteries · Royal Mail / Post OfficeTickets and related advertisements for illegal lotteries International – not allowed in the mail UK – not allowed in the mail
• Tickets and related advertisements for illegal lotteries · Royal Mail Wholesale (Access customers)Tickets and related advertisements for illegal lotteries
• Time-sensitive or critical written materials or documents · FedExTime-sensitive or critical written materials or documents including, but not limited to, bids and contract proposals
• Tinctures, medicinal · USPSTinctures, medicinal 3 UN1293 II, III Prohibited 3A
• Titanium disulphide · USPSTitanium disulphide 4.2 UN3174 III Prohibited Prohibited
• Titanium hydride · USPSTitanium hydride 4.1 UN1871 II Prohibited Prohibited
• Titanium powder, dry · USPSTitanium powder, dry 4.2 UN2546 I, II, III Prohibited Prohibited
• Titanium sponge granules or Titanium sponge powders · USPSTitanium sponge granules or Titanium sponge powders 4.1 UN2878 III Prohibited Prohibited
• Titanium tetrachloride · USPSTitanium tetrachloride 8 UN1838 II Prohibited Prohibited
• Titanium trichloride mixtures · USPSTitanium trichloride mixtures 8 UN2869 II, III 8A 8A
• Titanium trichloride, pryophoric or Titanium trichloride mixtures, pyrophoric · USPSTitanium trichloride, pryophoric or Titanium trichloride mixtures, pyrophoric 4.2 UN2441 I Prohibited Prohibited
• Tobacco Products · UPSShipments containing Tobacco Products (“Tobacco Product Shipments”), are accepted for transportation only from Shippers who are licensed and authorized to ship Tobacco Products pur
• Tobacco products (cigarettes and smokeless tobacco) · International mail to the United States (UPU list)Regardless of quantity; cigarettes (including roll-your-own tobacco) and smokeless tobacco are prohibited in any type of international mail into the United States.
• Toluene · USPSToluene 3 UN1294 II Prohibited 3A
• Toluene diisocyanate · USPSToluene diisocyanate 6.1 UN2078 II Prohibited Prohibited
• Toluidines liquid · USPSToluidines liquid 6.1 UN1708 II Prohibited Prohibited
• Toluidines solid · USPSToluidines solid 6.1 UN3451 II Prohibited Prohibited
• Torpedoes, liquid fueled, with inert head · USPSTorpedoes, liquid fueled, with inert head 1.3J UN0450 II Prohibited Prohibited
• Torpedoes, liquid fueled, with or without bursting charge · USPSTorpedoes, liquid fueled, with or without bursting charge 1.1J UN0449 II Prohibited Prohibited
• Torpedoes with bursting charge · USPSTorpedoes with bursting charge 1.1D UN0451 II Prohibited Prohibited
• Toxic gases (Division 2.3) · USPSToxic Gases: All Division 2.3 toxic gases are prohibited from mailing.
• Toxic liquid, corrosive, inorganic, n.o.s. · USPSToxic liquid, corrosive, inorganic, n.o.s. 6.1 UN3289 I, II Prohibited Prohibited
• Toxic liquid, inorganic, n.o.s. · USPS · I, IIToxic liquid, inorganic, n.o.s. 6.1 UN3287 I, II Prohibited Prohibited
• Toxic liquid, inorganic, n.o.s. · USPS · IIIToxic liquid, inorganic, n.o.s. 6.1 UN3287 III 6A 6A
• Toxic liquids, corrosive, organic, n.o.s. · USPSToxic liquids, corrosive, organic, n.o.s. 6.1 UN2927 I, II Prohibited Prohibited
• Toxic liquids, flammable, organic, n.o.s. · USPSToxic liquids, flammable, organic, n.o.s. 6.1 UN2929 I, II Prohibited Prohibited
• Toxic, liquids, organic, n.o.s. · USPS · I, IIToxic, liquids, organic, n.o.s. 6.1 UN2810 I, II Prohibited Prohibited
• Toxic, liquids, organic, n.o.s. · USPS · IIIToxic, liquids, organic, n.o.s. 6.1 UN2810 III 6A 6A
• Toxic liquids, oxidizing, n.o.s. · USPSToxic liquids, oxidizing, n.o.s. 6.1 UN3122 I, II Prohibited Prohibited
• Toxic liquids, water-reactive, n.o.s. · USPSToxic liquids, water-reactive, n.o.s. 6.1 UN3123 I, II Prohibited Prohibited
• Toxic solid, corrosive, inorganic, n.o.s. · USPSToxic solid, corrosive, inorganic, n.o.s. 6.1 UN3290 I, II Prohibited Prohibited
• Toxic solid, inorganic, n.o.s. · USPS · I, IIToxic solid, inorganic, n.o.s. 6.1 UN3288 I, II Prohibited Prohibited
• Toxic solid, inorganic, n.o.s. · USPS · IIIToxic solid, inorganic, n.o.s. 6.1 UN3288 III 6A 6A
• Toxic solids, corrosive, organic, n.o.s. · USPSToxic solids, corrosive, organic, n.o.s. 6.1 UN2928 I, II Prohibited Prohibited
• Toxic solids, flammable, organic, n.o.s. · USPSToxic solids, flammable, organic, n.o.s. 6.1 UN2930 I, II Prohibited Prohibited
• Toxic solids, organic, n.o.s · USPSToxic solids, organic, n.o.s 6.1 UN2811 III 6A 6A
• Toxic solids, organic, n.o.s. · USPSToxic solids, organic, n.o.s. 6.1 UN2811 I, II Prohibited Prohibited
• Toxic solids, oxidizing, n.o.s. · USPSToxic solids, oxidizing, n.o.s. 6.1 UN3086 I, II Prohibited Prohibited
• Toxic solids, self-heating, n.o.s. · USPSToxic solids, self-heating, n.o.s. 6.1 UN3124 I, II Prohibited Prohibited
• Toxic solids, water-reactive, n.o.s. · USPSToxic solids, water-reactive, n.o.s. 6.1 UN3125 I, II Prohibited Prohibited
• Toxins, extracted from living sources, liquid, n.o.s. · USPS · I, IIToxins, extracted from living sources, liquid, n.o.s. 6.1 UN3172 I, II Prohibited Prohibited
• Toxins, extracted from living sources, liquid, n.o.s. · USPS · IIIToxins, extracted from living sources, liquid, n.o.s. 6.1 UN3172 III 6A 6A
• Toxins, extracted from living sources, solid, n.o.s. · USPS · I, IIToxins, extracted from living sources, solid, n.o.s. 6.1 UN3462 I, II Prohibited Prohibited
• Toxins, extracted from living sources, solid, n.o.s. · USPS · IIIToxins, extracted from living sources, solid, n.o.s. 6.1 UN3462 III 6A 6A
• Toy caps · USPSToy caps 1.4S NA0337 II Prohibited Prohibited
• Toy guns, firearm parts, ammunition parts · DHLToy guns, firearm parts, ammunition parts, Tasers, controlled military items, and firearm attachments such as sights, magazines, silencers, gunstocks, torches, flash suppressors, a
• Toy Propellant Devices (UN0454 or NA0323, Division 1.4S) · USPSToy 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 wr
• Tracers for ammunition · USPSTracers for ammunition 1.3G UN0212 II Prohibited Prohibited
• Tranquilizing guns and ammunition · FedExTranquilizing guns and ammunition
• Tri-(b-nitroxyethyl) ammonium nitrate · USPSTri-(b-nitroxyethyl) ammonium nitrate Forbidden Prohibited Prohibited Prohibited Prohibited
• Triallyl borate · USPSTriallyl borate 6.1 UN2609 III 6A 6A
• Triallylamine · USPSTriallylamine 3 UN2610 III Prohibited Prohibited
• Triazine pesticides, liquid, flammable, toxic, flashpoint less than 23° C · USPSTriazine pesticides, liquid, flammable, toxic, flashpoint lessthan 23° C 3 UN2764 I, II Prohibited Prohibited
• Triazine pesticides, liquid, flammable, toxic, flashpoint lessthan 23° C · USPSTriazine pesticides, liquid, flammable, toxic, flashpoint lessthan 23° C 3 UN2764 I, II Prohibited Prohibited
• Triazine pesticides, liquid, toxic · USPS · I, IITriazine pesticides, liquid, toxic 6.1 UN2998 I, II Prohibited Prohibited
• Triazine pesticides, liquid, toxic · USPS · IIITriazine pesticides, liquid, toxic 6.1 UN2998 III 6A 6A
• Triazine pesticides, liquid, toxic, flammable, flashpoint not less than 23° C · USPS · I, IITriazine pesticides, liquid, toxic, flammable, flashpoint not less than 23° C 6.1 UN2997 I, II Prohibited Prohibited
• Triazine pesticides, liquid, toxic, flammable, flashpoint not less than 23° C · USPS · IIITriazine pesticides, liquid, toxic, flammable, flashpoint not less than 23° C 6.1 UN2997 III 6A 6A
• Triazine pesticides, solid, toxic · USPS · I, IITriazine pesticides, solid, toxic 6.1 UN2763 I, II Prohibited Prohibited
• Triazine pesticides, solid, toxic · USPS · IIITriazine pesticides, solid, toxic 6.1 UN2763 III 6A 6A
• Tributylamine · USPSTributylamine 6.1 UN2542 II Prohibited Prohibited
• Tributylphosphane · USPSTributylphosphane 4.2 UN3254 I Prohibited Prohibited
• Trichlorbenzenes, liquid · USPSTrichlorbenzenes, liquid 6.1 UN2321 III 6A 6A
• Trichloroacetic acid · USPSTrichloroacetic acid 8 UN1839 II 8A 8A
• Trichloroacetic acid, solution · USPSTrichloroacetic acid, solution 8 UN2564 II, III 8A 8A
• Trichloroacetyl chloride · USPSTrichloroacetyl chloride 8 UN2442 II Prohibited Prohibited
• Trichlorobutene · USPSTrichlorobutene 6.1 UN2322 II Prohibited Prohibited
• Trichloroethylene · USPSTrichloroethylene 6.1 UN1710 III 6A 6A
• Trichloroisocyanuric acid, dry · USPSTrichloroisocyanuric acid, dry 5.1 UN2468 II 5A 5A
• Trichloromethyl perchlorate · USPSTrichloromethyl perchlorate Forbidden Prohibited Prohibited Prohibited Prohibited
• Trichlorosilane · USPSTrichlorosilane 4.3 UN1295 I Prohibited Prohibited
• Tricresyl phosphate with more than 3 percent ortho isomer · USPSTricresyl phosphate with more than 3 percent ortho isomer 6.1 UN2574 II Prohibited Prohibited
• Triethyl phosphite · USPSTriethyl phosphite 3 UN2323 III Prohibited 3A
• Triethylamine · USPSTriethylamine 3 UN1296 II Prohibited Prohibited
• Triethylenetetramine · USPSTriethylenetetramine 8 UN2259 II 8A 8A
• Trifluoroacetic acid · USPSTrifluoroacetic acid 8 UN2699 I Prohibited Prohibited
• Trifluoroacetyl chloride · USPSTrifluoroacetyl chloride 2.3 UN3057 n/a Prohibited Prohibited
• Trifluorochloroethylene, stabilized · USPSTrifluorochloroethylene, stabilized 2.3 UN1082 n/a Prohibited Prohibited
• Trifluoromethane or Refrigerant gas R 23 · USPSTrifluoromethane or Refrigerant gas R 23 2.2 UN1984 n/a 2B 2B
• Trifluoromethane, refrigerated liquid · USPSTrifluoromethane, refrigerated liquid 2.2 UN3136 n/a 2B 2B
• Triformoxime trinitrate · USPSTriformoxime trinitrate Forbidden Prohibited Prohibited Prohibited Prohibited
• Triisobutylene · USPSTriisobutylene 3 UN2324 III Prohibited 3A
• Triisopropyl borate · USPSTriisopropyl borate 3 UN2616 II, III Prohibited 3A
• Trimethoxysilane · USPSTrimethoxysilane 6.1 NA9269 I Prohibited Prohibited
• Trimethyl borate · USPSTrimethyl borate 3 UN2416 II Prohibited 3A
• Trimethyl phosphite · USPSTrimethyl phosphite 3 UN2329 III Prohibited 3A
• Trimethylacetyl chloride · USPSTrimethylacetyl chloride 6.1 UN2438 I Prohibited Prohibited
• Trimethylamine, anhydrous · USPSTrimethylamine, anhydrous 2.1 UN1083 n/a Prohibited 2A
• Trimethylchlorosilane · USPSTrimethylchlorosilane 3 UN1298 II Prohibited Prohibited
• Trimethylcyclohexylamine · USPSTrimethylcyclohexylamine 8 UN2326 III 8A 8A
• Trimethylene glycol diperchlorate · USPSTrimethylene glycol diperchlorate Forbidden Prohibited Prohibited Prohibited Prohibited
• Trimethylhexamethylene diisocyanate · USPSTrimethylhexamethylene diisocyanate 6.1 UN2328 III 6A 6A
• Trimethylhexamethylenediamines · USPSTrimethylhexamethylenediamines 8 UN2327 III 8A 8A
• Trimethylol nitromethane trinitrate · USPSTrimethylol nitromethane trinitrate Forbidden Prohibited Prohibited Prohibited Prohibited
• Trinitro-m-cresol · USPSTrinitro-m-cresol 1.1D UN0216 II Prohibited Prohibited
• Trinitroacetic acid · USPSTrinitroacetic acid Forbidden Prohibited Prohibited Prohibited Prohibited
• Trinitroacetonitrile · USPSTrinitroacetonitrile Forbidden Prohibited Prohibited Prohibited Prohibited
• Trinitroamine cobalt · USPSTrinitroamine cobalt Forbidden Prohibited Prohibited Prohibited Prohibited
• Trinitroaniline or Picramide · USPSTrinitroaniline or Picramide 1.1D UN0153 II Prohibited Prohibited
• Trinitroanisole · USPSTrinitroanisole 1.1D UN0213 II Prohibited Prohibited
• Trinitrobenzene, dry or wetted with less than 30 percent water, by mass · USPSTrinitrobenzene, dry or wetted with less than 30 percent water, by mass 1.1D UN0214 II Prohibited Prohibited
• Trinitrobenzene, wetted, with not less than 10 percent water, by mass · USPSTrinitrobenzene, wetted, with not less than 10 percent water, by mass 4.1 UN3367 I Prohibited Prohibited
• Trinitrobenzenesulfonic acid · USPSTrinitrobenzenesulfonic acid 1.1D UN0386 II Prohibited Prohibited
• Trinitrobenzoic acid, dry or wetted with less than 30 percent water, by mass · USPSTrinitrobenzoic acid, dry or wetted with less than 30 percent water, by mass 1.1D UN0215 II Prohibited Prohibited
• Trinitrobenzoic acid, wetted with not less than 10 percent water, by mass · USPSTrinitrobenzoic acid, wetted with not less than 10 percent water, by mass 4.4 UN3368 I Prohibited Prohibited
• Trinitrobenzoic acid, wetted with not less than 30 percent water, by mass · USPSTrinitrobenzoic acid, wetted with not less than 30 percent water, by mass 4.1 UN1355 I Prohibited Prohibited
• Trinitrochlorobenzene or Picryl chloride · USPSTrinitrochlorobenzene or Picryl chloride 1.1D UN0155 II Prohibited Prohibited
• Trinitroethanol · USPSTrinitroethanol Forbidden Prohibited Prohibited Prohibited Prohibited
• Trinitroethylnitrate · USPSTrinitroethylnitrate Forbidden Prohibited Prohibited Prohibited Prohibited
• Trinitrofluorenone · USPSTrinitrofluorenone 1.1D UN0387 II Prohibited Prohibited
• Trinitromethane · USPSTrinitromethane Forbidden Prohibited Prohibited
• Trinitronaphthalene · USPSTrinitronaphthalene 1.1D UN0217 II Prohibited Prohibited
• Trinitrophenetole · USPSTrinitrophenetole 1.1D UN0218 II Prohibited Prohibited
• Trinitrophenol (picric acid), wetted with not less than 10 percent water by mass · USPSTrinitrophenol (picric acid), wetted with not less than 10 percent water by mass 4.1 UN3364 I Prohibited Prohibited
• Trinitrophenol, wetted with not less than 30 percent water, by mass · USPSTrinitrophenol, wetted with not less than 30 percent water, by mass 4.1 UN1344 I Prohibited Prohibited
• Trinitrophenylmethylnitramine or Tetryl · USPSTrinitrophenylmethylnitramine or Tetryl 1.1D UN0208 II Prohibited Prohibited
• Trinitrotetramine cobalt nitrate · USPSTrinitrotetramine cobalt nitrate Forbidden Prohibited Prohibited Prohibited Prohibited
• Trinitrotoluene or TNT, dry or wetted with less than 30 percent water, by mass · USPSTrinitrotoluene or TNT, dry or wetted with less than 30 percent water, by mass 1.1D UN0209 II Prohibited Prohibited
• Trinitrotoluene (TNT) wetted, with not less than 10 percent water by mass · USPSTrinitrotoluene (TNT) wetted, with not less than 10 percent water by mass 4.1 UN3366 I Prohibited Prohibited
• Trinitrotoluene wetted with not less than 30 percent water, by mass · USPSTrinitrotoluene wetted with not less than 30 percent water, by mass 4.1 UN1356 I Prohibited Prohibited
• Tripropylamine · USPSTripropylamine 3 UN2260 III Prohibited 3A
• Tripropylene · USPSTripropylene 3 UN2057 II, III Prohibited 3A
• Tris-(1-aziridinyl)phosphine oxide, solution · USPS · IITris-(1-aziridinyl)phosphine oxide, solution 6.1 UN2501 II Prohibited Prohibited
• Tris-(1-aziridinyl)phosphine oxide, solution · USPS · IIITris-(1-aziridinyl)phosphine oxide, solution 6.1 UN2501 III 6A 6A
• Tris, bis-bifluoroamino diethoxy propane (TVOPA) · USPSTris, bis-bifluoroamino diethoxy propane (TVOPA) Forbidden Prohibited Prohibited Prohibited Prohibited
• Tritonal · USPSTritonal 1.1D UN0390 II Prohibited Prohibited
• Tungsten hexafluoride · USPSTungsten hexafluoride 2.3 UN2196 n/a Prohibited Prohibited
• Turpentine · USPSTurpentine 3 UN1299 III Prohibited 3A
• Turpentine substitute · USPS · ITurpentine substitute 3 UN1300 I Prohibited Prohibited
• Turpentine substitute · USPS · II, IIITurpentine substitute 3 UN1300 II, III Prohibited 3A
• Undecane · USPSUndecane 3 UN2330 III Prohibited 3A
• Hazardous waste, defined as a solid waste that meets any of the criteria of the hazardous waste as described in 40 C.F.R. · UPSHazardous waste, defined as a solid waste that meets any of the criteria of the hazardous waste as described in 40 C.F.R. § 261.3;
• Radio frequency identification devices (RFID), ultrawideband devices (UWB), and other portable electronic devices (PED) · UPSUPS transports Shipments containing radio frequency identification devices (RFID), ultrawideband devices (UWB), and other portable electronic devices (PED) only when such devices a
• UPS Returns® Services Shipments · UPSUPS Returns® Services Shipments con- taining hazardous materials (except for Limited Quantity Ground Packages, as set forth below), or firearms, or Signature Required services;
• UPS Worldwide Express Freight® Service pallets that exceed maximum size or weight restrictions · UPSWithout prior approval by UPS, UPS Worldwide Express Freight® Service pallets that exceed maximum size or weight restrictions (which vary by origin and destination)
• Urea hydrogen peroxide · USPSUrea hydrogen peroxide 5.1 UN1511 III 5A 5A
• Urea nitrate, dry or wetted with less than 20 percent water, by mass · USPSUrea nitrate, dry or wetted with less than 20 percent water, by mass 1.1D UN0220 II Prohibited Prohibited
• Urea nitrate, wetted with not less than 10 percent water, by mass · USPSUrea nitrate, wetted with not less than 10 percent water, by mass 4.1 UN3370 I Prohibited Prohibited
• Urea nitrate, wetted with not less than 20 percent water, by mass · USPSUrea nitrate, wetted with not less than 20 percent water, by mass 4.1 UN1357 I Prohibited Prohibited
• Merchandise valued at $800 or less arriving by modes other than the international postal network (de minimis) · US CBP (imports into the United States)This indefinite suspension means that all entries of merchandise valued at $800 or less arriving through all modes other than the international postal network must utilize formal o
• Used, damaged, or defective electronic devices · USPSUsed, Damaged, or Defective Electronic Devices: Used, damaged, or defective electronic devices in international mail or domestic air transportation, except for new devices in origi
• Used health care products (not suspected to contain Category A) · USPSa 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
• Used healthcare products containing Category A infectious substance · USPSUsed Healthcare Products: Used healthcare products containing a Category A infectious substance.
• 1-Hydroxybenzotriazole, anhydrous, dry or wetted with less than 20 percent water, by mass · USPS1-Hydroxybenzotriazole, anhydrous, dry or wetted with less than 20 percent water, by mass 1.3C UN0508 n/a Prohibited Prohibited
• 2,2-Di-(4,4-di-tert- butylperoxycyclohexyl) propane, with more than 42 percent with inert solid · USPS2,2-Di-(4,4-di-tert- butylperoxycyclohexyl) propane, with more than 42 percent with inert solid Forbidden Prohibited Prohibited Prohibited Prohibited
• Acetic acid, glacial or Acetic acid solution, with more than 80 percent acid, by mass · USPSAcetic acid, glacial or Acetic acid solution, with more than 80 percent acid, by mass 8 UN2789 II 8A 8A
• Acetic acid solution, not less than 50 percent but not more than 80 percent acid, by mass · USPSAcetic acid solution, not less than 50 percent but not more than 80 percent acid, by mass 8 UN2790 II 8A 8A
• Acetic acid solution, with more than 10 percent and less than 50 percent acid, by mass · USPSAcetic acid solution, with more than 10 percent and less than 50 percent acid, by mass 8 UN2790 III 8A 8A
• Acetyl cyclohexanesulfonyl peroxide, with more than 82 percent wetted with less than 12 percent water · USPSAcetyl cyclohexanesulfonyl peroxide, with more than 82 percent wetted with less than 12 percent water Forbidden Prohibited Prohibited Prohibited Prohibited
• Aircraft hydraulic power unit fuel tank (containing a mixture of anhydrous hydrazine and monomethyl hydrazine) (M86 fuel) · USPSAircraft hydraulic power unit fuel tank (containing a mixture of anhydrous hydrazine and monomethyl hydrazine) (M86 fuel) 3 UN3165 I Prohibited Prohibited
• Alkyl sulfonic acids, liquid or Aryl sulfonic acids, liquid with more than 5 percent free sulfuric acid · USPSAlkyl sulfonic acids, liquid or Aryl sulfonic acids, liquid with more than 5 percent free sulfuric acid 8 UN2584 II 8A 8A
• Alkyl sulfonic acids, liquid or Aryl sulfonic acids, liquid with not more than 5 percent free sulfuric acid · USPSAlkyl sulfonic acids, liquid or Aryl sulfonic acids, liquid with not more than 5 percent free sulfuric acid 8 UN2586 III 8A 8A
• Alkyl sulfonic acids, solid or Aryl sulfonic acids, solid with more than 5 percent free sulfuric acid · USPSAlkyl sulfonic acids, solid or Aryl sulfonic acids, solid with more than 5 percent free sulfuric acid 8 UN2583 II 8A 8A
• Alkyl sulfonic acids, solid or Aryl sulfonic acids, solid with not more than 5 percent free sulfuric acid · USPSAlkyl sulfonic acids, solid or Aryl sulfonic acids, solid with not more than 5 percent free sulfuric acid 8 UN2585 III 8A 8A

← records 2,001–2,400 · All of What can be mailed: USPS hazardous materials, plus item rules for post and couriers · records 2,801 on →