Organometallic substance, solid, water-reactive, self-heating
For Organometallic substance, solid, water-reactive, self-heating, carrier is USPS; restriction type is prohibited; scope is domestic mail (air and surface); conditions is Hazard class 4.3, UN3397, packing group I, II, III; domestic mail air: Prohibited; domestic mail surface: Prohibited, recorded from its source on 2026-08-10.
- Item category
- Organometallic substance, solid, water-reactive, self-heating verified
- Carrier
- USPS our reading
- Restriction type
- prohibited our reading
- Scope
- domestic mail (air and surface) our reading
- Conditions
- Hazard class 4.3, UN3397, packing group I, II, III; domestic mail air: Prohibited; domestic mail surface: Prohibited verified
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
Organometallic substance, solid, water-reactive, self-heating 4.3 UN3397 I, II, III Prohibited Prohibited
— pe.usps.com, retrieved 2026-08-10
Source
- pe.usps.comhttps://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf