Potassium, metal alloys, liquid · USPS
What is the restriction type for Potassium, metal alloys, liquid · USPS?
For Potassium, metal alloys, liquid, carrier is USPS; restriction type is restricted; scope is domestic mail: surface only (air prohibited); conditions is Hazard class 4.3, UN1420, packing group I; domestic mail air: Prohibited; domestic mail surface: 4A, recorded from its source on 2026-08-10.
Potassium, metal alloys, liquid 4.3 UN1420 I Prohibited 4A
— pe.usps.com, retrieved 2026-08-10
- Item or substance
- Potassium, metal alloys, liquid verified
- Carrier
- USPS our reading
- Restriction type
- restricted our reading
- Scope
- domestic mail: surface only (air prohibited) our reading
- Conditions
- Hazard class 4.3, UN1420, packing group I; domestic mail air: Prohibited; domestic mail surface: 4A
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.
Source
- pe.usps.comhttps://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf