Perchloric acid with more than 50 percent but not more than 72 percent acid, by mass
For Perchloric acid with more than 50 percent but not more than 72 percent acid, by mass, carrier is USPS; restriction type is prohibited; scope is domestic mail (air and surface); conditions is Hazard class 5.1, UN1873, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited, recorded from its source on 2026-08-10.
- Item category
- Perchloric acid with more than 50 percent but not more than 72 percent acid, by mass verified
- Carrier
- USPS our reading
- Restriction type
- prohibited our reading
- Scope
- domestic mail (air and surface) our reading
- Conditions
- Hazard class 5.1, UN1873, packing group I; 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
Perchloric acid with more than 50 percent but not more than 72 percent acid, by mass 5.1 UN1873 I Prohibited Prohibited
— pe.usps.com, retrieved 2026-08-10
Source
- pe.usps.comhttps://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf