Reference Source

Diketene, stabilized · USPS

What is the restriction type for Diketene, stabilized · USPS?

For Diketene, stabilized, carrier is USPS; restriction type is prohibited; scope is domestic mail (air and surface); conditions is Hazard class 6.1, UN2521, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited, recorded from its source on 2026-08-10.

Diketene, stabilized 6.1 UN2521 I Prohibited Prohibited

— pe.usps.com, retrieved 2026-08-10

Item or substance
Diketene, stabilized verified
Carrier
USPS our reading
Restriction type
prohibited our reading
Scope
domestic mail (air and surface) our reading
Conditions
Hazard class 6.1, UN2521, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited
Sourcepe.usps.com
Verified
Review by
DatasetWhat can be mailed: USPS hazardous materials, plus item rules for post and couriers

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

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