Reference Source

Dry ice — domestic air · USPS

What is the item or substance for Dry ice — domestic air · USPS?

For Dry ice, carrier is USPS; item or substance is Dry ice — domestic air; restriction type is restricted; scope is domestic mail via air transportation; conditions is Permitted in quantities of up to 5 pounds per mailpiece; must comply with Packaging Instruction 9A, recorded from its source on 2026-08-04.

Domestic Mail via Air Transportation: Dry ice is permitted in quantities of up to 5 pounds per mailpiece.

— pe.usps.com, retrieved 2026-08-04

Item or substance
Dry ice — domestic air
Carrier
USPS our reading
Restriction type
restricted our reading
Scope
domestic mail via air transportation our reading
Conditions
Permitted in quantities of up to 5 pounds per mailpiece; must comply with Packaging Instruction 9A
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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