---
type: restriction
id: usps-dry-ice-carbon-dioxide-solid
asset: shipping-restrictions-by-class
title: "Dry Ice (carbon dioxide solid) — Postal shipping restrictions by item category"
sources:
  - https://pe.usps.com/text/pub52/welcome.htm
source_quote: "ps://pe.usps.com/text/pub52/pub52apxc_029.htm#ep1000804> 9A Dry Ice (Carbon Dioxide Solid) <https://pe.usps.com/text/pub52/pub52apxc_030.htm#ep1000830> 9B Magnetized Materials <https://pe.usps.com/text/pub52/pub52apxc_031.htm#ep1000862> 9C Miscellaneous Hazardous Materials <https://pe.usps.com/text/pub52/pub52apxc_032.htm#ep1000901> 9D Lithium Metal and Lith"
generated: true
harvested: 2026-08-04
stale_after: 2027-08-04
item_category: "Dry Ice (carbon dioxide solid)"
carrier: "USPS"
restriction_type: "restricted"
scope: "Domestic Mail via Air Transportation (up to 5 pounds per mailpiece) or Surface Transportation; prohibited International"
conditions: "Via air, permitted in quantities of up to 5 pounds per mailpiece. Must comply with Packaging Instruction 9A in Appendix C. Dry ice is prohibited in international mail."
verified: true
unverified_fields: conditions, restriction_type, scope
---
**Item category:** Dry Ice (carbon dioxide solid)

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** Domestic Mail via Air Transportation (up to 5 pounds per mailpiece) or Surface Transportation; prohibited International

**Conditions:** Via air, permitted in quantities of up to 5 pounds per mailpiece. Must comply with Packaging Instruction 9A in Appendix C. Dry ice is prohibited in international mail.

> ps://pe.usps.com/text/pub52/pub52apxc_029.htm#ep1000804> 9A Dry Ice (Carbon Dioxide Solid) <https://pe.usps.com/text/pub52/pub52apxc_030.htm#ep1000830> 9B Magnetized Materials <https://pe.usps.com/text/pub52/pub52apxc_031.htm#ep1000862> 9C Miscellaneous Hazardous Materials <https://pe.usps.com/text/pub52/pub52apxc_032.htm#ep1000901> 9D Lithium Metal and Lith

Source: <https://pe.usps.com/text/pub52/welcome.htm>