---
type: restriction
id: usps-oxidizing-substances-and-organic-peroxides-hazard-class-5-international-mail
asset: shipping-restrictions-by-class
title: "Oxidizing substances and organic peroxides (Hazard Class 5) — international mail — Postal shipping restrictions by item category"
sources:
  - https://pe.usps.com/text/pub52/pub52c3_024.htm
source_quote: "International Mail: All oxidizing substances and organic peroxides are prohibited."
generated: true
harvested: 2026-08-04
stale_after: 2027-08-04
item_category: "Oxidizing substances and organic peroxides (Hazard Class 5) — international mail"
carrier: "USPS"
restriction_type: "prohibited"
scope: "international mail"
conditions: "All oxidizing substances and organic peroxides are prohibited from international mail"
verified: true
unverified_fields: carrier
---
**Item category:** Oxidizing substances and organic peroxides (Hazard Class 5) — international mail

**Carrier:** USPS

**Restriction type:** prohibited

**Scope:** international mail

**Conditions:** All oxidizing substances and organic peroxides are prohibited from international mail

> International Mail: All oxidizing substances and organic peroxides are prohibited.

Source: <https://pe.usps.com/text/pub52/pub52c3_024.htm>