# Oxidizing substances or organic peroxides qualifying as Limited Quantity — Postal shipping restrictions by item category

For Oxidizing substances or organic peroxides qualifying as Limited Quantity, carrier is USPS; restriction type is restricted; scope is domestic mail via air or surface transportation; conditions is Permitted if qualify as Limited Quantity air or Limited Quantity surface materials, recorded from its source on 2026-08-04.

- **Item category:** Oxidizing substances or organic peroxides qualifying as Limited Quantity
- **Carrier:** USPS _(our reading, not quoted from the source)_
- **Restriction type:** restricted _(our reading, not quoted from the source)_
- **Scope:** domestic mail via air or surface transportation _(our reading, not quoted from the source)_
- **Conditions:** Permitted if qualify as Limited Quantity air or Limited Quantity surface materials

## What the source says

> Domestic Mail via Air or Surface Transportation: Oxidizing substances or organic peroxides that qualify as Limited Quantity air or Limited Quantity surface are permitted.

## Source

- https://pe.usps.com/text/pub52/pub52c3_024.htm

Last verified: 2026-08-04. Review by: 2027-08-04.
Part of [Postal shipping restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).