# Organic peroxides (Division 5.2) not qualifying as Limited Quantity — Postal shipping restrictions by item category

For Organic peroxides (Division 5.2) not qualifying as Limited Quantity, carrier is USPS; restriction type is prohibited; scope is all mail; conditions is Organic peroxides are nonmailable unless they qualify as Limited Quantity air or Limited Quantity surface, recorded from its source on 2026-08-04.

- **Item category:** Organic peroxides (Division 5.2) not qualifying as Limited Quantity _(unconfirmed — we could not tie this to the quote below)_
- **Carrier:** USPS _(our reading, not quoted from the source)_
- **Restriction type:** prohibited _(our reading, not quoted from the source)_
- **Scope:** all mail _(our reading, not quoted from the source)_
- **Conditions:** Organic peroxides are nonmailable unless they qualify as Limited Quantity air or Limited Quantity surface

## What the source says

> Division 5.2, Organic Peroxides: Organic peroxides are nonmailable unless they qualify as Limited Quantity air or Limited Quantity surface.

## 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/).