# Hydrogen peroxide solution (more than 20%) — Postal shipping restrictions by item category

For Hydrogen peroxide solution (more than 20%), carrier is USPS; restriction type is prohibited; scope is all mail; conditions is Nonmailable Division 5.1 oxidizing substance, recorded from its source on 2026-08-04.

- **Item category:** Hydrogen peroxide solution (more than 20%) _(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:** Nonmailable Division 5.1 oxidizing substance _(unconfirmed — we could not tie this to the quote below)_

## What the source says

> Hydrogen peroxide solution (more than 20 percent).

## 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/).