# Sulfuric acid (UN2796) — Postal shipping restrictions by item category

For Sulfuric acid (UN2796), carrier is USPS; restriction type is restricted; scope is domestic mail via air or surface transportation; conditions is Acceptable only in solutions of 25% or less acid that qualify as Limited Quantity air or surface; Packaging Instruction 8A must be followed, recorded from its source on 2026-08-04.

- **Item category:** Sulfuric acid (UN2796)
- **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:** Acceptable only in solutions of 25% or less acid that qualify as Limited Quantity air or surface; Packaging Instruction 8A must be followed _(unconfirmed — we could not tie this to the quote below)_

## What the source says

> Sulfuric Acid (UN2796): Acceptable only in solutions of 25 percent or less acid that can qualify as a Limited Quantity air or Limited Quantity surface material.

## Source

- https://pe.usps.com/text/pub52/pub52c3_027.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/).