# Ammonia solution, relative density between 0.880 and 0.957 at 15° C in water, with more than 10 percent but not more than 35 percent ammonia — Postal shipping restrictions by item category

For Ammonia solution, relative density between 0.880 and 0.957 at 15° C in water, with more than 10 percent but not more than 35 percent ammonia, carrier is USPS; restriction type is restricted; scope is domestic mail (air and surface); conditions is Hazard class 8, UN2672, packing group III; domestic mail air: 8A; domestic mail surface: 8A, recorded from its source on 2026-08-10.

- **Item category:** Ammonia solution, relative density between 0.880 and 0.957 at 15° C in water, with more than 10 percent but not more than 35 percent ammonia _(verified: appears in the quote below)_
- **Carrier:** USPS _(our reading, not quoted from the source)_
- **Restriction type:** restricted _(our reading, not quoted from the source)_
- **Scope:** domestic mail (air and surface) _(our reading, not quoted from the source)_
- **Conditions:** Hazard class 8, UN2672, packing group III; domestic mail air: 8A; domestic mail surface: 8A _(verified: appears in the quote below)_

## What the source says

> Ammonia solution, relative density between 0.880 and 0.957 at 15° C in water, with more than 10 percent but not more than 35 percent ammonia 8 UN2672 III 8A 8A

## Source

- https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf

Last verified: 2026-08-10. Review by: 2027-08-10.
Part of [Postal shipping restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).