# Hydrazine, aqueous solution with not more than 37 percent hydrazine, by mass — Postal shipping restrictions by item category

For Hydrazine, aqueous solution with not more than 37 percent hydrazine, by mass, carrier is USPS; restriction type is restricted; scope is domestic mail (air and surface); conditions is Hazard class 6.1, UN3293, packing group III; domestic mail air: 6A; domestic mail surface: 6A, recorded from its source on 2026-08-10.

- **Item category:** Hydrazine, aqueous solution with not more than 37 percent hydrazine, by mass _(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 6.1, UN3293, packing group III; domestic mail air: 6A; domestic mail surface: 6A _(verified: appears in the quote below)_

## What the source says

> Hydrazine, aqueous solution with not more than 37 percent hydrazine, by mass 6.1 UN3293 III 6A 6A

## 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/).