# Butane (UN1011) — Division 2.1 flammable gas — Postal shipping restrictions by item category

For Butane (UN1011), item category is Butane (UN1011) — Division 2.1 flammable gas; carrier is USPS; restriction type is restricted; scope is domestic mail via surface transportation only; conditions is Mailable via surface transportation as Limited Quantity material; must comply with quantity limits and Packaging Instruction 2A, recorded from its source on 2026-08-04.

- **Item category:** Butane (UN1011) — Division 2.1 flammable gas _(unconfirmed — we could not tie this to 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 via surface transportation only _(our reading, not quoted from the source)_
- **Conditions:** Mailable via surface transportation as Limited Quantity material; must comply with quantity limits and Packaging Instruction 2A

## What the source says

> Butane (UN1011): Division 2.1 flammable gases. Butane or butane mixtures are mailable via surface transportation as Limited Quantity materials

## Source

- https://pe.usps.com/text/pub52/pub52c3_021.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/).