# Empty compressed gas containers — used — Postal shipping restrictions by item category

For Empty compressed gas containers, item category is Empty compressed gas containers — used; carrier is USPS; restriction type is restricted; scope is all mail; conditions is Mailable under same restrictions as when filled, because residual amounts of hazardous material might remain, recorded from its source on 2026-08-04.

- **Item category:** Empty compressed gas containers — used _(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:** all mail _(our reading, not quoted from the source)_
- **Conditions:** Mailable under same restrictions as when filled, because residual amounts of hazardous material might remain

## What the source says

> Empty, used containers are mailable under the same restrictions as when filled (because residual amounts of the hazardous material might remain present).

## 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/).