# Mercury — Postal shipping restrictions by item category

For Mercury, carrier is USPS; restriction type is prohibited; scope is US Mail; conditions is Liquid mercury in any amount (and devices containing a visible amount of mercury) is prohibited from the US Mail, so you must find another carrier, recorded from its source on 2026-08-03.

- **Item category:** Mercury
- **Carrier:** USPS _(our reading, not quoted from the source)_
- **Restriction type:** prohibited _(our reading, not quoted from the source)_
- **Scope:** US Mail _(our reading, not quoted from the source)_
- **Conditions:** Liquid mercury in any amount (and devices containing a visible amount of mercury) is prohibited from the US Mail, so you must find another carrier.

## What the source says

> Liquid mercury in any amount (and devices containing a visible amount of mercury) is prohibited from the US Mail, so you must find another carrier.

## Source

- https://www.usps.com/ship/shipping-restrictions.htm

Last verified: 2026-08-03. Review by: 2027-08-03.
Part of [Postal shipping restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).