# Magnesium or Magnesium alloys with more than 50 percent magnesium in pellets, turnings, or ribbons — Postal shipping restrictions by item category

For Magnesium or Magnesium alloys with more than 50 percent magnesium in pellets, turnings, or ribbons, carrier is USPS; restriction type is restricted; scope is domestic mail: surface only (air prohibited); conditions is Hazard class 4.1, UN1869, packing group III; domestic mail air: Prohibited; domestic mail surface: 4A, recorded from its source on 2026-08-10.

- **Item category:** Magnesium or Magnesium alloys with more than 50 percent magnesium in pellets, turnings, or ribbons _(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: surface only (air prohibited) _(our reading, not quoted from the source)_
- **Conditions:** Hazard class 4.1, UN1869, packing group III; domestic mail air: Prohibited; domestic mail surface: 4A _(verified: appears in the quote below)_

## What the source says

> Magnesium or Magnesium alloys with more than 50 percent magnesium in pellets, turnings, or ribbons 4.1 UN1869 III Prohibited 4A

## 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/).