# 1-Chloro-1,2,2,2-tetrafluoroethaneor Refrigerant gas R 124 · USPS — Mailing and air-carriage restrictions by item category

For 1-Chloro-1,2,2,2-tetrafluoroethaneor Refrigerant gas R 124 · USPS, item category is 1-Chloro-1,2,2,2-tetrafluoroethaneor Refrigerant gas R 124; carrier is USPS; restriction type is restricted; scope is domestic mail (air and surface); conditions is Hazard class 2.2, UN1021, packing group n/a; domestic mail air: 2B; domestic mail surface: 2B, recorded from its source on 2026-08-30.

- **Item category:** 1-Chloro-1,2,2,2-tetrafluoroethaneor Refrigerant gas R 124 _(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 2.2, UN1021, packing group n/a; domestic mail air: 2B; domestic mail surface: 2B

## What the source says

> 1-Chloro-1,2,2,2-tetrafluoroethaneor Refrigerant gas R 124 2.2 UN1021 n/a 2B 2B

## Source

- https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf

Last verified: 2026-08-30. Review by: 2027-08-30.
Part of [Mailing and air-carriage restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).