# Hydrogen fluoride/Hydrofluoric acid (conc 50% or greater) [Hydrofluoric acid] — OSHA PSM vs EPA RMP: chemical threshold quantities side by side

For Hydrogen fluoride/Hydrofluoric acid (conc 50% or greater) [Hydrofluoric acid], cas no. is 7664-39-3; epa rmp tq (lbs) is 1,000; rmp category is toxic; rmp basis for listing is a, b, recorded from its source on 2026-08-15.

- **Substance:** Hydrogen fluoride/Hydrofluoric acid (conc 50% or greater) [Hydrofluoric acid] _(verified: appears in the quote below)_
- **CAS No.:** 7664-39-3 _(verified: appears in the quote below)_
- **EPA RMP TQ (lbs):** 1,000 _(verified: appears in the quote below)_
- **RMP category:** toxic _(our reading, not quoted from the source)_
- **RMP basis for listing:** a, b _(verified: appears in the quote below)_

## What the source says

> Hydrogen fluoride/Hydrofluoric acid (conc 50% or greater) [Hydrofluoric acid] | 7664-39-3 | 1,000 | a, b

## Source

- https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130

Last verified: 2026-08-15. Review by: 2027-08-15.
Part of [OSHA PSM vs EPA RMP: chemical threshold quantities side by side](https://referencesource.org/psm-rmp-chemical-threshold-crossref/).