# Butene — OSHA PSM vs EPA RMP: chemical threshold quantities side by side

For Butene, cas no. is 25167-67-3; epa rmp tq (lbs) is 10,000; rmp category is flammable; rmp basis for listing is f, recorded from its source on 2026-08-15.

- **Substance:** Butene _(verified: appears in the quote below)_
- **CAS No.:** 25167-67-3 _(verified: appears in the quote below)_
- **EPA RMP TQ (lbs):** 10,000 _(verified: appears in the quote below)_
- **RMP category:** flammable _(our reading, not quoted from the source)_
- **RMP basis for listing:** f _(verified: appears in the quote below)_

## What the source says

> Butene | 25167-67-3 | 10,000 | f

## 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/).