# Crotonaldehyde, (E)- [2-Butenal, (E)-] — OSHA PSM vs EPA RMP: chemical threshold quantities side by side

For Crotonaldehyde, (E)- [2-Butenal, (E)-], cas no. is 123-73-9; epa rmp tq (lbs) is 20,000; rmp category is toxic; rmp basis for listing is b, recorded from its source on 2026-08-15.

- **Substance:** Crotonaldehyde, (E)- [2-Butenal, (E)-] _(verified: appears in the quote below)_
- **CAS No.:** 123-73-9 _(verified: appears in the quote below)_
- **EPA RMP TQ (lbs):** 20,000 _(verified: appears in the quote below)_
- **RMP category:** toxic _(our reading, not quoted from the source)_
- **RMP basis for listing:** b _(verified: appears in the quote below)_

## What the source says

> Crotonaldehyde, (E)- [2-Butenal, (E)-] | 123-73-9 | 20,000 | 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/).