# Ethyl Methyl Ketone Peroxide (also Methyl Ethyl Ketone Peroxide; concentration >60%) — OSHA PSM vs EPA RMP: chemical threshold quantities side by side

For Ethyl Methyl Ketone Peroxide (also Methyl Ethyl Ketone Peroxide; concentration >60%), cas no. is 1338-23-4; osha psm tq (lbs) is 5000, verified against its source on 2026-08-15.

- **Substance:** Ethyl Methyl Ketone Peroxide (also Methyl Ethyl Ketone Peroxide; concentration >60%) _(verified: appears in the quote below)_
- **CAS No.:** 1338-23-4 _(verified: appears in the quote below)_
- **OSHA PSM TQ (lbs):** 5000 _(verified: appears in the quote below)_

## What the source says

> Ethyl Methyl Ketone Peroxide (also Methyl Ethyl Ketone Peroxide; concentration >60%) | 1338-23-4 | 5000

## Source

- https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA

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/).