# Benzene a — US federal chemical regulatory reporting thresholds by program (CERCLA, EPCRA, CAA)

For Benzene a, cas no. is 71-43-2; cercla rq (lbs) is 10; rcra waste number is U019; regulatory categories is 1,2,3,4, verified against its source on 2026-08-05.

- **Substance:** Benzene a _(verified: appears in the quote below)_
- **CAS No.:** 71-43-2 _(verified: appears in the quote below)_
- **CERCLA RQ (lbs):** 10 _(verified: appears in the quote below)_
- **RCRA waste number:** U019 _(verified: appears in the quote below)_
- **Regulatory categories:** 1,2,3,4 _(verified: appears in the quote below)_

## What the source says

> Benzene a | 71-43-2 | 1,2,3,4 | U019 | 10 (4.54)

## Source

- https://www.ecfr.gov/current/title-40/chapter-I/subchapter-J/part-302/section-302.4

Last verified: 2026-08-05. Review by: 2027-08-05.
Part of [US federal chemical regulatory reporting thresholds by program (CERCLA, EPCRA, CAA)](https://referencesource.org/chemical-regulatory-reporting-thresholds/).