# Dibenzo[a,h]anthracene — US federal chemical regulatory reporting thresholds by program (CERCLA, EPCRA, CAA)

For Dibenzo[a,h]anthracene, cas no. is 53-70-3; cercla rq (lbs) is 1; rcra waste number is U063; regulatory categories is 2,4, verified against its source on 2026-08-05.

- **Substance:** Dibenzo[a,h]anthracene _(verified: appears in the quote below)_
- **CAS No.:** 53-70-3 _(verified: appears in the quote below)_
- **CERCLA RQ (lbs):** 1 _(verified: appears in the quote below)_
- **RCRA waste number:** U063 _(verified: appears in the quote below)_
- **Regulatory categories:** 2,4 _(verified: appears in the quote below)_

## What the source says

> Dibenzo[a,h]anthracene | 53-70-3 | 2,4 | U063 | 1 (0.454)

## 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/).