# [1,1′-Biphenyl]-4,4′-diamine — US federal chemical regulatory reporting thresholds by program (CERCLA, EPCRA, CAA)

For [1,1′-Biphenyl]-4,4′-diamine, cas no. is 92-87-5; cercla rq (lbs) is 1; rcra waste number is U021; regulatory categories is 2,3,4, verified against its source on 2026-08-05.

- **Substance:** [1,1′-Biphenyl]-4,4′-diamine _(verified: appears in the quote below)_
- **CAS No.:** 92-87-5 _(verified: appears in the quote below)_
- **CERCLA RQ (lbs):** 1 _(verified: appears in the quote below)_
- **RCRA waste number:** U021 _(verified: appears in the quote below)_
- **Regulatory categories:** 2,3,4 _(verified: appears in the quote below)_

## What the source says

> [1,1′-Biphenyl]-4,4′-diamine | 92-87-5 | 2,3,4 | U021 | 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/).