# [1,1′-Biphenyl]-4,4′-diamine,3,3′-dimethoxy- — US federal chemical regulatory reporting thresholds by program (CERCLA, EPCRA, CAA)

For [1,1′-Biphenyl]-4,4′-diamine,3,3′-dimethoxy-, cas no. is 119-90-4; cercla rq (lbs) is 100; rcra waste number is U091; regulatory categories is 3,4, verified against its source on 2026-08-05.

- **Substance:** [1,1′-Biphenyl]-4,4′-diamine,3,3′-dimethoxy- _(verified: appears in the quote below)_
- **CAS No.:** 119-90-4 _(verified: appears in the quote below)_
- **CERCLA RQ (lbs):** 100 _(verified: appears in the quote below)_
- **RCRA waste number:** U091 _(verified: appears in the quote below)_
- **Regulatory categories:** 3,4 _(verified: appears in the quote below)_

## What the source says

> [1,1′-Biphenyl]-4,4′-diamine,3,3′-dimethoxy- | 119-90-4 | 3,4 | U091 | 100 (45.4)

## 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/).