# Phenol, 2,3,4,6-tetrachloro- — US federal chemical regulatory reporting thresholds by program (CERCLA, EPCRA, CAA) For Phenol, 2,3,4,6-tetrachloro-, cas no. is 58-90-2; cercla rq (lbs) is 10; rcra waste number is See F027; regulatory categories is 4, verified against its source on 2026-08-05. - **Substance:** Phenol, 2,3,4,6-tetrachloro- _(verified: appears in the quote below)_ - **CAS No.:** 58-90-2 _(verified: appears in the quote below)_ - **CERCLA RQ (lbs):** 10 _(verified: appears in the quote below)_ - **RCRA waste number:** See F027 _(verified: appears in the quote below)_ - **Regulatory categories:** 4 _(verified: appears in the quote below)_ ## What the source says > Phenol, 2,3,4,6-tetrachloro- | 58-90-2 | 4 | See F027 | 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/).