# Carbamic acid, (3-chlorophenyl)-, 4-chloro-2-butynyl ester — US federal chemical regulatory reporting thresholds by program (CERCLA, EPCRA, CAA)

For Carbamic acid, (3-chlorophenyl)-, 4-chloro-2-butynyl ester, cas no. is 101-27-9; cercla rq (lbs) is 10; rcra waste number is U280; regulatory categories is 4, verified against its source on 2026-08-05.

- **Substance:** Carbamic acid, (3-chlorophenyl)-, 4-chloro-2-butynyl ester _(verified: appears in the quote below)_
- **CAS No.:** 101-27-9 _(verified: appears in the quote below)_
- **CERCLA RQ (lbs):** 10 _(verified: appears in the quote below)_
- **RCRA waste number:** U280 _(verified: appears in the quote below)_
- **Regulatory categories:** 4 _(verified: appears in the quote below)_

## What the source says

> Carbamic acid, (3-chlorophenyl)-, 4-chloro-2-butynyl ester | 101-27-9 | 4 | U280 | 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/).