# Diphacinone — US federal chemical regulatory reporting thresholds by program (CERCLA, EPCRA, CAA)

For Diphacinone, cas no. is 82-66-6; epcra tpq (lbs) is 10/10,000; epcra rq (lbs) is 10, verified against its source on 2026-08-05.

- **Substance:** Diphacinone _(verified: appears in the quote below)_
- **CAS No.:** 82-66-6 _(verified: appears in the quote below)_
- **EPCRA TPQ (lbs):** 10/10,000 _(verified: appears in the quote below)_
- **EPCRA RQ (lbs):** 10 _(verified: appears in the quote below)_

## What the source says

> 82-66-6 | Diphacinone | | 10 | 10/10,000 |

## Source

- https://www.ecfr.gov/current/title-40/chapter-I/subchapter-J/part-355

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/).