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

For Phosphamidon, cas no. is 13171-21-6; epcra tpq (lbs) is 100; epcra rq (lbs) is 100, verified against its source on 2026-08-05.

- **Substance:** Phosphamidon _(verified: appears in the quote below)_
- **CAS No.:** 13171-21-6 _(verified: appears in the quote below)_
- **EPCRA TPQ (lbs):** 100 _(verified: appears in the quote below)_
- **EPCRA RQ (lbs):** 100 _(verified: appears in the quote below)_

## What the source says

> 13171-21-6 | Phosphamidon | | 100 |

## 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/).