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

For Potassium Cyanide, cas no. is 151-50-8; epcra tpq (lbs) is 100; epcra rq (lbs) is 10, verified against its source on 2026-08-05.

- **Substance:** Potassium Cyanide _(verified: appears in the quote below)_
- **CAS No.:** 151-50-8 _(verified: appears in the quote below)_
- **EPCRA TPQ (lbs):** 100 _(verified: appears in the quote below)_
- **EPCRA RQ (lbs):** 10 _(verified: appears in the quote below)_
- **CERCLA RQ (lbs):** 10 _(per ecfr.gov, not stated by the source above)_
- **RCRA waste number:** P098 _(per ecfr.gov, not stated by the source above)_
- **Regulatory categories:** 1,4 _(per ecfr.gov, not stated by the source above)_

## What the source says

> 500/10,000 | 151-50-8 | Potassium Cyanide | a | 10 | 100 |

## What ecfr.gov says

> Potassium cyanide K(CN) | 151-50-8 | 1,4 | P098 | 10 (4.54)

Source: https://www.ecfr.gov/current/title-40/chapter-I/subchapter-J/part-302/section-302.4

## Source

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