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

For Potassium silver cyanide, cas no. is 506-61-6; cercla rq (lbs) is 1; rcra waste number is P099; regulatory categories is 4, verified against its source on 2026-08-05.

- **Substance:** Potassium silver cyanide _(verified: appears in the quote below)_
- **CAS No.:** 506-61-6 _(verified: appears in the quote below)_
- **CERCLA RQ (lbs):** 1 _(verified: appears in the quote below)_
- **RCRA waste number:** P099 _(verified: appears in the quote below)_
- **Regulatory categories:** 4 _(verified: appears in the quote below)_
- **EPCRA TPQ (lbs):** 500 _(per ecfr.gov, not stated by the source above)_
- **EPCRA RQ (lbs):** 1 _(per ecfr.gov, not stated by the source above)_

## What the source says

> Potassium silver cyanide | 506-61-6 | 4 | P099 | 1 (0.454)

## What ecfr.gov says

> 506-61-6 | Potassium Silver Cyanide | a | 1 | 500 |

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

## Source

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