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

For Tabun, cas no. is 77-81-6; epcra tpq (lbs) is 10; epcra rq (lbs) is 10, verified against its source on 2026-08-05.

- **Substance:** Tabun _(verified: appears in the quote below)_
- **CAS No.:** 77-81-6 _(verified: appears in the quote below)_
- **EPCRA TPQ (lbs):** 10 _(verified: appears in the quote below)_
- **EPCRA RQ (lbs):** 10 _(verified: appears in the quote below)_

## What the source says

> 77-81-6 | Tabun | b, d | 10 |

## 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/).