# Selenium Hexafluoride — OSHA PSM vs EPA RMP: chemical threshold quantities side by side For Selenium Hexafluoride, cas no. is 7783-79-1; osha psm tq (lbs) is 1000, verified against its source on 2026-08-15. - **Substance:** Selenium Hexafluoride _(verified: appears in the quote below)_ - **CAS No.:** 7783-79-1 _(verified: appears in the quote below)_ - **OSHA PSM TQ (lbs):** 1000 _(verified: appears in the quote below)_ ## What the source says > Selenium Hexafluoride | 7783-79-1 | 1000 ## Source - https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA Last verified: 2026-08-15. Review by: 2027-08-15. Part of [OSHA PSM vs EPA RMP: chemical threshold quantities side by side](https://referencesource.org/psm-rmp-chemical-threshold-crossref/).