# Selenium hexafluoride (as Se) — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Selenium hexafluoride (as Se), cas no. is 7783-79-1; pel (ppm) is 0.05; pel (mg/m³) is 0.4, verified against its source on 2026-08-05.

- **Substance:** Selenium hexafluoride (as Se)
- **CAS No.:** 7783-79-1
- **PEL (ppm):** 0.05
- **PEL (mg/m³):** 0.4

## What the source says

> Selenium hexafluoride (as Se) | 7783-79-1 | 0.05 | 0.4 | - |

## Source

- https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1

Last verified: 2026-08-05. Review by: 2027-08-05.
Part of [US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side](https://referencesource.org/workplace-exposure-limits/).