---
type: threshold
id: selenium-hexafluoride-as-se
asset: workplace-exposure-limits
title: "Selenium hexafluoride (as Se) — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
source_quote: "Selenium hexafluoride (as Se) | 7783-79-1 | 0.05 | 0.4 | - |"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Selenium hexafluoride (as Se)"
cas_number: "7783-79-1"
pel_ppm: "0.05"
pel_mgm3: "0.4"
verified: true
---
**Substance:** Selenium hexafluoride (as Se)

**CAS No.:** 7783-79-1

**PEL (ppm):** 0.05

**PEL (mg/m³):** 0.4

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

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