---
type: threshold
id: hydrogen-chloride
asset: workplace-exposure-limits
title: "Hydrogen chloride — 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: "Hydrogen chloride | 7647-01-0 | (C)5 | (C)7 | - |"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Hydrogen chloride"
cas_number: "7647-01-0"
pel_ppm: "(C)5"
pel_mgm3: "(C)7"
verified: true
---
**Substance:** Hydrogen chloride

**CAS No.:** 7647-01-0

**PEL (ppm):** (C)5

**PEL (mg/m³):** (C)7

> Hydrogen chloride | 7647-01-0 | (C)5 | (C)7 | - |

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