---
type: threshold
id: carbon-dioxide
asset: workplace-exposure-limits
title: "Carbon dioxide — 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: "Carbon dioxide | 124-38-9 | 5000 | 9000 | - |"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Carbon dioxide"
cas_number: "124-38-9"
pel_ppm: "5000"
pel_mgm3: "9000"
verified: true
---
**Substance:** Carbon dioxide

**CAS No.:** 124-38-9

**PEL (ppm):** 5000

**PEL (mg/m³):** 9000

> Carbon dioxide | 124-38-9 | 5000 | 9000 | - |

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