# Acetone — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Acetone, cas no. is 67-64-1; pel (ppm) is 1000; pel (mg/m³) is 2400, verified against its source on 2026-08-05.

- **Substance:** Acetone
- **CAS No.:** 67-64-1
- **PEL (ppm):** 1000
- **PEL (mg/m³):** 2400

## What the source says

> Acetone | 67-64-1 | 1000 | 2400 | - |

## Sources disagree

More than one authority states this, and they do not state the same
thing. Both are reproduced with the source each came from.

### PEL (ppm)

osha.gov says pel (ppm) is **1000**, as of 2026-08-05.

> Acetone | 67-64-1 | 1000 | 2400 | - |

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

dir.ca.gov says pel (ppm) is **500**, as of 2026-08-05.

> 67641 | | Acetone | 500 | 1200 | 3000 ppm | 750 | 1780

Source: https://www.dir.ca.gov/title8/5155.html


### PEL (mg/m³)

osha.gov says pel (mg/m³) is **2400**, as of 2026-08-05.

> Acetone | 67-64-1 | 1000 | 2400 | - |

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

dir.ca.gov says pel (mg/m³) is **1200**, as of 2026-08-05.

> 67641 | | Acetone | 500 | 1200 | 3000 ppm | 750 | 1780

Source: https://www.dir.ca.gov/title8/5155.html


## Source

- https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- https://www.dir.ca.gov/title8/5155.html

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/).