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

For Dimethylamine, cas no. is 124-40-3; pel (ppm) is 10; pel (mg/m³) is 18, verified against its source on 2026-08-05.

- **Substance:** Dimethylamine
- **CAS No.:** 124-40-3
- **PEL (ppm):** 10
- **PEL (mg/m³):** 18

## What the source says

> Dimethylamine | 124-40-3 | 10 | 18 | - |

## 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 **10**, as of 2026-08-05.

> Dimethylamine | 124-40-3 | 10 | 18 | - |

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

dir.ca.gov says pel (ppm) is **5**, as of 2026-08-05.

> 124403 | | Dimethylamine | 5 | 9.2 | | 15 | 27.6

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


### PEL (mg/m³)

osha.gov says pel (mg/m³) is **18**, as of 2026-08-05.

> Dimethylamine | 124-40-3 | 10 | 18 | - |

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

dir.ca.gov says pel (mg/m³) is **9.2**, as of 2026-08-05.

> 124403 | | Dimethylamine | 5 | 9.2 | | 15 | 27.6

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/).