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

For Hydrazine, cas no. is 302-01-2; pel (ppm) is 1; pel (mg/m³) is 1.3, verified against its source on 2026-08-05.

- **Substance:** Hydrazine
- **CAS No.:** 302-01-2
- **PEL (ppm):** 1
- **PEL (mg/m³):** 1.3

## What the source says

> Hydrazine | 302-01-2 | 1 | 1.3 | X |

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

> Hydrazine | 302-01-2 | 1 | 1.3 | X |

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

dir.ca.gov says pel (ppm) is **0.01**, as of 2026-08-05.

> 302012 | S | Hydrazine | 0.01 | 0.013

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


### PEL (mg/m³)

osha.gov says pel (mg/m³) is **1.3**, as of 2026-08-05.

> Hydrazine | 302-01-2 | 1 | 1.3 | X |

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

dir.ca.gov says pel (mg/m³) is **0.013**, as of 2026-08-05.

> 302012 | S | Hydrazine | 0.01 | 0.013

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/).