---
type: threshold
id: 1-1-dimethylhydrazine
asset: workplace-exposure-limits
title: "1,1-Dimethylhydrazine — 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: "1,1-Dimethylhydrazine | 57-14-7 | 0.5 | 1 | X |"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "1,1-Dimethylhydrazine"
cas_number: "57-14-7"
pel_ppm: "0.5"
pel_mgm3: "1"
verified: true
---
**Substance:** 1,1-Dimethylhydrazine

**CAS No.:** 57-14-7

**PEL (ppm):** 0.5

**PEL (mg/m³):** 1

> 1,1-Dimethylhydrazine | 57-14-7 | 0.5 | 1 | X |

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