---
type: threshold
id: dimethyl-sulfate
asset: workplace-exposure-limits
title: "Dimethyl sulfate — 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: "Dimethyl sulfate | 77-78-1 | 1 | 5 | X |"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Dimethyl sulfate"
cas_number: "77-78-1"
pel_ppm: "1"
pel_mgm3: "5"
verified: true
---
**Substance:** Dimethyl sulfate

**CAS No.:** 77-78-1

**PEL (ppm):** 1

**PEL (mg/m³):** 5

> Dimethyl sulfate | 77-78-1 | 1 | 5 | X |

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