---
type: threshold
id: dimethyl-sulfate-methyl-sulfate
asset: workplace-exposure-limits
title: "Dimethyl sulfate; methyl sulfate — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "77781 | S | Dimethyl sulfate; methyl sulfate | 0.1 | 0.5"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Dimethyl sulfate; methyl sulfate"
pel_ppm: "0.1"
pel_mgm3: "0.5"
verified: true
---
**Substance:** Dimethyl sulfate; methyl sulfate

**PEL (ppm):** 0.1

**PEL (mg/m³):** 0.5

> 77781 | S | Dimethyl sulfate; methyl sulfate | 0.1 | 0.5

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