Dimethyl sulfate — workplace exposure limit
What is the pel (ppm) for Dimethyl sulfate — workplace exposure limit?
For Dimethyl sulfate, pel (ppm) is 1; pel (mg/m³) is 5; cas no. is 77-78-1, verified against its source on 2026-08-05.
Dimethyl sulfate | 77-78-1 | 1 | 5 | X |
— osha.gov, retrieved 2026-08-05
1
The most of this substance workplace air may legally contain, averaged over an 8-hour shift — OSHA's permissible exposure limit (PEL), in parts per million, from the agency's own table row quoted below. Where federal OSHA and Cal/OSHA disagree, both limits are stated, each with its own agency's table row as evidence. NIOSH's number, where there is one, is shown separately: it is a recommended limit, not a legal one, and it is often the strictest of the three.
- Substance
- Dimethyl sulfate verified
- CAS No.
- 77-78-1 verified
- PEL (ppm)
- 1 verified
- PEL (mg/m³)
- 5 verified
- NIOSH REL (ppm)
- TWA 0.1 per cdc.gov
- NIOSH REL (mg/m³)
- 0.5 per cdc.gov
What cdc.gov says
NIOSH REL Ca TWA 0.1 ppm (0.5 mg/m3) [skin]
— cdc.gov, retrieved 2026-09-08