1,2-Dichloroethylene — CAS 540-59-0 — workplace exposure limit
What is the pel (ppm) for 1,2-Dichloroethylene — CAS 540-59-0 — workplace exposure limit?
For 1,2-Dichloroethylene, pel (ppm) is 200; pel (mg/m³) is 790; cas no. is 540-59-0, verified against its source on 2026-08-05.
1,2-Dichloroethylene | 540-59-0 | 200 | 790 | - |
— osha.gov, retrieved 2026-08-05
200
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
- 1,2-Dichloroethylene verified
- CAS No.
- 540-59-0 verified
- PEL (ppm)
- 200 verified
- PEL (mg/m³)
- 790 verified
- NIOSH REL (ppm)
- TWA 200 per cdc.gov
- NIOSH REL (mg/m³)
- 790 per cdc.gov
What cdc.gov says
NIOSH REL TWA 200 ppm (790 mg/m3)
— cdc.gov, retrieved 2026-09-08
Substance
CDC - NIOSH Pocket Guide to Chemical Hazards - 1,2-Dichloroethylene
CAS No.
CAS No. 540-59-0
What dir.ca.gov says
540590 | | 1,2-Dichloroethylene; acetylene dichloride | 200 | 790
— dir.ca.gov, retrieved 2026-08-05
What dir.ca.gov says
540590 | | Acetylene dichloride; see 1,2-Dichloroethylene
— dir.ca.gov, retrieved 2026-08-05
Sources
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0195.html
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html