beta-Chloroprene — workplace exposure limit
What is the pel (ppm) for beta-Chloroprene — workplace exposure limit?
For beta-Chloroprene, pel (ppm) is 25; pel (mg/m³) is 90; cas no. is 126-99-8, verified against its source on 2026-08-05.
beta-Chloroprene | 126-99-8 | 25 | 90 | X |
— osha.gov, retrieved 2026-08-05
25
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
- beta-Chloroprene verified
- CAS No.
- 126-99-8 verified
- PEL (ppm)
- 25 verified
- PEL (mg/m³)
- 90 verified
- NIOSH REL (ppm)
- C 1 per cdc.gov
- NIOSH REL (mg/m³)
- 3.6 per cdc.gov
What cdc.gov says
NIOSH REL Ca C 1 ppm (3.6 mg/m3) [15-minute]
— cdc.gov, retrieved 2026-09-08