Styrene (monomer); phenylethylene — workplace exposure limit
What is the pel (ppm) for Styrene (monomer); phenylethylene — workplace exposure limit?
For Styrene (monomer); phenylethylene, pel (ppm) is 50; pel (mg/m³) is 215; ceiling is 500 ppm; cas no. is 100425, verified against its source on 2026-08-05.
100425 | S | Styrene (monomer); phenylethylene | 50 | 215 | 500 ppm | 100 | 425
— dir.ca.gov, retrieved 2026-08-05
50
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
- Styrene (monomer); phenylethylene verified
- CAS No.
- 100425 verified
- PEL (ppm)
- 50 verified
- PEL (mg/m³)
- 215 verified
- Ceiling
- 500 ppm verified
- STEL (ppm)
- 100 verified
- STEL (mg/m³)
- 425 verified
Source
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html