Hydrogenated terphenyls — workplace exposure limit
What is the pel (ppm) for Hydrogenated terphenyls — workplace exposure limit?
For Hydrogenated terphenyls, pel (ppm) is 0.5; pel (mg/m³) is 5; cas no. is 61788327, verified against its source on 2026-08-05.
61788327 | | Hydrogenated terphenyls | 0.5 | 5
— dir.ca.gov, retrieved 2026-08-05
0.5
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
- Hydrogenated terphenyls verified
- CAS No.
- 61788327 verified
- PEL (ppm)
- 0.5 verified
- PEL (mg/m³)
- 5 verified
- NIOSH REL (ppm)
- TWA 0.5 per cdc.gov
- NIOSH REL (mg/m³)
- 5 per cdc.gov
What cdc.gov says
NIOSH REL TWA 0.5 ppm (5 mg/m3)
— cdc.gov, retrieved 2026-09-08
Sources
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0330.html