Terphenyls — CAS 26140-60-3 — workplace exposure limit

What is the pel (ppm) for Terphenyls — CAS 26140-60-3 — workplace exposure limit?

For Terphenyls, pel (ppm) is disputed: (C)1 per osha.gov, 0.5 per dir.ca.gov; pel (mg/m³) is disputed: (C)9 per osha.gov, 5 per dir.ca.gov; cas no. is 26140-60-3, verified against its source on 2026-08-05.

Terphenyls | 26140-60-3 | (C)1 | (C)9 | - |

— osha.gov, retrieved 2026-08-05

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.

Sourceosha.gov

Verified2026-08-05

Review by2027-08-05

DatasetUS workplace chemical exposure limits: federal OSHA, Cal/OSHA and NIOSH, side by side

Substance: Terphenyls verified
CAS No.: 26140-60-3 verified
PEL (ppm): (C)1 sources disagree
PEL (mg/m³): (C)9 sources disagree
Ceiling notation: the values given in the PEL columns are ceiling values per dir.ca.gov

Sources disagree

More than one authority states this, and they do not state the same thing. Both are reproduced with the source each came from — deciding between them is yours, not ours.