Thionyl chloride — CAS 7719097 — workplace exposure limit
What is the pel (ppm) for Thionyl chloride — CAS 7719097 — workplace exposure limit?
For Thionyl chloride, pel (ppm) is 1; pel (mg/m³) is 5; ceiling notation is the values given in the PEL columns are ceiling values; cas no. is 7719097, verified against its source on 2026-09-29.
7719097 | | Thionyl chloride | 1 | 5 | C
— dir.ca.gov, retrieved 2026-09-28
1
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
- Thionyl chloride verified
- CAS No.
- 7719097 verified
- PEL (ppm)
- 1 verified
- PEL (mg/m³)
- 5 verified
- Ceiling notation
- the values given in the PEL columns are ceiling values verified
- NIOSH REL (ppm)
- C 1 per cdc.gov
- NIOSH REL (mg/m³)
- 5 per cdc.gov
Where each value comes from
The value above is stated away from the sentence quoted with the answer, so the passage that states it is shown here too.
Ceiling notation
A “C” notation in this column means the values given in the PEL columns are ceiling values.
— all from dir.ca.gov, retrieved 2026-09-28
What cdc.gov says
NIOSH REL C 1 ppm (5 mg/m3)
— cdc.gov, retrieved 2026-09-08
Substance
CDC - NIOSH Pocket Guide to Chemical Hazards - Thionyl chloride
CAS No.
CAS No. 7719-09-7
Sources
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0611.html