Perfluorooctane Sulfonate (PFOS)
CAS Number
1763-23-1Synonym
1-Octanesulfonic acid, 1-Perfluorooctanesulfonic acid; Heptadecafluoro-1-octanesulfonic acid; Perfluoro-n-octanesulfonic acid; Perfluoroctanesulfonic acid; Perfluoroctylsulfonic acid
Occurrence/Use
Used in surface protection products such as carpet and clothing treatments and coating for paper and cardboard packaging. They have also been used in fire-fighting foams.
California Public Health Goals Data
| Update Date: | |
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| Public Health Goal (mg/L): | 0.000001 |
| Public Health Goal Technical Support Document: |
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Notification Level
| Notification Level (μg/L): | 0.0065 (Because OEHHA’s reference levels for cancer are below the limit of quantitation of current analytical methods, OEHHA recommended the Board set the notification levels at the lowest levels that can be reliably detected using available technologies) |
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| Notification Level - Download: | final-pfoa-pfosnl082119.pdf |