Hydrogen Fluoride
CAS Number
7664-39-3Synonym
Caswell No. 484; Etching acid; HFA; Fluorohydric acid; Fluoric acid; Hydrofluoric acid; Aqueous hydrogen fluoride; EPA Pesticide Code: 45601
Occurrence/Use
Catalyst, reactive solvent; etching glass and enamel; production of refrigerants, herbicides, plastics, and electrical components
Acute RELs
| Acute REL (μg/m3): | 240 |
|---|---|
| Species: | Human |
| Acute REL Toxicologic Endpoint: | Respiratory and eye irritation |
| Acute REL Target Organs: | Respiratory system, eyes |
| Severity: | Mild |
| Last Acute REL Revision: | 1999 |
| Acute Reference Exposure Levels Comments: |
OEHHA 2008. Technical Supporting Document for Noncancer RELs, Appendix D2. Listed in Hot Spots as Fluorides including hydrogen fluoride, with separate RELs for Hydrogen Fluoride. |
Chronic REL
| Chronic Inhalation REL (μg/m3): | 14 (inhalation); 40 μg/kg BW-day (oral) |
|---|---|
| Chronic Target Organs: | Inhalation: Bone and teeth, respiratory system. Oral: Bone and teeth |
| Human Data: | Yes |
| Last Chronic REL Revision: | 2003 |
| Chronic Reference Exposure Levels Comments: |
OEHHA 2008. Technical Supporting Document for Noncancer RELs, Appendix D3. Listed in Hot Spots as Fluorides including hydrogen fluoride, with separate RELs for Hydrogen Fluoride. |