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Hydrogen Fluoride

CAS Number

7664-39-3

Synonym

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

Hydrogen Fluoride

Cancer Potency Information

Latest Criteria: 
Chronic Reference Exposure Levels

Air

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.

Water

California Public Health Goals Data

California PHG Comments: 

See Fluoride.