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Chemical Sampling Information |
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| Hydrogen Fluoride (as F) |
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General Description
Synonyms: Anhydrous hydrofluoric acid; HF-A; HF
OSHA IMIS Code Number: 1460
Chemical Abstracts Service (CAS) Registry Number: 7664-39-3
NIOSH, Registry of Toxic Effects (RTECS) Identification Number: MW7875000
Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1052 125 (anhydrous); 1790 157 (solution)
NIOSH Pocket Guide to Chemical Hazards, Hydrogen Fluoride: chemical description, physical properties, potentially hazardous incompatibilities, and more
Exposure Limits
OSHA Permissible Exposure Limit (PEL) for General Industry: 29 CFR 1910.1000 Z-2 Table -- 3 ppm, 2 mg/m3 TWA
OSHA Permissible Exposure Limit (PEL) for Construction Industry: 29 CFR 1926.55 Appendix A -- 3 ppm, 2 mg/m3 TWA
OSHA Permissible Exposure Limit (PEL) for Maritime: 29 CFR 1915.1000 Table Z-Shipyards -- 3 ppm, 2 mg/m3 TWA
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 3 ppm, 2.3 mg/m3 Ceiling; BEI
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 3 ppm, 2.5 mg/m3 TWA; 6 ppm, 5 mg/m3 (15 Minutes) Ceiling
Health Factors
NIOSH Immediately Dangerous To Life or Health Concentration (IDLH): 30 ppm
Potential symptoms: Eye, nose, throat irritation; hemorrhagic pulmonary edema; skin, eye burns; nasal congestion; bronchitis, dyspnea, inadequate oxygenation of the blood; hypocalcemia; cardiac arrhythmia; SKIN ABS: pain (sometimes delayed); INGES ACUTE: nausea, vomiting, diarrhea, abdominal pain; hypocalcemia, acidosis, hemorrhagic gastritis and pulmonary edema; CHRONIC: abnormalities of bone and teeth (fluorosis)
Health Effects: Irritation-Eye, Nose, Throat, Skin---Marked (HE14); Acute lung damage (HE11); Acute toxicity---Ventricular fibrillation (HE4); Cumulative bone damage (HE3)
Affected organs: Eyes, respiratory system, skin, bone
Date Last Revised: 06/10/2003
Literature Basis:
- (acute effects)
Bertolini, J.C.: Hydrofluoric acid: a review of toxicity. J. Emerg. Med. 10(2): 163-168, 1992.
- Kono, K., Watanabe, T., Dote, T., Usuda, K., Nishiura, H., Tagawa, T., Tominaga, M., Higuchi, Y. and Onnda, M.: Successful treatments of lung injury and skin burn due to hydrofluoric acid exposure. Int. Arch. Occup. Environ. Health 73(Suppl.): S93-S97, 2000.
- Upfal, M. and Doyle, C.: Medical management of hydrofluoric acid exposure. J. Occup. Med. 32(8): 726-731, 1990.
- (chronic effects)
Nemeth, L. and Zsogon, E.: Occupational skeletal fluorosis. Baillieres Clin. Rheumatol. 3(1): 81-88, 1989.
Monitoring Methods used by OSHA
Laboratory Sampling/Analytical Method:
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sampling media: Mixed Cellulose Ester Filter (MCEF) 0.8 microns and filter spacer (SKC 225-9001) Na2CO3 Impregnated Backup Pad in a 3 piece cassette.
maximum volume: 90 Liters maximum flow rate: 1.5 L/min (TWA)
maximum volume: 22 Liters maximum flow rate: 1.5 L/min (STEL)
current analytical method: Ion Specific Electrode; ISE
method reference: OSHA Manual of Analytical Methods (OSHA ID-110)
method classification: Partially Validated
note: OSHA personnel may obtain sampling media from SLTC. Submit as a separate sample (Particulate F- on MCEF, HF on impregnated Backup Pad). The filter and filter spacer reside in one section while the impregnated backup pad is in another section of a 3 piece polystyrene cassette. The filter and backup pad should not have physical contact with one another. When analysis of a compound is requested, an analysis is performed for fluoride (F-) and reported as the compound. Hydrogen fluoride is collected on a Na2CO3 impregnated backup pad.
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