Hydrogen fluoride |
Synonyms & Trade Names Anhydrous hydrogen fluoride; Aqueous hydrogen fluoride (i.e., Hydrofluoric acid); HF-A |
CAS No. 7664-39-3 |
RTECS No. MW7875000 |
DOT ID & Guide 1052 125 (anhydrous)
1790 157 (solution) |
FormulaHF |
Conversion 1 ppm = 0.82 mg/m3 |
IDLH 30 ppm
See: 7664393 |
Exposure Limits NIOSH REL: TWA 3 ppm (2.5 mg/m3) C 6 ppm (5 mg/m3) [15-minute]
OSHA PEL†: TWA 3 ppm |
Measurement Methods
NIOSH 3800 , 7902 , 7903 , 7906;
OSHA ID110
See: NMAM or OSHA Methods |
Physical Description Colorless gas or fuming liquid (below 67°F) with a strong, irritating odor. [Note: Shipped in cylinders.] |
MW: 20.0 |
BP: 67°F |
FRZ: -118°F |
Sol: Miscible |
VP: 783 mmHg |
IP: 15.98 eV |
Sp.Gr: 1.00 (Liquid at 67°F) |
Fl.P: NA |
UEL: NA |
LEL: NA |
RGasD: 0.69 |
|
| Nonflammable Gas |
Incompatibilities & Reactivities Metals, water or steam [Note: Corrosive to metals. Will attack glass and concrete.] |
Exposure Routes inhalation, skin absorption (liquid), ingestion (solution), skin and/or eye contact |
Symptoms irritation eyes, skin, nose, throat; pulmonary edema; eye, skin burns; rhinitis; bronchitis; bone changes |
Target Organs Eyes, skin, respiratory system, bones |
|
Personal Protection/Sanitation (See protection codes)
Skin: Prevent skin contact (liquid)
Eyes: Prevent eye contact (liquid)
Wash skin: When contaminated (liquid)
Remove: When wet or contaminated (liquid)
Change: No recommendation
Provide: Eyewash (liquid), Quick drench (liquid) |
First Aid (See procedures)
Eye: Irrigate immediately (solution/liquid)
Skin: Water flush immediately (solution/liquid)
Breathing: Respiratory support
Swallow: Medical attention immediately (solution) |
Respirator Recommendations NIOSH/OSHA Up to 30 ppm:
(APF = 10) Any chemical cartridge respirator with cartridge(s) providing protection against the compound of concern*
(APF = 25) Any powered, air-purifying respirator with cartridge(s) providing protection against the compound of concern*
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern
(APF = 10) Any supplied-air respirator*
(APF = 50) Any self-contained breathing apparatus with a full facepiece Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern
Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 0283 See MEDICAL TESTS: 0118 |
