Hydrogen chloride
|
CAS
7647-01-0
|
HCl
|
RTECS
MW4025000
|
Synonyms & Trade Names
Anhydrous hydrogen chloride; Aqueous hydrogen chloride (i.e., Hydrochloric acid, Muriatic acid) [Note: Often used in an aqueous solution.]
|
DOT ID & Guide
1050 / 125 (anhydrous)
1789 / 157 (solution)
|
Exposure
Limits
|
NIOSH REL: C 5 ppm (7 mg/m3)
|
|
OSHA PEL: C 5 ppm (7 mg/m3)
|
IDLH
50 ppm
See: 7647010
|
Conversion
1 ppm = 1.49 mg/m3
|
Physical Description
Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]
|
MW: 36.5
|
BP: -121°F
|
FRZ: -174°F
|
Sol(86°F): 67%
|
VP: 40.5 atm
|
IP: 12.74 eV
|
RGasD: 1.27
|
|
Fl.P: NA
|
UEL: NA
|
LEL: NA
|
|
|
Nonflammable Gas
|
Incompatibilities & Reactivities
Hydroxides, amines, alkalis, copper, brass, zinc [Note: Hydrochloric acid is highly corrosive to most metals.]
|
Measurement Methods
NIOSH 7903; OSHA ID174SG
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact (solution)/Frostbite
Eyes: Prevent eye contact/Frostbite
Wash skin: When contaminated (solution)
Remove: When wet or contaminated (solution)
Change: No recommendation
Provide: Eyewash (solution), Quick drench (solution), Frostbite wash
|
First Aid (See procedures)
Eye: Irrigate immediately (solution)/Frostbite
Skin: Water flush immediately (solution)/Frostbite
Breathing: Respiratory support
Swallow: Medical attention immediately (solution)
|
Respirator Recommendations
NIOSH/OSHA
Up to 50 ppm:
(APF = 10) Any chemical cartridge 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 = 25) Any powered, air-purifying respirator with cartridge(s) 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 acid gas canister/Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
|
Exposure Routes
inhalation, ingestion (solution), skin and/or eye contact
|
Symptoms
Irritation nose, throat, larynx; cough, choking; dermatitis; solution: eye, skin burns; liquid: frostbite; in animals: laryngeal spasm; pulmonary edema
|
Target Organs
Eyes, skin, respiratory system
|
|
See also: INTRODUCTION
See ICSC CARD: 0163 See MEDICAL TESTS: 0116
|
