HYDROGEN CHLORIDE HCl
General Characteristics
Hydrogen Chloride is a colorless, corrosive, toxic, nonflammable gas with a suffocating odor. It is very irritating to the mucous membrances. Hydrogen Chloride is heavier than air, fumes strongly in moist air, and has a great affinity for water. It is shipped as a liquefied gas under its own vapor pressure.
Physical Information
Molecular Weight
36.46
Flammability Limits in air
Nonflammable
Specific Gravity,
Gas @ 70&degF(21.1&degC),
1 atm(Air=1)
1.27
Liquid Density @ Boiling Point
74.35lb/ft^3 (1191g/l)
Density, Gas @ 70&degF
(21.1&degC), 1 atm
0.094lbs/ft^3 (1.51g/l)
Specific Volume,
Gas @ 70&degF
(21.1&degC), 1 atm
10.6ft^3/lb (0.662l/g)
Melting Point @ 75.1 psia
(518 kPa)
-173.60&degF (-114.24&degC)
Boiling Point @ 1 atm
-121.2&degF (-85.1&degC)
Critical Temperature
124.5&degF (51.4&degC)
Critical Pressure
1197.7 psia (82.6 bar)
Toxicity

PEL /TLV
5 ppm
LC50
3120 ppm
IDLH
100 ppm