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Hydrogen Chloride -  ( HCL )

Hydrogen Chloride - ( HCL )

Hydrogen Chloride is a colorless, corrosive, toxic, nonflammable gas with a suffocating odor. It is very irritating to the mucous membranes. 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.

Specifications 

Purity , % 99.9 99.999
Oxygen  ≤10 ppmv ≤ 0.5 ppmv
Nitrogen ≤10.0  ppmv ≤ 2  ppmv
Carbon Dioxide ≤5.0 ppmv  ≤2.0 ppmv 
Carbon Monoxide ≤5.0 ppmv  ≤1.0 ppmv
Methane  ≤5.0 ppmv  ≤0.3 ppmv
Water  ≤2.0 ppmv  ≤1.0 ppmv
Iron
≤1.0 



Ship

DOT Shipping Name  Hydrogen Chloride, Anhydrous
DOT Classification 2.3
DOT Label  Poison Gas Inhalation Hazard Corrosive Gas 
UN Number  UN 1050
CAS No. 7647-01-0
CGA/DISS/JIS/BS341/DIN477 330/634/W26-14R/NO.6/NO.8
Shipped as  Liquefied Gas



Technical Information

Cylinder State @ 21.1°C  Liquid
Flammable Limits In Air  Non-flammable 
Auto Ignition Temperature (°C ) -
Molecular Weight (g/mol) 36.461
Specific gravity (air =1) 1.19
Critical Temperature ( °C ) 51.54
Critical Pressure ( psig ) 1185



Applications

· In the electronics industry as carrier for non-volatile elements and in selective etching
· In semiconductor fabrication: etching of native oxide prior to epitaxial deposition; CVD reactor cleaning, moisture getter in CVD oxides.


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