Hydrochloric Acid

HYDROCHLORIC ACID is a solution of the gas hydrogen chloride (HCI) in water. It varies from colourless to pale yellow according to purity. At all strengths above 10%, the acid typically evolves hydrogen chloride vapour with its characteristic sharp irritant odour.

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Detailed Description for Hydrochloric Acid

HYDROCHLORIC ACID is a solution of the gas hydrogen chloride (HCI) in water.  It varies from colourless to pale yellow according to purity.  At all strengths above 10%, the acid typically evolves hydrogen chloride vapour with its characteristic sharp irritant odour.  The amount of vapour is primarily dependent on the acids strength, but other factors such as turbulence and temperature also have an effect.  In addition the vapour may manifest itself as acid fume depending on the relative humidity. Hydrochloric acid is highly corrosive and attacks most common metals, including iron, steel and lead liberating the flammable gas hydrogen.  It will also destroy many common clothing materials.  At a strength of 20.4% HCI, the acid forms an azeotropic constant boiling mixture with a boiling point of 110 degrees centigrade.

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Hydrochloric acid is the second only to sulphuric acid in its numerous and diverse uses in manufacturing industry and synthetic chemistry including brine treatment for chloralkali, steel pickling, food, calcium chloride, oil well acidulation, chlorine, swimming pools, metal recovery , pH control, sludge removal, sand and clay purification, production sodium chlorate, metal chlorides, activated carbon andiron oxide pigments, polycarbonate  resins, bisphenol-A, polyvinyl chloride resins and synthetic glycerine.


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