Hydrogen Chloride

CAS RN: 7647-01-0

Major Uses

For hydrochloric acid (USEPA/OPP Pesticide Code: 045901) ACTIVE products with label matches. /SRP: Registered for use in the U.S. but approved pesticide uses may change periodically and so federal, state and local authorities must be consulted for currently approved uses./
In the production of chlorides; refining ore in the production of tin and tantalum; for the neutralization of basic systems; as laboratory reagent; hydrolyzing of starch and proteins in the preparation of various food products; pickling and cleaning of metal products; as catalyst and solvent in organic syntheses. Also used for oil- and gas-well treatment and in removing scale from boilers and heat-exchange equipment. Trace metal analysis. Titrant; acidification; digestion. Pharmaceutic aid (acidifier). /Hydrochloric acid/
In the manufacture of pharmaceutical hydrochlorides, vinyl chloride from acetylene, alkyl chlorides from olefins, and arsenious chlorides from arsenious oxide. In the chlorination of rubber, as a gaseous flux for babbitting operations. In organic reactions involving isomerization, polymerization, and alkylation. For making chlorine where economical. /Hydrogen chloride/
Occassionally used in treating phosphate rock in the manufacture of phosphoric acid and in the production of ammonium chloride. /Hydrochloric acid/
Tuberculocide, disinfectant (bactericide/germicide/purifier, limited, general or broad-spectrum, hospital or medical), sanitizer, virucide, fungicide/fungistat, and microbicide/microbiostat (slime-forming bacteria).
Metal treating agent (steel pickling); used to increase oil well output; in neutralization of waste streams; in food processing as a starch modifier; in manufacture of sodium glutamate; in manufacture of gelatin; in conversion of cornstarch to syrup; in the brewing industry; in sugar refining; as chem intermed; in ore treatment.
Acidizing (activation) of petroleum wells, boiler scale removal, chemical intermediate, ore reduction, food processing (corn syrup, sodium glutamate), pickling and metal cleaning, industrial acidizing, general cleaning, e.g. of membrane in desalination plants, alcohol denaturant; laboratory reagent. /Hydrochloric acid/
Production of vinyl chloride from acetylene and alkyl chlorides from olefins, hydrochlorination, polymerization, isomerization, alkylation, and nitration reactions. /Hydrogen chloride gas/
... In manufacture of fertilizers, dyes and dyestuffs, artificial silk and pigments for paints and in the refining of edible oils and fats, electroplating, leather tanning, ore refining, in the photographic industry, soap refining, textile industry, rubber industry, petroleum extraction, pickling of metals, etc. /Hydrochloric acid/.
... Hydrochloric acid with ethanol /has been used for the production of ethyl chloride/.
Clean & prepare other metals for coatings; recovery of zinc from galvanized iron scrap; production of chloride chemicals.
Leather deliming/tanning agent; industrial cleaning agent; ion-exchange resin regeneration (water treatment, chemical purification); pH control (water treatment); alcohol chlorination reagent; animal glue production; sugar/oils/fats/wax refining agent; textile scouring agent
Aqueous hydrochloric acid has many uses as a strong inorganic acid: manufacture of chlorides, dissolution of minerals, pickling and etching of metals, regeneration of ion-exchange resins for water treatment, neutralization of alkaline products or waste materials, acidification of brine in chlor-alkali electrolysis, and many others.
Hydraulic fracturing uses a specially blended liquid which is pumped into a well under extreme pressure causing cracks in rock formations underground. These cracks in the rock then allow oil and natural gas to flow, increasing resource production. ... Although there are dozens to hundreds of chemicals which could be used as additives, there are a limited number which are routinely used in hydraulic fracturing. ... Chemical Name: Hydrochloric acid; Chemical Purpose: Helps dissolve minerals and initiate cracks in the rock; Product Function: Acid. /Hydrochloric acid/
Hydrochloric acid has been identified as being used in hydraulic fracturing as a pH adjuster. /From table/
Both oil base and water base fracturing fluids are being used in the fracturing industry. Water base, which includes alcohol-water mixtures and low strength acids, make up the majority of treating fluids. The common chemicals added to these fluids are polymers for viscosity development, crosslinkers for viscosity enhancement, pH control chemicals, gel breakers for polymer degradation following the treatment, surfactants, clay stabilizers, alcohol, bactericides, fluid loss additives and friction reducer. /Hydraulic fracturing/
Medication (vet)
The largest proportion of hydrogen chloride is used immediately by the producer ... because the hydrogen chloride byproduct of organic chlorination processes has to be used as completely as possible. This is done by means of oxychlorination or hydrochlorination, or to a small extent, recovery of chlorine (e.g., by the KEL process, a modified Deacon process or by electrolysis of hydrochloric acid).
Find more information on this substance at: PubChem, PubMed