UseIn 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 prepn
of various food products; pickling and Cleaning of metal products;
as catalyst and solvent in organic syntheses. Also used for oil-
and gas-well treament and in removing scale from boilers and
heat-exchange equipment. Pharmaceutic aid (acidifier).