 Because of the increased stability and water-solubility of the protonated form, dopamine is supplied for chemical or pharmaceutical use as dopamine hydrochloride—that is, the hydrochloride salt that is created when dopamine is combined with hydrochloric acid.In dry form, dopamine hydrochloride is a fine powder which is white to yellow in color.Dopamine is synthesized in a restricted set of cell types, mainly neurons and cells in the medulla of the adrenal glands.