Hydrochloric acid min 37% a.p., reagent, applies, among others in chemical methods of quantitative analysis, e.g. alkacymetry, manganometry, in neutralization reactions, in weight analysis. It is used as a component of royal water used for digestion, in qualitative analysis, e.g. for the detection of silver cations, as well as in many basic reconnaissance reactions in analytical chemistry, consisting in the precipitation of characteristic deposits, is a valuable solvent in chemical analysis. It is also used in geology for the analysis of elements, in the chemical analysis of waters and soils.