Potassium Chloride Potassium Chloride offered comprise white cubic crystalline powder that is made available with relative density of 1.988 and melting point of 771aa. Having solubility in water and insolubility in ethyl ether and acetone, it finds suitability for use as chemical reagent, as buffer agent and chromatographic analytical reagent. Some of its properties include molecular formula of KCl; arsenic(base on As) of 3mgkg; heavy metal(base on Pb) of 5mgkg; use as a nutrition supplementing agent; flavoring agent ; pH control agent among others.