What is PVP-K / Polyvinyl pyrrolidone/ Povidone K?

PVP-K series exist as powder or aqueous solution. It dissolves in water or various organic solvents and is generally used in cosmetics, surfactants, pharmacy and other industrial fields. Powder or aqueous solution,diffluent in water,alcohol,amine and halohydrocarbn,but is not dissolved in acetone and aether etc..It has good solubility,biocompatibility,and physiologically inert,film-forming character,colloid protect ability and compound ability to many organic or inorganic compounds.