... delivery 3. Best service NAME:PolyvinylpyrrolidoneMelting point:130oCCharacter:PVP is odorless, tasteless white powder or transparent solution ... in acetone, ethyl ether and so on. PVP solid and solution are very stable, film forming ... colloidal particles play the role of protective colloid, PVP has excellent physical inertia and biocompatibility of the ... and gloss, and so on. Polyvinylpyrrolidone