... or with faint characteristic odor. It is insoluble in water, alkali, acid and common organic solvents. It has strong ... (PVPP-R & PVPP-F)Product nameWater%Water-solublesubstances%NVPppmPH value(1% water)Heavy metalppmNitrogen%Residue onignition%Remarks PVPP-FPVPP-R ... , PVP is opposite. PVPP has good physiological security, water absorption, insolubility and complexation capabilities.It can be widely ...