stpp,caustic soda,zinc oxide

White powder, melting point 622 ℃, soluble in water, of calcium and magnesium and other metal ions have significant chelation ability to soften hard water, so that suspension into solution, there is weak alkaline, non-corrosive, is an inorganic surfactants, lubricants and fat to have a strong role in the emulsification.
Caustic soda

Pure anhydrous sodium hydroxide is white translucent, crystalline solid. It was strongly alkaline aqueous solution with alkali all perforating. Purely solid caustic soda is white, there is massive, flakes, solid, and granular.
Zinc Oxide
Hexagonal crystal of white or powder, no smell, be insoluble in water , alcohol , dissolve in acid , sodalye aqueous solution , ammonium chloride.