1. caustic soda pearls 99% 2. pure white appearance, very fine particle size 3. ISO 9001 certificate 4 ... Sodium Chloride (NaCl) :0.1%Max Iron (Fe):50ppmMaxAppearance: White pearls with strong corrosion.AVAILABLE PACKAGING:25kg/50lb PP woven ... regulator, alkali, impregnant’s pigment. CAUSTIC SODA PEARLS, NaOH 99%, AlkaliWhite flakes or granular or solid with strong hygroscopicity and corrosion, soluble ...