... Appearance:Flakes 3.Purity:95.0%min,90.0%min POTASSIUM HYDROXIDE FLAKES:Specifications : Item Flake Excellent GradeFirst-rate ... Cl)0.0050.005Fe0.00050.0005Sulfate (SO42-)0.0050.005Nitrate&Nitrite (N)0.00050.0005Na0.80.8Phosphate (PO4)0.0050. ... industry, soaps, high-class detergents and cosmetic, medicine intermediate, potassium chemicals, synthetic rubber, ABS resin, food additive dyestuffs and so ...