Caustic soda Flakes Supplier in Chennai Product Description and Specifications Characteristics Value Description Caustic Soda Lye (Grade-1) Caustic Soda Lye (Grade-2) Caustic Soda Flakes Sodium Hydroxide as NaOH 47% (Min) 30.0% (Min) 97.0% (Min) (Dry Basis) Sodium Carbonate as Na2CO3 0.2% (Max) 0.20% 0.4% (Max) Chlorides as NaCl 0.015% (Max) (150 ppm) 0.015% (150 ppm) 0.05% (Max) (500 ppm) Sulphates as Na2SO4 0.002% (Max) (20 ppm) 0.002% (20 ppm) 0.005% (Max) (50 ppm) Iron as Fe 0.001% (Max) (10 ppm) 0.002% (20 ppm) 0.002% (Max) (20 ppm) Salicates as SiO2 0.002% (Max) (20 ppm) 0.001% (10 ppm) 0.005% (Max) (50 ppm) Sodium Hydroxide as NaOH on dry basis (Min) 99.50%