Caustic Soda Caustic Soda 99% NaOH 99% min Na2CO3 0.90% max NaCl 0.15% max Fe2O3 0.007% max Caustic Soda 96% NaOH 96% min Na2CO3 1.4% max NaCl 2.8% max Fe2O3 0.01% max Molecular formula: NaOH Appreance: Peals/ Flake/ Solid Packing: 25kg plastic bags( 3layer pp& pe) Use: Mainly used in paper making, soap making, textiles, printing & dyeing, chemical fiber, pesticides, petro-chemical, medical and food industries.