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:25k ...