Caustic Soda NaOH 99.6% NaCL 0.01% Na2CO3 0.3% Fe2O3 0.002% Caustic Soda is basic chemical raw material. It is widely used in petroleum, textile, light industry, chemical industry, papermaking, plastic, and metallurgical industry and so on. ItemStandardResultsSodium Hydroxide (NaOH) Assay≥99.0%99.6%NaCL≤0.03%0.01%Sodium Carbonate (Na2CO3) Assay≤0.50.3Fe2O3≤0.0050.002% Caustic Soda