Caustic Soda Flakes 99% Sodium Hydroxide (NaOH) 99% CAS NO.:1310-73-2 Used in soap-making, synthetic detergent, printing Specification:(Flakes) ... .9NaCL, % ≤0.05Fe2O3,% ≤0.005ITEMSTANDARDNaOH, % ≥96.0Na2CO3,% ≤1.0NaCL, % ≤2.8Fe2O3,% ≤0.008Applications:Mainly used for soap-making,synthetic detergent ... textile industry,printing,metallurgy,artificial fiber,water treatment etc. Sodium Hydroxide Flakes 99%