... ) 99% CAS NO.:1310-73-2 Used in soap-making, synthetic detergent, printing Specification:(Flakes) 99%ITEMSTANDARDNaOH, % ≥99.0Na2CO3,% ≤0.8NaCL,% ≤0 ... .0Na2CO3,% ≤1.0NaCL, % ≤2.8Fe2O3,% ≤0.008Applications:Mainly used for soap-making,synthetic detergent,petroleum drilling,oil-refining,paper-making,glass ... industry,printing,metallurgy,artificial fiber,water treatment etc. Sodium Hydroxide Flakes 99%