... -73-2 Used in soap-making, synthetic detergent, printing Specification:(Flakes) 99%ITEMSTANDARDNaOH, % ≥99.0Na2CO3,% ≤0.8NaCL,% ≤0.05Fe2O3,% ≤0.005ITEMSTANDARDNaOH ... industry,printing,metallurgy,artificial fiber,water treatment etc. Sodium Hydroxide Flakes 99%