... soda in China, We supply high quality Caustic Soda Flakes, Pearls, Solid, mainly used in Papermaking, Soap Making, Artifical Fiber ... , Priting etcHigh quality Caustic Soda Flakes, Pearls, Solid, mainly used in Papermaking, Soap Making, Artifical Fiber, ... max.0.086%Fe2O30.005% max.0.004 Caustic Soda Pearls' Spec.: ITERMUNITSPECIFICATIONResultNaOH%≥99% Na2CO3 %≤0.50% NaCl %≤0. ...