1) Purity 99% min,white crystal flakes 2) We accept BV or SGS ... products, like caustic soda in different purities and appearances (96%,99% and flakes, solid,peals); anhydrous sodium sulfite, sodium bisulfite, ... If ... , medicament, oil-refining and making synthetic fiber, plastics, etc. ITEMSSTANDARDRESULTSNaOH %≥99.0099.30Na2CO3 %≤0.900.40NaCL %≤ 0.150.03Fe2O3 %≤ 0.0050 ...