1) Purity 99% min 2) BV ,SGS,REACH 3) Free ... products, like caustic soda in different purities and appearances (96%,99% and flakes, solid,peals); anhydrous sodium sulfite, sodium bisulfite ... counted by Na2CO3 dry-basis percentage) % ≥98.8%99.21%Total amount of Alkali(counted by Na2CO3 wet- ... 's Republic of China GB210.1-2004<<INDUSTRIAL NA2CO3>>IIQUALIFIED Hot Sales! Sodium Ash Light 99% Industrial