We are a professional factory specializing in caustic soda manufacturing. We can provide caustic soda flakes and pearls, including the specs 99%, 96%, 98%. We also can offer you any packaging. We can supply caustic soda flakes with following specs: CAS: 1310-73-2 Dangerous grade: 8 Appearance: Crystal White Assay as NaOH: 99% Chlorides as Nacl: 0.08% max Carbonate as Na2CO3: 0.9% max Iron as Fe: 40 ppm max We can supply caustic soda pearls/beads/prills with following specs: CAS: 1310-73-2 Dangerous grade: 8 Appearance: Crystal White Assay as NaOH: 99% Chlorides as Nacl: 0.15% max Carbonate as Na2CO3: 0.9% max Iron as Fe: 30 ppm max