Specifications: SODIUM METABISULPHITE (SMBS) S.NO CHARACTERSTICS SPESIFICATION (REF 060422) 1 Appearance White Crystalline Powder 2 Assay as S02, % w/w > 62% 3 Assay as Na2S205, % w/w > 94% 4 ph of 10% sol 4 to 5 5 Insoluble matter < 0.1% 6 iron (as Fe) < 10 ppm 7 Heavy metals NIL
