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SODIUM META BISULPHITE
SPECIFCIATION
 PRODUCT NAME  SODIUM METABISULPHITE
 CAS NUMBER  7681-57-4
 MOLECULAR FORMULAE  Na2S2O5
 MOLECULAR WEIGHT  190.11
 DESCRIPTION  WHITE CRYSTALLINE- FREE FLOWING POWDER
 SOLUBILITY
 A 20% SOLUTION IN DISTILLED WATER IS FAIRELY  CLEAR WITH VERY SLIGHT OPALESCENCE AND  TRACE IMPURITIES
 INSOLUBLE MATTER AND Ca Mg  AND  LESS THAN 0.5%
 NH4OH PRECIPITATE  
 THIOSULPHATE AS  Na2S2O35H2O  LESS THAN 0.1%
 IRON AS Fe  LESS THAN 0.005%
 HEAVY METALS AS Pb  LESS THAN 0.004%
 PURITY AS Na2S2O5  95.445
 
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