Description
Technical Bulletin
Synonym: Sulfurous Acid, Disodium Salt
Chemical Name: Sulfurous acid, Disodium salt
Chemical Formula: Na2So3
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ANALYTICAL PROPERTIES
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PHOTO GRADE Sodium Sulphite
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SODIUM SULPHITE WT%
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98.5 MIN
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SODIUM SULPHATE WT%
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1.5 MAX
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SODIUM CHLORIDE WT%
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0.10 MAX
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SODIUM CARBONATE WT%
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0.1 MAX
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MOISTURE %
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0.05 MAX
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INSOLUBLES %
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0.1 MAX
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IRON(Fe) PPM
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5 MAX
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HEAVY METALS(Pb) PPM
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10 MAX
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Sodium Metabisulfite also called Sodium disulfite, disodium pentaoxodisulfate, disodium pyrosulfite.
Sodium Metabisulphite C.A.S. number is 7681-57-4 and its Chemical formula. Na2S2O5 and molecular weight is 190.11
Label
It is primarily used in pulp and paper industry. It is used in water treatment as an oxygen scavenger agent, in the photographic industry to protect developer solutions from oxidation, in textile industry as a bleaching, as a desulfurising and as a dechlorinating agent and in leather trade for the sulfitisation of tanning extracts. It is used in chemical manufacturing as a sulfonation and sulfomethylation agent. It is used in the production of rubber chemicals, sulfur dyes and other chemical compounds. It is used in other applications including ore flotation, oil recovery, food preservative, making dyes, and detergent.
LABEL PROPERTY
