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Specifications
1.sodium hydrosulfite 2.Cas no.:7775-14-6 3.White crystalline powder 4.90.5% ,88.5% ,85.5% min 5.50kgs per drum
sodium hydrosulfite
1) Used as reducer, dyes auxiliary of dyeing industry, synthetic dyes and intermediates.
(2) Used as bleaching agent of paper pulp in paper-making industry.
(3) Used as bleaching agent of china clay in the ceramics industry.
(4) Used as deoxidizer of rubber and styrene butadiene rubber synthesis, developer in photo-taking industry.
(5) Used as reducing agent, bleaching agent in the industries including pharmacy, food, metallurgy and leather
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No.
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Index name
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Index
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Note
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90%specification
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88%specification
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85%specification
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1
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Appearance
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White crystalline powder
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White crystalline powder
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White crystalline powder
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Eye measurement
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2
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Hydros content
% ≥ |
90.5
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88.5
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85.5
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Compulsory test
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3
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Content of
insoluble substance in water % ≤ |
0.1
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0.1
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0.2
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Spot test
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4
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Content of
sodium carbonate %≥ |
1
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1
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1
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Spot test
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5
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Granularity
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A, B
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A, B, C
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A, B, C, D
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Compulsory test ( Eye measurement )
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6
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Odor
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Gentleness
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Gentleness
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Gentleness
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Compulsory test
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