·molecular formula : Na2.SO3
·M.W :126.04
·Basic Characteristics : Colorless, single-crystal or powder ramps, soluble in water, do not dissolve in alcohol, etc.
·Quality Standards :
A :Sodium sulfite (single-crystal )
·M.W :126.04
·Basic Characteristics : Colorless, single-crystal or powder ramps, soluble in water, do not dissolve in alcohol, etc.
·Quality Standards :
A :Sodium sulfite (single-crystal )
|
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High-class products
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First-class products
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Conforming products
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Purity(Na2.SO3 ), %, ≥
|
99.0
|
98.5
|
98.0
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Water, %, ≤
|
1.4
|
2.0
|
2.5
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Purity (Nacl ) ,%, ≤
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0.10
|
0.17
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--
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Water insoluble,%, ≤
|
0.05
|
0.06
|
0.10
|
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Purity (sodium nitrate ),%, ≤
|
0.80
|
1.00
|
1.90
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?B:sodium sulfite (powder )
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Name of indicators |
indicators
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||
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High-class products
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First-class products
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Conforming products
|
|
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Na2.SO3, %,≥
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97.0
|
96.0
|
93.0
|
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Fe ,%, ≤
|
0.003
|
0.005
|
0.01
|
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Water insoluble,%, ≤
|
0.02
|
0.03
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0.05
|
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Na2CO3, %, ≤
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0.10
|
0.40
|
0.60
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Na2SO4, %,≤
|
2.5
|
--
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--
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NaCl, %,≤
|
0.10
|
--
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--
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·uses: For sulfite-cellulose acetate, sodium thiosulfate, organic medicines, such as bleach fabric, but also used as a reducing agent, preservatives, etc. to chlorine.
·Storage: Dry and hermetic
·Packing: Net weight 25Kgs or 50kgs with plastic woven bag ; Or 1000kgs big bags
·Storage: Dry and hermetic
·Packing: Net weight 25Kgs or 50kgs with plastic woven bag ; Or 1000kgs big bags