Molecular Formula: Na2S
Molecular Weight: 78.04
Properties:
Flaky and brownish red; easily soluble in water, slightly soluble in alcohols, insoluble in aethers; its aqueous solution is highly basic; can be easily oxidized in the air; toxic; pure sodium sulfide is colorless crystalline powder easily soluble in water.
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Item
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GB/T10500-2000
Standard value of Class Ⅰ qualifier
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Measured value
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Sodium sulfide(Na2S)
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≥60.0
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60.32
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|
Sodium sulfite(Na2SO3)
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≤
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1.08
|
|
Sodium thiosulfate(Na2S2O3)
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≤
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0.86
|
|
Iron(Fe)
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≤0.15
|
0.10
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|
Sodium carbonate(Na2CO3)
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≤5.0
|
2.45
|
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Water insolubles
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≤0.80
|
0.30
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Used in the manufacture of sulphur dyes sulphur black and sulphur blue; as flotation agent of ores; as cooking agent of paper; also widely used in textiles, pigments and rubber industries. |
