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.
Item
|
GB/T10500-2000
Standard value of Class Ⅰ qualifier
|
Measured value
|
Sodium sulfide(Na2S)
|
≥60.0
|
60.32
|
Sodium sulfite(Na2SO3)
|
≤
|
1.08
|
Sodium thiosulfate(Na2S2O3)
|
≤
|
0.86
|
Iron(Fe)
|
≤0.15
|
0.10
|
Sodium carbonate(Na2CO3)
|
≤5.0
|
2.45
|
Water insolubles
|
≤0.80
|
0.30
|
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. |