(1) Anhydrous Sodium Sulfate 
[New standard]: QB0105-93
[Product classification]:
Industrial anhydrous sodium sulfate are classified into three
types according to it use:
Type I: Mainly used for synthesis of detergent and vinylon.
Type II: Mainly used in industries such as dye, glass and
paper.
Type III: As industrial raw material for inorganic salts.
Provide protease and sodium metasillcate for the synthesis
of washing powder.
[Technical Requirements]:
1.Appearance: the grade A products of both type I and type
II should be white crystalline granules with no aggregation and
no mechanical impurities.
2.Industrial anhydrous sodium sulfate should meet the following
requirements:
| Item |
Value |
| Type
I |
Type
II |
| Grade
A |
Grade
A |
| sodium sulfate content, NaSO4 %> |
99.1 |
98.3 |
| water insoluble substance %< |
0.04 |
0.08 |
| calcium and magnesium content (in Mg), %< |
0.10 |
0.25 |
| chloride content (in CL), %< |
0.25 |
0.60 |
| iron(Fe) content, %< |
0.0015 |
0.008 |
| moisture, %< |
0.10 |
0.30 |
| whiteness, %< |
86 |
80 |
[Manufacture's price]: 320 yuan. |
