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Sodium sulfate
Appearance: Powder or granules of white color, grayish tint is allowed.
Application: Sodium sulfate is to be used in the textile, chemical and glass industries.
Packaging: The product is packed into four-five-layer non-impregnated paper bags of types NM or BM as per TDS-2226 or into plastic bags for chemical products according to TDS-17811 or TDS-30090.
The bag net weight capacity must not exceed 50 kg. 650-700 kg big-bags.
Marking: Transportation marking must be as per TDS-14192 with the application of a handling inscription “Keep Dry” and other additional data describing the product.
Transportation: By all modes of land and sea transport in accordance with the cargo traffic rules in force applicable to the certain type of transport.
Storage: Sodium sulphate packed in bags and delivered in bulk must be stored in a covered storage facility.
Physical and chemical features:
Parameter name |
Rate as per the grade |
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Grade А |
Grade B |
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Extra |
First |
Second |
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1. Appearance |
Powder or granules of white color, grayish tint is allowed |
Powder of white color, grayish tint is allowed |
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Mass fraction of sodium sulphate (Na2SO4),%, min |
99,4 |
98 |
97 |
94 |
Mass fraction of water-insoluble residue, %, max |
0,4 |
0,9 |
1,2 |
4,5 |
Mass fraction of chlorides in terms of sodium chloride (NaСl), %, max |
0,2 |
0,7 |
1,2 |
2,0 |
Mass fraction of calcium sulphate (СaSO4), %, max |
Not rated |
1,0 |
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Mass fraction of magnesium ions (Mg2+), %, max |
0,02 |
0,1 |
0,2 |
Not rated |
Mass fraction of iron (Fe2O3), %, max |
0,010 |
0,015 |
0,03 |
0,03 |
Mass fraction of water, %, max |
0,1 |
1,0 |
4,0 |
7,0 |
Note:
1. The rates indicated in subparagraphs 2-7 of the table are given in terms of dry product.
2. The Extra quality sodium sulphate intended for the production of synthetic detergents with min 60% whiteness and water-insoluble residue content max 0.2% and calcium sulphate max 0.04
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