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Disodium hydrogen phosphate |
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Executive standard: |
HG/T2767-1996 |
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Molecular formula: |
Na2HPO4·XH2O(X=0, 2) |
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Molecular weight: |
358.0 |
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Property: |
White powder, or colorless powder or colorless quicksand crystal; dissolving in water, insoluble in ethanol and the water solution is alkali. |
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Application: |
It is mainly used as the flammable retardant of wood, paper and fabric, boiler softening agent, dyeing agent, food additive, acid and alkali buffering agent, glaze, welding powder, galvanization, tannage or producing pyrophosphate. |
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Packing: |
Woven bag lined with plastic film, net weight 25, 50kg, storing in ventilated and dry place. |
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Quality standard:
| No. |
Item |
Index |
| A |
|
| Dihydrate disodium hydrogen phosphate |
Waterless disodium hydrogen phosphate |
Dihydrate disodium hydrogen phosphate |
Waterless disodium hydrogen phosphate |
| 1 |
Content(calculated Na2HPO4·XH2O)% = |
98.0 |
98.0 |
98.0 |
98.0 |
| 2 |
PH value(1% water solution) |
8.8-9.2 |
8.5-10 |
8.8-9.2 |
8.5-10 |
| 3 |
Water insoluble = |
0.05 |
0.05 |
0.05 |
0.05 |
| 4 |
Heavy metal(calsulated Pb)= |
...... |
...... |
0.001 |
0.001 |
| 5 |
Arsenic(calculated As)= |
...... |
...... |
0.0003 |
0.0002 |
| 6 |
Fluoride(calculated F)= |
...... |
...... |
0.005 |
0.005 |
| 7 |
Sulphate(calculated SO2-4)= |
0.7 |
...... |
0.25 |
...... |
| 8 |
Iron(Fe)= |
0.05 |
0.05 |
0.015 |
0.015 |
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