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Disodium Phosphate |
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Disodium hydrogen phosphate is easily weathered in the air. When placed in the air at room temperature, it loses about 5 crystalline water and forms heptahydrate. When heated to 100 ℃, it loses all crystal water and becomes anhydrous. At 250 ℃, it decomposes into sodium pyrophosphate. It is easy to be weathered in the air, and it is easy to lose five molecular crystal water to form heptahydrate (na2hpo4.7h2o). It is soluble in water and insoluble in alcohol. The pH of 0.1-1n solution is about 9.0. At 100 ℃, the crystal water is lost and anhydrous substance is formed. At 250 ℃, it decomposes into sodium pyrophosphate. The pH value of 1% aqueous solution is 8.8-9.2, which is insoluble in alcohol. 1% of water was lost during melting and crystallization.
Disodium hydrogen phosphate can be used to make citric acid, softener, fabric weight increasing agent, fireproof agent, glaze flux, welding flux, medicine, pigment, food industry and other phosphates. It can be used as industrial water treatment agent, printing and dyeing detergent, quality improver, neutralizer, antibiotic culture agent, biochemical treatment agent and food quality improver. |
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No. |
ITEMS |
SPECIFICATION |
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1. |
Appearance |
White powder or crystalline particles or colorless crystals |
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2. |
Assay (Na2HPO4, Dry Basis)，w/% |
≥98.0% |
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4. |
Loss on drying(Na2HPO4 ) |
≤5.0% |
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Loss on drying(Na2HPO4·2H2O ) |
18.0-22.0 |
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Loss on drying(Na2HPO4·12H2O ) |
≤61.0% |
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5. |
Insoluble Substances , w/% |
≤0.2% |
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6. |
Heavy metals(Pb) |
≤10 ppm |
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7. |
As |
≤3 ppm |
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8. |
Pb |
≤4 ppm |
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9. |
Fluoride（F） |
≤50 ppm |
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Application: |
Food as baking products, prevent oxidation discoloration, emulsifier of dairy products, prevent protein coagulation, solid drinks chelate, emulsify and buffer. |
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Packaging: |
25kg bag or as customer’s requirement |
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Storage condition: |
It should be stored in a dry, ventilated and clean warehouse. During loading and transportation, it should be handled with care to prevent package damage, moisture and heat. During transportation, it should be isolated from toxic substances. |
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Shelf life: |
2 years |
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