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Chemical Name: Disodium hydrogen phosphate(food additive)
Molecular Formula: Na 2 HPO 4 ·12H 2 O, Na 2 HPO 4 ·2H 2 O, Na 2 HPO 4
Molecular Weight: 358￡?057
Properties: Colourless rhombic crystalline or prismatic crystal, easily soluble in water, insoluble in ethahol, relative density 1.63, melting point 34.6 ??, when heated to 180 ??, it may lose crystal water, convert to anhydrous.
Specifications:
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Item
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FCC,1996
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Assay(Na 2 HPO 4 ),≥%
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98.0
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As,≤%
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0.0003
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Heavy Metal(Pb),≤%
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0.001
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Fluoride,≤%
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0.005
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Insol. in water,≤%
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0.2
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Drying los
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Na 2 HPO 4 ,≤%
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5.0
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Na 2 HPO 4 ·2H 2 O,%
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18.0-22.0
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Na 2 HPO 4 ·12H 2 O,≤%
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61.0
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Use: In food industry, it is used as agent for bake, prevent oxidizing, in dairy product, it is used as emulsifier, prevent albumen conagulation. In solid beverage, it is used as buffer, chelate, agent,emul-sifier.
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