7558-80-7 sodium dihydrogen phosphate anhydrous SODIUM DIHYDROGEN PHOSPHATE-16O4;acidsodiumphosphate;monosodiumdihydrogenorthophosphate;monosodiumhydrogenphosphate;monosodiumphosphate(sodiumdihydrogen;monosodiumphosphate(sodiumdihydrogenphosphate);
English name: Sodium dihydrogen phosphate anhydrous
Alias: Sodium acid phosphate for food
Molecular formula: NaH2PO4·nH2O (n=0,n=1,n=2)
Property: White powder, melting point 60℃, easily soluble in water, insoluble in alcohol, turns into anhydrous substance if heated to 95℃, transforms into sodium acid pyrophosphate at 190-204℃ , then condenses to sodium polyphosphate at 204-244℃.
Executive standard: GB 25564-2010
Quality standard:
Sensory requirements: Should be comply with the following provisions.
Item |
Requirements |
Color |
White |
Structural state |
Crystalline powder or particle |
Physicochemical index: Should be comply with the following provisions.
Item |
Index |
Content of sodium dihydrogen phosphate anhydrous (Calculated by NaH2PO4) (Calculated by dry basis),w/% |
98.0-103.0 |
Water insoluble matter,w/% ≤ |
0.2 |
Arsenic (As)/ (mg/kg) ≤ |
3 |
Heavy metal (Calculated by Pb),w/% ≤ |
10 |
Lead (Pb)/ (mg/kg) ≤ |
4 |
Fluoride (Calculated by F)/ (mg/kg) ≤ |
50 |
pH value (10g/L solution) |
4.1-4.7 |
Drying loss (NaH2PO4),w/% ≤ |
2.0 |
Drying loss (NaH2PO4·H2O),w/% |
10.0-15.0 |
Drying loss (NaH2PO4·2H2O),w/% |
20.0-25.0 |
Usage: Mainly used as emulsifier, buffer and quality improver in food industry.
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