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Food additive trisodium phosphate anhydrous

Detail

English name: sodium phosphate
Alias: Trisodium phosphate anhydrous for food
Molecular formula: Na3PO4·nH2O (n=0,n=1,n=12)
Property: The important two are sodium phosphate tribasic dodecahydrate and anhydrous substance. Anhydrous substance is white crystal. Density 2.536g/cm3. Melting point 1340℃. Sodium phosphate tribasic dodecahydrate is colorless cubic crystal or white powder. Density 1.62g/cm3. Melting point 73.3℃. Decompose at 76.7℃. Turns into anhydrous substance after heating to 100℃ after losing 12 crystal water. Weathering in the dry air. Easily soluble in water. Its aqueous solution is strong alkaline. Insoluble in carbon disulfide and ethanol.
Executive standard: GB 25565-2010
Quality standard: 
Sensory requirements: Should be comply with the following requirements.  

Item

Requirements

Color

White

Structural state

Crystalline powder and particle


Physicochemical index: Should be comply with the following requirements.

Item

Index

   Anhydrous trisodium phosphate anhydrous (Na3PO4, calculated by ignition dry basis),w/% ≥

97.0

   Sodium phosphinate hydrate(Na3PO4•H2O, calculated by ignition dry basis),w/%  ≥

97.0

   Sodium phosphate tribasic dodecahydrate(Na3PO4•12H2O),w/%  ≥

97.0

   pH (10g/L solution)

11.5~12.5

   Arsenic (As)/ (mg/kg) ≤

3

   Fluoride (Calculated by F)/ (mg/kg)  ≤

50

   Heavy metal (Calculated by Pb)/ (mg/kg)   ≤

10

   Lead (Pb)/ (mg/kg) ≤

4

   Water insoluble matter,w/% ≤

0.2

   Ignition loss (Na3PO4),w/%  ≤

2

   Ignition loss (Na3PO4•H2O),w/%

8~11

   Ignition loss (Na3PO4•12H2O),w/%

45~57


Usage: Mainly used as emulsifier, buffer and quality improver in food industry. 

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