Disodium Phosphate
Disodium hydrogen phosphate(DSP)
Alias: Anhydrous disodium hydrogen phosphate
CAS No. : 7558-79-4
Molecular Formula: Na2HPO4
MW: 141.98
Character: White powder, flake or granular material. It dissolves in water and its aqueous solution is alkaline; not soluble in alcohol. Heat it up to 95 centigrade loses dihydrate and become sodium hydrogen phosphate anhydrous.
Uses: used as a water softener, fabric weight agent, fire retardant, and is used to glaze, solder medicine, pharmaceuticals, paints, food industry and manufacturing ,water treatment agent, printing and dyeing detergent, quality improver , neutralizer, antibiotics train agents, biological and chemical treatment agent of food quality improver.
Quality standard(reference standard)
Specifications
|
Na2HPO4
(Anhydrous)
|
Na2HPO4 .12H2O (Duohydrate)
|
Industrial Grade
|
Food Grade
|
Industrial Grade
|
Food Grade
|
Main contents %≥
|
98
|
98
|
97
|
97
|
P2O5 %≥
|
49
|
49
|
19.2
|
19.2
|
PH of 1% water solution
|
8.5-10.0
|
8.5-10.0
|
8.8-9.2
|
8.8-9.2
|
Chloride,as Cl % ≤
|
|
|
0.05
|
0.014
|
Sulfate, asSO4 %≤
|
|
|
0.7
|
0.25
|
Heavy metals, as Pb %≤
|
|
0.001
|
|
0.001
|
Arsenic, as As %≤
|
|
0.0003
|
0.005
|
0.0003
|
Fluoride, as F %≤
|
|
0.005
|
0.05
|
0.005
|
Water insoluble %≤
|
0.1
|
0.1
|
0.05
|
0.05
|
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