Disodium Phosphate Anhydrous (7558-79-4)

DiSodium Phosphate(DSP)
Molecular formula: Na2HPO4. NH2O (n=0, 12)
Molecular weight: 358.0
Standard executed: HG/T2965-2000(Industrial Grade)
HG2920-2000(Food Grade)
CAS Number: 7558-79-4

Properties:
White or colorless crystalline free flowing solid, efflorescent in air, easily soluble in water, but insoluble in alcohol, its water solution is slightly alkaline, relative density at 1.52 g/cm3, melting point at 35 degree
Uses:
Used as a fire-preventio agent for fabric, timber, and paper, also as water softening agent for boiler, food additive, buffering agent, solder, tanning agent, etc.
Packing and storage: In 25kg net bags, store at a cool, dry and well ventilated place.
Guaranteed Technical Specifications:

No.
Specifications
Na2HPO4
(Anhydrous)
Na2HPO4.12H2O (Duohydrate)

Industrial Grade
Food
Grade
Industrial Grade
Food
Grade

1
Main contents %≥
98.0
98.0
98.0
98.0

2
Phosphorus pentoxide, as P2O5
49.0
49.0
19.2
19.2

3
pH of 1% water solution
8.5-10.0
8.5-10.0
8.8-9.2
8.8-9.2

4
Chloride(as Cl)max%
0.05
0.014
5
Sulfate, as SO4 %≤
0.7
0.25

6
Heavy metals, as Pb %≤
0.001
0.001
7
Arsenic, as As %≤
0.0003
0.005
0.0003

8
Fluoride, as F %≤
0.005
0.05
0.005
9
Water insoluble %≤
0.10
0.10
0.05
0.05