Disodium hydrogen phosphate heptahydrate 7782-85-6


Product Deail


Disodium hydrogen phosphate heptahydrate

Another name】Disodium hydrogen phosphate.

Description】Colorless crystal, soluble in water, alkaline in aqueous solution, easy to weathering in dry air. Relative density 1.52, 35.1℃ melt and remove 5 molecules of crystal water, 100℃ into anhydrous salt, 300℃ decomposition into sodium pyrophosphate.

Test items

GR

AR

CP

Other

Assay(HNa2O4•7H2O) /%

≥99.0

≥99.0

≥98.0

Custom

pH(50g/L,25℃)

9.1-9.4

9.1-9.4 9.1-9.4

Clarity of solution

Passes test Passes test Passes test

Water insoluble /%

≤0.005

≤0.005

≤0.01

Chloride(Cl) /%

≤0.000 5

≤0.001

≤0.003

Sulfate(SO4) /%

≤0.005

≤0.005

≤0.03

Total nitrogen(N) /%

≤0.001

≤0.002

≤0.005

Arsenic(As) /%

≤0.000 05

≤0.000 05

≤0.002

Potassium(K) /%

≤0.005

≤0.01

≤0.05

Iron(Fe) /%

≤0.000 5

≤0.000 5

≤0.001

Heavy metals (as Pb) /%

≤0.001

≤0.001

≤0.002

Use】Used for boiler water softener; Flame retardants for fabrics, wood and paper; Production of detergent; For glazes and soldering; Used as a stabilizer for hydrogen peroxide bleaching in printing and dyeing; Culture agent of MONOsodium glutamate, erythromycin, penicillin, streptomycin and sewage biochemical treatment products; Electroplating chemicals; In the food industry, it is used for manufacturing baking powder, quality improver, emulsifier, nutrient fortifier, fermentative agent, binder.