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disodium hydrogen phosphate (DSP)

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category：Industrial application
Properties: Dodecahydrate is a white crystal with a relative density of 1.52, easy to weather, melts at 35°C and loses 5 crystal waters, becomes anhydrous at 100°C, and sodium pyrophosphate at 250°C; anhydrous is white Powder, easy to deliquescence; both are easily soluble in water, the aqueous solution is weakly alkaline, insoluble in alcohol.
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disodium hydrogen phosphate (DSP)

Disodium Phosphate

Chemical formula: Na2HPO4.nH2O(n=0,12)

Molecular weight: Na2HPO4.12H2O--358.15, Na2HPO4--141.98

CAS No.: 7558-79-4 (anhydrous), 10039-32-4 (12 water)

Executive standard: HG/T2965-2009 (industrial grade)

Properties: Dodecahydrate is a white crystal with a relative density of 1.52, easy to weather, melts at 35°C and loses 5 crystal waters, becomes anhydrous at 100°C, and sodium pyrophosphate at 250°C; anhydrous is white Powder, easy to deliquescence; both are easily soluble in water, the aqueous solution is weakly alkaline, insoluble in alcohol.

Uses: Dodecahydrate is used in boiler water softener, flame retardant for fabric, wood and paper, production of detergent, as glaze and welding flux, as stabilizer for hydrogen peroxide bleaching in printing and dyeing, monosodium glutamate, erythromycin, penicillin , streptomycin and sewage biochemical treatment products, etc., used for electroplating, etc.; anhydrous is used as flame retardant, silk weighting agent, reactive dye auxiliary agent, used instead of borax in welding and brazing .

Packing: inner plastic outer woven, net weight 25Kg, 50Kg, 1000Kg per bag, stored in a ventilated and dry place.

[Table unit: %]

Serial number  Indicator name    National standard  Internal control index  National standard  Internal control index 
Disodium hydrogen phosphate    Anhydrous  Twelve waters 
1  Principal content  ≥  97  99  97  99 
2  Arsenic (AS)  ≤  0.005  0.005  0.005  0.005 
3  Fluoride (in F)  ≤  0.05  0.001  0.05  0.001 
4  Heavy metals (in Pb)  ≤  0.001  0.001  0.001  0.001 
5  Water insoluble matter  ≤  0.05  0.008  0.05  0.008 
6  Sulfate (in terms of SO4)  ≤  0.7  0.005  0.7  0.005 
7  Iron (in Fe)  ≤  0.05  0.003  0.05  0.003 
8  Lead (in Pb)  ≤  /  0.0004  /  0.0004 
9  PH (10g/L solution)    9.0-0.2  9.0-0.2 
10  Chloride (in Cl)  ≤  0.05  0.01  0.05  0.005 
11  Drying reduction (Na2HPO4)    /  5  /  61 
12  Appearance    White powder  White crystal 
Keyword:
anhydrous
used
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Trisodium Phosphate (TSP)
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Dipotassium Hydrogen Phosphate (DKP)

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Properties: White powder or block, the apparent specific gravity is above 0.3, the melting point is 1100 ° C, soluble in water, insoluble in alcohol, the aqueous solution is alkaline. It has high solubility in water (187 grams per 100 grams of water at 25°C), and has a slight deliquescence.
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