Tetrasodium pyrophosphate CAS 7722-88-5
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Tetrasodium pyrophosphate CAS 7722-88-5

Anhydrous sodium pyrophosphate is colourless transparent crystal or white powder. Relative density 1.824, melting point 880℃. Soluble in water, insoluble in alcohol, its aqueous solution is alkaline, easy weathering, moisture absorption. It has strong pH buffer, and has certain chelating effect on metal ions. Anhydrous sodium pyrophosphate is mainly used as water softener, printing and dyeing bleaching agent, wool degreasing agent, boiler descaling agent, metal ion chelating agent, dispersant, printing and dyeing and grass products fine bleaching agent. Additives for synthetic washing. It is also used as a regulator for oil well mud, and as an auxiliary in the production of ABS resin. Used as copper complexing agent in electroplating chemicalbook liquid. Sodium pyrophosphate decahydrate is mainly used as toothpaste stabiliser. In the food industry as emulsifier, buffer, chelating agent, gelling agent, stabiliser. Sodium pyrophosphate and Ag+ meet to produce white silver pyrophosphate, while orthophosphate and Ag+ reaction to produce yellow silver orthophosphate precipitate, which is to distinguish each other from the two salts of the characteristic reaction. Sodium pyrophosphate has the function of integrating with metal particles, dispersing, flocculating, emulsifying, preventing lipid and oxidation, and increasing viscosity of casein, etc. It has the function of inhibiting food spoilage when the Ph value is high.
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  • 7722-88-5

  • bosschemical

  • 7722-88-5

Tetrasodium pyrophosphate

CAS No. 7722-88-5

Alias:pyrophosphatedesodium;jiaolinsuanan;pyrophosphatetetrasodique;Sodiumpyrophosphate,anhydrous;sodiumpyrophosphate[na4p2o7];tetranatriumpyrophosphat;tetrasodiumpyrophosphate,anhydrous;victortspp

Molecular formula:Na4O7P2

Molecular weight:265.902402

Structural formula:

焦磷酸钠 结构式

1.Performance and use:

White crystalline powder. Easily soluble in water, solubility of 6.23g in 100g of water at 20℃, its aqueous solution is alkaline; insoluble in alcohol.

Used as printing and dyeing fine bleaching additives, water softener, etc. Used as copper complexing agent in electroplating solution. Used as descaling agent in mechanical processing. Used as bleaching auxiliary with insurance powder, wool degreasing agent. Plant fibre bleaching, printing and dyeing and fine bleaching additives. Used in synthetic detergent as auxiliary agent. In the production of calcium phosphate for toothpaste, add appropriate amount of sodium pyrophosphate to make the formation of colloids, play a stabilising role. Used as dispersant and emulsifier in chemical production. It is used as water softener and boiler descaler in water treatment. It is the raw material for producing other pyrophosphates.

Used in canned food, fruit juice drinks, dairy products, soya milk, etc., work quality improver. Usually used in preparation with other condensed phosphates. Used as a texture improver to increase the complex metal ions, pH value, and ionic strength of food products, thus improving the adhesion and water retention of food products. China's regulations can be used for dairy products, poultry Chemicalbook fish products, meat products, ice cream and instant noodles, the maximum amount of 5.0g/kg; in canned food, fruit juice (flavour) drinks and plant protein drinks, the maximum amount of 1.0g/kg. as a whitening agent used to compound potato starch, the maximum amount of 0.025g/kg.

Used in electroplating industry to formulate electroplating solution, can form complex with iron. Used as wool degreasing agent and bleaching agent in wool spinning industry. Used in paper industry for bleaching of paper and plant fibre. It is used in printing and dyeing industry as an auxiliary in printing and dyeing and fine bleaching. Used as toothpaste additive in daily chemical industry, can form colloid with calcium hydrogen phosphate and play a stabilising role, also can be used in synthetic detergent and production of shampoo and other products. Used as water softener in water treatment. It is used as rust remover in mechanical processing. Used as dispersant and emulsifier in chemical production. It can also be used as water treatment agent, oil drilling, etc. It is used as quality improver, emulsifier, buffer and chelating agent in food industry. Uses water softener, rust remover,

2.Technical indicators:

NO. Items for detecting and analyzing
Results of inspecting



1 Assay(Na4P2O7 ) %≥ 96.5-100.5 97.03
2 Scorch Reduction(Na4P2O7) %  0.5 0.14
3 PH (10g/L solvent) 9.9-10.7 10.37
4 insoluble in water %≤ 0.2 0.034
5 As %≤ 0.0003 0.0001
6 Heavy metal(Pb ) %≤ 0.005 0.000675
7 F %≤ 0.002 0.000741
8 Pb 0.0004 ∠0.0004

3. Packaging and storage:

Packaging specification: Packing specification: 25kg/bag, also can be determined according to user's need.

During transportation, it is necessary to protect against sunlight, rain, and high temperatures.

The product should be stored in a cool, dark, ventilated place, away from sources of fire.

4.Safety protection:

Pay attention to labor protection when handling it and avoid contact with skin, eyes, etc.After contact, rinse immediately with plenty of water


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CAS No. 7722-88-5

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