What are the main uses of Tetrasodium pyrophosphate?

The Tetrasodium pyrophosphate is mainly used in electroplating solutions in industry and can form complexes with iron. 

It can be used as a rust remover in mechanical processing. Wool degreasers and bleaching agents are used in the wool spinning industry. Bleaching agent for paper and vegetable fibers in the paper industry. 

Toothpaste additives are commonly used in the daily chemical industry and can be used to synthesize detergents and produce shampoo and other products. 

In the printing and dyeing industry, it is commonly used as additives in printing, dyeing and fine bleaching. 

Used as water softener in water paste treatment. 

In chemical production, dispersants are usually used in water treatment agents, oil drilling, etc.

Tetrasodium pyrophosphate, with the chemical formula Na4P2O7, is a white crystalline powder that easily absorbs moisture in the air and becomes deliquescent. It is soluble in water and insoluble in ethanol and other organic solvents. It has strong complexing ability with Cu2+, Fe3+, Mn2+ and other metal ions. The aqueous solution is still stable below 70℃. It will be hydrolyzed into disodium hydrogen phosphate when boiled.

Physical and chemical properties: white powder or crystal. Relative density 2.534, melting point 980℃. Colorless transparent crystal or white crystal powder. Easily soluble in water, the solubility in 100g of water is 6.23g at 20°C, and its aqueous solution is alkaline; insoluble in alcohol. The aqueous solution is stable below 70°C and will be hydrolyzed into disodium hydrogen phosphate when boiled. It easily absorbs moisture in the air and becomes deliquescent. It can form complexes with alkaline earth metal ions; when it meets Ag+, it generates white silver pyrophosphate.

Can undergo complexing reactions with metal ions. The pH value of its 1% aqueous solution is 10.0-10.2. It has the general properties of ordinary polymeric phosphates, that is, it has emulsification and dispersion properties, prevents fat oxidation, improves protein binding properties, and also has the function of inhibiting the oxidation and fermentation of food under high pH values.

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