Potassium pyrophosphate cas 7320-34-5

Product Description

Potassium pyrophosphate, also known as tetrapotassium pyrophosphate, is obtained by melting dipotassium hydrogen phosphate and losing water molecules. It is a white crystalline powder or granules at room temperature. It has strong hygroscopicity in the air and is easily soluble in water, but insoluble in ethanol. The aqueous solution is alkaline and has the effect of inhibiting food spoilage and fermentation. The pH value of 1% aqueous solution is about 10.5. The solubility of potassium pyrophosphate in 100g water at 25C is 187g. It is hydrolyzed into potassium phosphate in acid or alkaline solution and mixed with water to form a viscous slurry. It is often used in combination with other condensed phosphates. For example, a binder for ham and sausage is prepared by mixing potassium pyrophosphate 10%, sodium pyrophosphate 10%, potassium polyphosphate 30%, sodium polyphosphate 30%, and sodium metaphosphate 20%. It is usually used to prevent struvite from forming in canned aquatic products, prevent discoloration of canned fruit, increase the expansion of ice cream, extract the amount of coffee raw materials, the yield of ham and sausage, enhance the water holding capacity of fish, improve the taste of noodles and increase the yield, prevent cheese aging, etc. In order to make the electroplating layer smooth and firm, the formula of electroplating solution in industrial production is often very complicated. In the past, cyanide was often used as a complexing agent to prepare electroplating solution. However, since CN- is highly toxic, it is very harmful to the health of electroplating workers. At the same time, the discharge of sewage and waste gas containing CN- also seriously pollutes the environment. Therefore, electroplating now mainly uses cyanide-free electroplating, and this complexing agent that replaces cyanide is potassium pyrophosphate.