Potassium pyrophosphate CAS 7320-34-5, also known as tetrapotassium pyrophosphate, is produced by melting potassium hydrogen phosphate to lose water molecules. It is a white crystalline powder or particle at room temperature and has strong hygroscopicity in the air. It is easily soluble in water, but not in ethanol. The aqueous solution is alkaline and has the effect of inhibiting food spoilage and fermentation. The pH value of a 1% aqueous solution is about 10.5. At 25 ℃, the solubility of potassium pyrophosphate in 100g of water is 187g, which is hydrolyzed into potassium phosphate in acid or alkaline solutions, Mix with water to form a viscous slurry. It is often used in combination with other condensed phosphates, such as a binder for Chemicalbook ham and sausages made in a ratio of 10% potassium pyrophosphate, 10% sodium pyrophosphate, 30% potassium polyphosphate, 30% sodium polyphosphate, and 20% sodium metaphosphate. It is commonly used to prevent the formation of bird droppings in canned aquatic products, prevent color change in canned fruits, increase ice cream swelling, extract coffee raw materials, increase the yield of ham and sausages, and enhance the water holding capacity of fish In order to improve the taste and yield of noodles, prevent cheese aging, and make the electroplating coating smooth and firm, the formula of electroplating solution in industrial production is often complex. Previously, cyanide was commonly used as a complexing agent to prepare electroplating solutions. However, due to the high toxicity of CN -, it causes significant harm to the health of electroplating workers. At the same time, the discharge of wastewater and exhaust gas containing CN – also seriously pollutes the environment. Therefore, currently electroplating mainly uses cyanide free electroplating, and this complexing agent that replaces cyanide is potassium pyrophosphate.

Chinese name: Potassium pyrophosphate

Chinese synonyms: potassium pyrophosphate, AR, 99%; Edible potassium pyrophosphate; Potassium pyrophosphate; Tetrapotassium pyrophosphate; Anhydrous potassium pyrophosphate; Potassium pyrophosphate, TECH; Anhydrous potassium pyrophosphate, 96% MIN; Potassium pyrophosphate, trihydrate

English name: Potassiumpyrohostate

Synonyms in English: Potassiumpyrohostatrihydrate; OTASSIUMPYROPHOSPHATE/TKPP; Tetrakaliumprophosphat; POTASSIUMPYROPHOSPHATEPOTASSIUMPYROPHOSPHATEPOTASSICHEMIBookIUMPYROPHOSPHATEPOTASSIUMPYROPHOSPHATE; PotassiumDiphosphate; Potassiumpyrophosphateterabasic; PYROPHOSPHATETRAPOTASSIUM * PRACTICALGRADE; TetraPotassiumPyrophosphateTechGrade

CAS number: 7320-34-5

Molecular formula: K4O7P2

Molecular weight: 330.336522

EINECS number: 230-785-7

Purpose

Mainly used for cyanide free electroplating, replacing sodium cyanide as a complexing agent for electroplating. It is also used as a pre-treatment agent for electroplating and as a pyrophosphate electroplating solution. Ingredients for laundry detergent, metal surface cleaning agents, bottle cleaning agents, and additives for various cleaning agents. Used as a clay dispersant, pigment and dye dispersant, and buffer in the ceramic industry. The bleaching and dyeing industry is used to remove small amounts of trivalent iron ions from water and improve the quality of bleaching and dyeing.

Analytical reagents, hydrogen peroxide stabilizers, electroplating, soap fillers.

Used for cyanide free electroplating, dyeing, refined clay, etc

Used as a filler for analytical reagents, hydrogen peroxide stabilizers, and soap

In the food industry, it is used as an emulsifier, tissue modifier, chelating agent, and also as a raw material for alkaline water used in flour products. It is often used in combination with other condensed phosphates to prevent the formation of bird droppings in canned seafood and prevent discoloration of canned fruits; Improve the expansion of ice cream, the yield of ham and sausages, and the water holding capacity of ground fish; Improve the taste and yield of noodles, prevent cheese aging, etc.

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