Food additive potassium pyrophosphate

Chemical name: Potassium Pyrophosphate

Alias: Pyropotassium TKPP

Chemical formula: K₄P₂O₇

CAS NO. ：7320-34-5

Character:

Anhydrous potassium pyrophosphate is a white powder, with a relative density of 2.534 and a melting point of 1109 ℃. It is easy to absorb moisture and deliquesce, soluble in water but insoluble in ethanol. At 25 ℃, 187 G is dissolved in 100 g of water, which can chelate with alkaline earth metals and heavy metal ions.

The aqueous solution is alkaline, and the pH of 1% aqueous solution is 10.2. Insoluble in ethanol. The properties are similar to other polyphosphate.

It is prepared by melting dipotassium hydrogen phosphate and losing water molecules. It is a white crystalline powder or particle at room temperature. It has strong hygroscopicity in air. It is very soluble in water but insoluble in ethanol. The aqueous solution is alkaline and can inhibit food corruption and fermentation. The pH value of 1% aqueous solution is about 10.5. At 25 ℃, the solubility of potassium pyrophosphate in 100g water is 187G, It is hydrolyzed into potassium phosphate in acid or alkali solution and mixed with water to form viscous slurry. It is often combined with other condensed phosphates. For example, the binder of ham and sausage is made according to the proportion of 10% potassium pyrophosphate, 10% sodium pyrophosphate, 30% potassium polyphosphate, 30% sodium polyphosphate and 20% sodium metaphosphate. It is usually used to prevent bird droppings in canned aquatic products, prevent the discoloration of canned fruits, improve the expansion of ice cream, the extraction amount of coffee raw materials, the yield of ham and sausage In order to enhance the water holding capacity of fish, improve the taste and yield of noodles, and prevent cheese aging, the formula of electroplating solution in industrial production is often very complex in order to make the electroplating coating smooth and firm. In the past, cyanide was often used as complexing agent to prepare electroplating solution. However, because CN - is highly toxic, it does great harm 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, cyanide free electroplating is mainly used in electroplating, and this complexing agent instead of cyanide is potassium pyrophosphate.

Potassium pyrophosphate has all the properties of other polyphosphate, which is similar to sodium pyrophosphate, but has high solubility and can chelate with alkaline earth metals and heavy metal ions; It can form a stable complex with Ca2 + and Mg2 + in hard water, so as to soften hard water, improve washing capacity and remove dirt. It can also form a protective film on the surface of iron, lead, zinc, aluminum and other metals; Pyrophosphate ion (P₂O₇4-) has strong dispersion ability for fine dispersed solids and can promote the uniform mixing of fine and trace substances. High purity and low iron potassium pyrophosphate has stable pH buffer capacity and can maintain the pH value of the solution for a long time.

Purpose:

It is used as emulsifier, tissue modifier and chelating agent in food industry. It is also used as raw material of alkaline water for flour products. It is often used with other condensed phosphates to prevent guano stone from being produced in canned aquatic products and color change of fruits; Improve the expansion of ice cream, the yield of ham and sausage, and the water holding capacity of ground fish; Improve the taste and yield of flour food, prevent cheese aging, etc.

packing:

The conventional packaging is 25kg bag, double-layer plastic inner bag, and the outer bag is plastic woven bag.

Customizable packaging and shipping marks

Specification parameters: