Potassium pyrophosphate CAS 7320-34-5

Potassium pyrophosphate, also known as tetrapotassium pyrophosphate, is produced by melting dipotassium hydrogen phosphate and losing water molecules, it is a white crystalline powder or granule at room temperature, it has strong hygroscopicity in the air, it is extremely soluble in water but insoluble in ethanol, the aqueous solution is alkaline, it has the effect of inhibiting the corruption of food and fermentation, the pH of the 1% aqueous solution is about 10.5, and the solubility of the potassium pyrophosphate in 100g of water at 25℃ is 187g. It is hydrolysed into potassium phosphate in acid or alkali solution, and mixed with water to form viscous slurry. Mostly used with other condensed phosphates, such as 10% potassium pyrophosphate, 10% sodium pyrophosphate, 30% potassium polyphosphate, 30% sodium polyphosphate, 20% sodium metaphosphate ratio made of Chemicalbook ham, sausage binder, usually used to prevent canned aquatic products to produce guano stone, to prevent canned fruits from discolouration, to improve the expansion of ice cream, the amount of raw material for the extraction of coffee, ham, sausages, and to enhance water holding capacity. Getting rate, enhance the water holding capacity of fish, improve the taste of pasta and improve the rate, prevent the aging of cheese, etc. In order to make the plating layer smooth and solid, industrial production on the plating solution formula is often very complex. In the past, cyanide was often used as a complexing agent to formulate electroplating solution. However, because CN- is highly toxic, the health of plating workers is very harmful, at the same time, the discharge of CN-containing sewage, exhaust gas is also serious pollution of the environment. Therefore, nowadays electroplating mainly uses cyanide-free electroplating, and this alternative complexing agent to cyanide is potassium pyrophosphate.

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Model:
7320-34-5
Brand:
bosschemical
Code:
7320-34-5

Product Description

Potassium pyrophosphate

CAS No. 7320-34-5

Alias: Potassium pyrophospate trihydrate;OTASSIUM PYRO PHOSPHATE/TKPP;Tetrakaliumpyrophosphat;

Molecular formula：K4O7P2

Molecular weight：330.336522

Structural formula：

焦磷酸钾结构式

1.Performance and use:

White powder or lump. Relative density 2.534, melting point 1109℃. Soluble in water, insoluble in ethanol. The aqueous solution is alkaline, the solubility in 100g of water at 25℃ is 187 g. The concentration of 1% aqueous solution pH=10.2. Potassium pyrophosphate has all the properties of other condensed phosphates.

It is mainly used in cyanide-free electroplating, replacing sodium cyanide as the complexing agent of electroplating. It is also used as pretreatment agent for electroplating and pyrophosphate plating solution. Component of detergents for the preparation of clothing, component of Chemicalbook for metal surface cleaners and bottle detergents, additive for various cleaning agents. Used as a clay dispersant in the ceramics industry and as a dispersant and buffer for pigments and dyes. Used in the bleaching and dyeing industry to remove small amounts of trivalent iron ions from water and to improve the quality of bleaching and dyeing.

Analytical reagent, hydrogen peroxide stabiliser, electroplating, soap filler.

Used in cyanide-free electroplating, dyeing, refining clay, etc.

Used as analytical reagent, hydrogen peroxide stabiliser and soap filler.

Used as emulsifier, tissue improver, chelating agent in food industry, also used as raw material of lye for pasta products. Usually used in combination with other condensed phosphates to prevent canned aquatic products from producing Chemicalbook guano stone, to prevent discolouration of canned fruits; to improve the expansion of ice cream, the yield of ham and sausage, the water retention of ground fish; to improve the taste of pasta and to increase the yield, to prevent the cheese from aging and so on.

2.Technical indicators:

Appearance:	white powder	Qualified	Qualified
Orthophosphate:		Consistent with tests	Qualified
Potassium pyrophosphate （K₄P2O₇）%:	≥98	98.5	Qualified
Potassium oxide (K₂O)%	≥56.5	57.1	Qualified
PH(1%aqueous solution):	10.5±0.5	10.1	Qualified
Phosphoric anhydride （P2O5）%:	≥42.2	42．25	Qualified
water insoluble %:	≤0.1	0.020	Qualified
Heavy Mental（Pb）%:	≤0.003	0.001	Qualified
Chlorine(Cl)%:	≤0.02	0.008	Qualified
Iron (Fe)%:	≤0.01	0.005	Qualified