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Trisodium Phosphate

CAS No.: 7601-54-9
Molecular formula: Na3O4P
Molecular weight: 163.940671
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Related Categories: Inorganics; Inorganic Chemicals; Inorganic Salts; Food and Feed Additives; Feed Additives; Food Additives; Moisture Retention Agents;

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Nature

Melting point

1340°C

Storage conditions

-20°C

Solubility

H2O: slightly soluble(lit.)

form

Powder

colour

White

Water solubility

Soluble in water. Insoluble in ethanol and carbon disulfide.

Sensitivity

Hygroscopic

Merck

14,8662

CAS database

7601-54-9(CAS DataBase Reference)


Chemical properties

Colorless to white crystal or crystalline powder, anhydrate or crystal water containing 1 to 12 molecules, odorless. The melting point of dodecahydrate is 73.4 ° C, and the relative density is d20201.62. Heat to 55 ~ 65 ° C into a decahydrate, heated to 60 ~ 100 ° C into a hexahydrate, heated to above 100 ° C into a monohydrate, heated to above 212 ° C to become anhydrate. Soluble in water (28.3g/100mL), insoluble in ethanol. It is deliquescent and weathered in dry air to form sodium dihydrogen phosphate and sodium bicarbonate. It is almost completely decomposed into disodium hydrogen phosphate and sodium hydroxide in water, and the pH of a 1% aqueous solution is 11.5 to 12.1. Groundhog LD50>2g/kg, AD10~70mg/kg (FAO/WHO, 1994).


Use

1. The quality improving agent of the work has the functions of improving the complex metal ions of the food, the pH value, and increasing the ionic strength, thereby improving the cohesiveness and water holding capacity of the food. Our country can be used for cheese, the maximum use is 5g/kg; the maximum use in Western ham, meat, fish, shrimp and crab is 3.0g/kg; the maximum use in cans, juice, beverages and dairy products is 0.5g /kg.

2. Used as an analytical reagent and water softener, also used for the purification of sugar

3. Used as softener and detergent, boiler anti-scaling agent, fixing agent for printing and dyeing, mercerizing enhancer for fabric, metal corrosion inhibitor or rust inhibitor. The enamel industry is used as a fluxing agent and a decolorizing agent. Used in the leather industry as a hide fat remover and a degumming agent.

4. Used as water softener, boiler descaling agent, metal rust inhibitor, sugar juice purifying agent, etc.


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