What Is Monosodium Phosphate?

One of the CAS numbers of trisodium phosphate is 7601-54-9 ^[1] , and the English name is Trisodium phosphate. Trisodium phosphate can be regarded as the base of H3PO4 phosphate, with 3 metal sodium atoms Na, all of which are replaced in its molecular formula. The product is obtained after the 3 hydrogen ions H + contained. Because phosphoric acid H3PO4 is a tribasic acid, its molecular formula has three hydrogen ions that can be replaced by metal elements.

Phosphate can improve or impart a series of excellent properties to food. It is widely used in food processing. Trisodium phosphate is no exception. It is mainly used as a moisture retention agent, stabilizer, and acidity regulator, which can improve the structure and taste of food. To improve food nutrition.

1. Colorless to white needle-like crystal or crystalline powder, anhydrous or crystal water containing 1-12 molecules, odorless. The melting point of dodecahydrate is 73.4 ° C. Soluble in water and insoluble in ethanol. 1% aqueous solution

1. Easy to deliquesce in dry air

1. Work quality improver, which has the effect of increasing the complex metal ions, pH value and ionic strength of food, thereby improving the binding power and water holding capacity of food. China stipulates that it can be used for cheese with a maximum use amount of 5g / kg; the maximum use amount in western-style ham, meat, fish, shrimp and crab is 3.0g / kg; the maximum use amount in canned food, juice, beverages and dairy products is 0.5g / kg. ^[1]

1. Spray-drying method Add trisodium phosphate dodecahydrate crystals to the dissolution tank, add 10% to 15% water, heat to 85-95 ° C, stir and dissolve, purify the solution, and pump the refined solution to the metering The tank is atomized by a sprayer. The atomizer uses a two-flow air jet nozzle. The atomization steam guide angle and level are 30 °, the atomization steam pressure is 0.15 to 0.3 Mpa, the inlet temperature is 650 to 750 ° C, and the outlet temperature is 140 to 170. Spray drying was performed at ° C to obtain a finished product of anhydrous trisodium phosphate. ^[6]

As a food additive, trisodium phosphate has been widely used in food processing. There are relevant standards for this product in foreign countries, and the indicators are very strict. US Food and Chemicals Code [FCC-V (2004)] (hereinafter referred to as the FCC) and the Japanese Food Additives Covenant (eighth edition, 2007) (hereinafter referred to as the Japanese Covenant).

The analysis methods of various indexes in foreign food additive trisodium phosphate standards adopt more classic and general methods, which is conducive to the daily inspection of production enterprises and better control of product quality. ^[4]

At present, the production of domestic food additive trisodium phosphate is increasing, and the export volume of products is increasing. However, there is no national standard for food additive trisodium phosphate in China. The production quality control of various production enterprises is basically based on the requirements of the FCC and JECFA. Some enterprises have also developed their own enterprise standards, which are basically equivalent to the FCC. ^[4]

Trisodium phosphate safety term

1. After contact with eyes accidentally, please immediately rinse with plenty of water and seek the advice of a doctor. (S26In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.)

2. Wear appropriate protective clothing, gloves and goggles or masks. (S36 / 37 / 39Wear suitable protective clothing, gloves and eye / face protection.)

3. In case of accident or discomfort, seek medical treatment immediately (show the label if possible). (S45In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)) ^[7-8]

Trisodium phosphate risk term

Causes burns. (R34 Causes burns) ^[7-8]

Invasion route: inhalation and ingestion

Health hazards: This product seriously damages the mucous membranes, upper respiratory tract, eyes and skin. After inhalation, it can cause death from spasms, inflammation, and edema of the throat and bronchi, chemical pneumonia, or pulmonary edema. Causes burning, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting after exposure. ^[9]

Trisodium phosphate emergency measures

Skin contact: Remove contaminated clothing and immediately rinse thoroughly with plenty of running water for at least 15 minutes. Seek medical attention.

Eye contact: Immediately open the upper and lower eyelids and rinse with running water or saline for at least 15 minutes. Seek medical attention.

Inhalation: Quickly leave the scene to fresh air. Keep your airways open. Give oxygen when breathing is difficult. Once breathing stops, begin CPR immediately. Seek medical attention.

Ingestion: Rinse mouth immediately and drink milk or egg white. Seek medical attention. ^[9]

Trisodium phosphate fire fighting measures

Extinguishing methods and extinguishing agents: Non-combustible. Extinguishing media available around the fire.

Wear a mask and gloves. Mix with sand, dry lime or soda ash, and then bury it in a dedicated waste area. If a large amount of leakage, collect and recycle or discard after harmless treatment. ^[9]

Trisodium phosphate handling

Personal protection: maximum allowable concentration:

Engineering control: airtight operation, pay attention to ventilation.

Respiratory protection: Workers should wear dust masks. Wear a gas mask if necessary.

Eye protection: Wear safety goggles if necessary.

Body protection: Wear work clothes.

Hand protection: Wear protective gloves.

Other protection: After work, shower and change clothes. Maintain good hygiene. ^[9]

Trisodium phosphate shipping matters

Store in a cool, ventilated warehouse. Keep away from fire and heat sources. Packaging is required to be sealed and not in contact with air. Moisture and sun protection. It should be stored separately from acids. Handle with care when handling to prevent damage to packaging and containers. ^[9]