Sodium tripolyphosphate is a food additive that belongs to the category of softeners and thickeners.

Sodium tripolyphosphate is commonly used in food, which can be used as quality improver, moisture retention agent, metal chelating agent, pH regulator. In the industry, regulators are usually used as quality improvers for canned food, beverages, soybean milk and other foods. It tenderizes canned ham and softens the skin of canned fava beans.

1. What are food additives?

1. Sodium tripolyphosphate is a food additive of softener and thickener. It is often used in food and can be used as a quality improver, water retention agent, and metal chelating agent PH regulator. Many food production should add sodium-containing auxiliary materials and additives as preservatives to make food look and taste better, such as monosodium glutamate in monosodium glutamate, leavening agent in biscuits and sodium bicarbonate in baking powder, sodium nitrite in food additives, sodium glutamate in beverages Sodium tripolyphosphate and sodium benzoate among various preservatives.

2. Sodium tripolyphosphate is generally used as a quality improver for fruit juice, canned food, dairy products, beverages, soybean milk and other foods in the food industry. It tenderizes ham in a can and softens fava bean skins in a can.

3. Whether sodium tripolyphosphate has water and hexahydrate, it is a condensed phosphate with a chain structure, the relative density of hexahydrate Na5P3O10·6H2O is 1.786, it can be weathered, the melting point is 53 ℃, and it is high temperature type without water ( Type I) and low temperature type (Type II), relative molecular mass 367.86, melting point 662°C relative density 2.49, white crystal or crystalline powder easily soluble in water (14.5g/100g at 25°C, 23.25g/100g at 80°C), Type Ⅰ is hydrolyzed faster than type Ⅱ, so type Ⅱ is also called slow hydrolysis type. Type II transforms into Type I at 417°C.

2. The application direction of sodium tripolyphosphate

1. Sodium tripolyphosphate suspending, chelating, peptizing, dispersing, emulsifying PH buffer can be used as industrial water softener, synthetic detergent, dyeing agent, leather pre-tanning agent, organic synthesis catalyst, pharmaceutical industry dispersant and food additive. In addition to exports, domestic STPP consumption is mainly concentrated in detergent, ceramics, food and other industries.

2. Water treatment is mainly used as water softener. Sodium tripolyphosphate has the properties of an ion exchanger, which can produce a soluble complex Na3MP3O10 (M for metal ions) with magnesium, calcium and iron ions in water, which can shield magnesium and calcium hard salts and prevent magnesium and calcium from depositing. form. In addition, it also has a strong buffering effect (PH can also be used as a corrosion inhibitor for the best buffering effect in the range of 4-14) and surface activity.

lucas lee Asked question January 10, 2023