Disodium Phosphate (DSP), CAS 7558-79-4, E 339(ii) | Phosphate Additive, pH Buffer & Stabilizer

Product Overview 

Disodium Phosphate (DSP), CAS No.:  7558-79-4,  E No.: E 339(ii), is a high-purity food-grade sodium orthophosphate additive. It features good water solubility, stable chemical properties, and wide compatibility with food ingredients.

The primary function of Disodium Phosphate (DSP) is pH buffering and system stabilization. During thermal sterilization, cooking or long-term storage, food systems tend to experience sharp pH changes, which may lead to protein coagulation, precipitation or liquid separation. DSP works as a pH buffer to resist abrupt acid-base shifts and keep the food system stable.

It also provides sequestrant capacity to bind metal ions and reduce discoloration and oxidation. It acts as an emulsifying salt in processed cheese formulations to improve protein dispersion and melting properties. In addition, it can serve as a phosphorus nutrient fortifier for food and feed applications.

DSP is widely applied in dairy products, processed cheese, beverages, baked goods and canned food.

Character

Disodium Phosphate has stable chemical properties and excellent water solubility. Food grade DSP is produced via strict purification process with low impurity content, fully complying with global food additive standards. It has moderate alkalinity and strong pH buffering capacity, which stabilizes the pH of food systems without strong alkaline impact. Industrial grade DSP maintains consistent batch quality for basic industrial auxiliary use. The product is hygroscopic and must be stored in sealed packaging to avoid caking.

Main Functions

1.pH Buffer & Stabilizer — maintain stable pH value inside food systems, avoid sharp pH fluctuation

2.Food Emulsifier — help emulsification, keep uniform texture especially in dairy and cheese products

3.Metal Sequestrant — bind metal ions, reduce oxidation and discoloration, extend product shelf life

4.Texture Improver — optimize mouthfeel and texture of puddings, cereals and processed foods

5.Nutrient Supplement — provide phosphorus nutrition for food formulations

5.Industrial Auxiliary Agent — auxiliary raw material for water treatment, textile and detergent (secondary use)

Applications

1.Food Processing : Food grade DSP is widely used in processed cheese, condensed milk and other dairy products, puddings, cereals, canned meat and baked goods. It works as pH buffer and emulsifier to stabilize texture, keep consistent taste and prevent deterioration during storage.

2.Beverage & Functional Food :Used for pH buffering and system stabilization in protein drinks and functional beverages.

3.Industrial Fields:  Industrial grade DSP is available for industrial water treatment, textile dyeing and detergent raw material.

Packaging & Storage

Packaging: 25kg kraft paper bag with inner plastic bag, 1000kg jumbo bag, customized packaging available

Storage: Store in cool, dry and ventilated warehouse, keep packaging sealed; protect from moisture and high temperature

Shelf Life: 24 months under proper storage conditions