Product Overview 

Sodium Trimetaphosphate (STMP) is a cyclic polyphosphate with stable chemical structure and high water solubility. Its most distinctive property is acting as an efficient cross-linking agent in food systems, widely utilized for starch modification to improve structural stability, thermal resistance, and anti-retrogradation performance of starch materials.

In starch-based food processing, STMP promotes molecular cross-linking, forming a compact and uniform network structure that enhances elasticity, toughness, and water retention of finished products such as rice noodles and vermicelli.

In addition to its core cross-linking function, STMP serves as a sequestering agent to bind metal ions, effectively inhibiting oxidation, discoloration, and sedimentation in food formulations, maintaining stable sensory quality and extending shelf performance. It is also applied in certain industrial scenarios for metal ion regulation and water treatment.

Character

Sodium Trimetaphosphate appears as a white, odorless crystalline powder with stable physical and chemical properties under normal storage conditions.

Compared with linear phosphates, its unique cyclic molecular structure provides superior cross-linking reactivity with starch and protein molecules. It exhibits excellent compatibility with various food raw materials, with low impurity and heavy metal content that fully complies with international food additive safety standards.

Main Functions

1. Cross-linking Agent 

As the most representative function of STMP, it cross-links starch molecular chains during processing. This reaction rebuilds a stable three-dimensional network structure, significantly improving thermal stability, freeze-thaw resistance, and anti-aging performance of modified starch. It effectively enhances the toughness, elasticity, and structural firmness of starch-based foods.

2. Sequestering Agent

STMP chelates calcium, magnesium, iron and other metal ions in food systems. It reduces catalytic oxidation reactions, prevents product discoloration, turbidity and precipitation, and maintains uniform texture and stable appearance of food products.

3. Texture Stabilizer

Optimizes the water retention capacity and structural uniformity of starch and gel foods, reducing breakage rate during cooking and processing, and improving overall texture consistency.

Applications

1. Food Industry 

Modified Starch Production: STMP is a key cross-linking phosphate reagent for producing cross-linked modified starch. Modified starch treated with STMP possesses better heat resistance, shear resistance and storage stability, widely used in food thickening, filling and stabilizing systems.

Starch-Based Noodle Products: Applied in rice noodles, vermicelli, and pasta products to enhance ductility and toughness, reduce breakage, improve water locking performance, and prevent soup turbidity during cooking.

Gel & Canned Food: Stabilizes gel structure, improves texture uniformity, and inhibits metal-induced deterioration in canned foods and jelly systems.

2. Industrial Application 

Used in water treatment, ceramic manufacturing and detergent industries for metal ion sequestration and system stabilization.

Packaging & Storage

Packaging: 25kg PE lined kraft paper bag, 1000kg bulk jumbo bag, customizable packaging available.

Storage: Store in cool, dry and ventilated warehouse, keep sealed to avoid moisture absorption and contamination.

Shelf Life: 24 months under proper storage conditions.