sodium tripolyphosphate(STPP)

Sodium Tripolyphosphate(STPP) CAS No.7758-29-4,is a white crystalline powder widely used as a multifunctional inorganic compound. It is highly soluble in water and valued for its ability to act as a builder, dispersant, and stabilizer across multiple industries.

Chemical formula: Na5P3O10
Molecular weight: 367.85
Standard executed:  GB25566-2010/FCC/E451(I)      GB/T9984-2008
Properties: White powder or granule in appearance. Soluble in water. Available in different types according to request, including bulk density (0.5-0.9g/cm3), solubility (10 gram,20 gram in 100 ml water), quick Dissolve, large granular Etc.
CAS No. 7758-29-4
Packaging and storage:  25kg/50lb kraft paper bag, 1000kg/1200kg jumbo bag. Store in a cool, dry, well-ventilated area away from toxic and hazardous chemicals.

Applications-sodium tripolyphosphate(STPP)

Food and Beverage Indust-ry

  • Meat and Seafood Processing: Incorporated at 0.2-0.5% via tumbling or injection to increase water-holding capacity, yielding up to 15% more product weight in hams, shrimp, and poultry.
  • Dairy and Prepared Foods: Emulsifier in cheeses and frozen meals to prevent syneresis and ensure smooth textures.
  • Canned Goods and Beverages: Sequestrant in soups and soft drinks to stabilize minerals and extend freshness.

Industrial and Household Uses

  • Detergents and Cleaners: Primary builder at 20-40% in powder formulations to soften water, suspend soils, and boost cleaning efficacy against grease and stains.
  • Water Treatment: Dosed at 5-20 ppm in cooling systems to control scale and microbial growth, reducing downtime in HVAC and boilers.
  • Ceramics and Textiles: Dispersant in clay slips and dye baths to achieve uniform particle size and color penetration.

Why Choose Our sodium-tripolyphosphate(STPP)?

Our Sodium Tripolyphosphate is refined from high-grade phosphates with iron <20 ppm and fluoride <10 ppm, guaranteeing low insolubles (<0.05%) and optimal Phase I/II ratios for tailored viscosity. Detergent manufacturers achieve 20% enhanced cleaning power, while food processors note superior yield retention. Available in technical/food grades, packaged in 25kg bags, 50kg drums, or 1000kg IBCs, with anhydrous forms for low-humidity environments and certifications including Kosher, Halal, and REACH.

Frequently Asked Questions (FAQs)-sodium-tripolyphosphate(STPP)

What is Sodium Tripolyphosphate (STPP)?

Sodium Tripolyphosphate (STPP) is a sodium polyphosphate with formula Na₅P₃O₁₀ and CAS 7758-29-4, serving as a sequestrant and emulsifier. It’s a white, water-soluble powder that chelates ions to improve stability in foods, cleaners, and treatments.

How is STPP used in meat processing?

STPP is applied at 0.3-0.5% in brine solutions for injection or marination, binding proteins to retain moisture and enhance tenderness. It synergizes with salt for optimal pH and texture in cured products.

Is STPP safe for food applications?

Yes, STPP is FDA GRAS and JECFA-approved up to 5 g/kg in foods, providing phosphorus nutrition with no ADI due to its safe hydrolysis and excretion in the body.

What is the shelf life of STPP?

In sealed, dry storage below 30°C, STPP retains full sequestering ability for 2-3 years, with minimal hydration or phosphorus reversion under ambient conditions.

Can sodium-tripolyphosphate(STPP) be combined with other phosphates?

STPP works well with pyrophosphates for amplified emulsification but can gel with high calcium—use Phase I for low-viscosity blends and test compatibility in prototypes.

Does STPP affect the pH of formulations?

STPP’s alkaline pH (9.4-10.0) raises solution pH mildly, beneficial for alkaline cleaners and buffers, but dilute appropriately in acidic foods to maintain balance.

What packaging options are available for STPP?

We offer 25kg moisture-barrier paper bags, 50kg HDPE drums, and 1000kg flexible IBCs, all anti-caking treated for easy handling and export compliance.

For blending advice, regulatory details, or large-scale supply, our specialists provide comprehensive support.

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