Professional Sodium Tripolyphosphate Powder Manufacturer and Supplier

We are a company based in Changchun, Jilin Province, which is known as "China's Granary." We offer food-grade and technical-grade STPP (CAS No. 7758-29-4, E451i) to producers around the world. The sodium tripolyphosphate powder we sell is at least 95% pure (Na₅P₃O₁₀) and has a P₂O₅ value of at least 57.0%. It is made by carefully heating disodium and monosodium phosphate.

We offer a wide range of 208 goods and have 97 happy customers all over the world. Our quality is guaranteed by FDA, ISO, HALAL, KOSHER, and FSSC standards. Our STPP is exactly what you need, whether you need high-efficiency makers for making detergents or ways to keep moisture in meat during processing.

Why Choose Doris as Your Product Partner?

Certified Quality You Can Trust

Following GB/T 9983-2004 and ASTM D501 standards, each batch goes through strict testing. Our quality control checks the Phase I material using X-ray diffraction to make sure that your production process goes smoothly and there are no problems with lumping or moisture.

We are registered with the FDA and have BRC approval, among other foreign licenses. These badges prove that you follow global rules for food safety and industry norms.

Fast Customization and Delivery

Need an exact formulation? We come up with unique solutions in seven days and finish production in fifteen days.

Our store management makes sure that some items can be shipped right away. You get to choose the amount you want to buy, and you can count on solid wait times and helpful customer service.

Comprehensive Technical Support

Our team of skilled professionals can help you with the right solution for your production needs. We help you get regular results whether you're making soap slurries or figuring out how to keep meat's wetness.

We keep an eye on new tools and trends in the industry all the time. With this information, we can suggest new food options that will help you stay competitive in markets that are always changing.

Global Logistics Excellence

You can get your packages delivered anywhere in the world by sea, air, or land. Our mixed container filling service mixes different types of food, which lowers the cost of shipping.

Your supply chain will run more smoothly if you have efficient customs clearance help and cheap freight options. Every time, you get your sodium tripolyphosphate powder on time.

One-Stop Procurement Advantage

Why deal with different suppliers when you can get 208 different food products from one trustworthy partner? Our wide range makes it easier for you to buy things.

This combination lowers the cost of buying things, makes administration easier, and makes sure that the quality of all of your ingredients is the same.

Sodium Tripolyphosphate Powder Advantages

Our product is used in many fields as a strong protection and useful addition. In food preparation, the product helps red meats, poultry, and fish keep their wetness, which keeps them soft and stops drip loss during freeze-thaw cycles.

For companies that make soap, it works as a quality builder that works with agents to break up grease. It keeps pH in check and traps metal ions that would otherwise damage equipment.

It is used as a high-efficiency deflocculant in the ceramics industry. By making the sludge less thick, you can cut the amount of water in it by 10 to 15 percent, which saves a lot of energy during spray-drying.

The chemical stops dirt from sticking back on washing uses. It keeps the structure of proteins stable when preparing fish. It improves the flowability of solutions with a lot of solids without adding too much water.

Manufacturers of pet food and animal feed also benefit from its ability to hold wetness in, which makes sure that goods keep their nutritional worth and taste throughout their shelf life.

Technical Specifications

Parameter	Specification
Chemical Formula	Na₅P₃O₁₀
CAS Number	7758-29-4
E Number	E451(i)
Assay (Na₅P₃O₁₀)	95.0% Min
Appearance	White Granular
P₂O₅ Content	57.0% Min
pH Value (1% solution)	9.5–10.0
Loss on Drying	0.7% Max
Water Insolubles	0.1% Max
Fluoride (F)	10 ppm Max
Arsenic (As)	3 ppm Max
Lead (Pb)	4 ppm Max
Mercury (Hg)	1 ppm Max
Cadmium (Cd)	1 ppm Max
Heavy Metals (as Pb)	10 ppm Max
Chlorides (as Cl)	0.025% Max
Sulphates (SO₄²⁻)	0.4% Max
Hexahydrate	23.5% Max
Higher Polyphosphates	1.0% Max

Frequently Asked Questions

Q: Why does my product cake during storage?

A: Caking occurs when the product absorbs moisture in high-humidity environments. STPP is hygroscopic—Phase I converts to hexahydrate when exposed to moisture, creating solid bridges between particles.

We recommend storing in hermetically sealed bags and maintaining warehouse humidity below 60%. Proper storage prevents this issue entirely.

Q: What is the functional difference between Phase I and Phase II STPP?

A: Phase I hydrates rapidly and releases heat, making it ideal for instant powder applications. Phase II hydrates slowly, which prevents premature thickening in detergent slurries.

Your choice depends on your production process requirements. We can help you select the optimal phase ratio for your application.

Q: Can I use this powder in liquid detergents?

A: Yes, though solubility limits apply (approximately 14g/100g water at 25°C). For higher concentrations, Potassium Tripolyphosphate (KTPP) offers better solubility.

However, it remains the cost-effective standard for suspension formulations in most liquid detergent applications.

Q: How do you distinguish between Tech Grade and Food Grade STPP?

A: While main content levels are similar, Food Grade undergoes strict purification to remove heavy metals. Our Food Grade meets FCC/E451 standards with Arsenic <3ppm and Lead <4ppm.

Using Tech Grade in food applications violates compliance regulations. We ensure you receive the correct grade for your intended use.

Q: Is STPP biodegradable?

A: STPP hydrolyzes into orthophosphates, which are natural nutrients. The environmental concern is eutrophication in waterways.

Many regions require wastewater treatment plants to have phosphate removal capabilities. We can provide technical data to help you meet local environmental regulations.