STPP (Sodium Tripolyphosphate) – Detergent Grade & Industrial Grade Supplier from China

STPP (Sodium Tripolyphosphate), also known as Sodium Triphosphate, is an important inorganic phosphate chemical widely used in detergent formulations, food processing, ceramics, water treatment, and various industrial applications.

STPP is mainly used as a builder in detergent products, where it helps improve cleaning performance by softening water and enhancing the effectiveness of surfactants. It is also used in selected food applications as a stabilizer and moisture-retaining agent, as well as in industrial formulations requiring phosphate-based functional properties.

We supply STPP (Sodium Tripolyphosphate) from China for international customers, importers, distributors, and industrial users. Different grades and specifications can be provided according to application requirements.

STPP Product Information


Product Name	Sodium Tripolyphosphate
Abbreviation	STPP / STP
CAS Number	7758-29-4
Chemical Formula	Na₅P₃O₁₀
Molecular Weight	367.86
Appearance	White powder
Main Grades	Detergent Grade / Food Grade
Typical Assay	≥94%

STPP is a sodium phosphate compound with excellent water solubility, dispersing ability, and chelating properties. These characteristics make it an important ingredient in detergent and industrial formulations.

STPP for Detergents and Cleaning Products

The largest application of STPP is in detergent manufacturing.

In detergent formulations, STPP works as a builder, helping improve cleaning efficiency by binding calcium and magnesium ions in hard water. This reduces the negative effects of water hardness and allows surfactants to work more effectively.

STPP can provide several benefits in detergent systems:

Water softening
Improved detergency
Better soil suspension
Prevention of dirt redeposition
Improved powder flow properties
Enhanced cleaning performance

STPP is commonly used in:

Laundry detergents
Powder detergents
Industrial cleaning products
Institutional cleaning formulations

Although many modern detergent formulations have shifted toward phosphate-free systems in some markets due to environmental regulations, STPP remains widely used in many regions and industrial cleaning applications.

STPP Detergent Grade

Detergent Grade STPP is the most common commercial grade.

It is mainly used as a detergent builder because of its ability to control water hardness and improve washing performance.

For detergent manufacturers, important quality parameters may include:

STPP content
Whiteness
Particle size
Water insoluble matter
pH value
Heavy metal content

The suitable specification depends on the detergent formulation, production process, and target market requirements.

STPP Food Grade

Food Grade STPP is used in selected food processing applications where phosphate functionality is required.

In food applications, STPP can act as:

Stabilizer
Moisture retention agent
Texture modifier
Emulsifying aid

It is commonly used in certain processed food products, including seafood, meat products, and other food formulations where permitted by applicable regulations.

Food Grade STPP must comply with relevant food safety standards and customer requirements.

STPP for Water Treatment

STPP can be used in selected water treatment and water conditioning applications.

Its phosphate chemistry allows it to interact with certain metal ions, which can help control hardness-related issues in specific systems.

Applications may include:

Industrial water conditioning
Scale control formulations
Cleaning systems
Water softening processes

However, STPP is not a primary flocculant or coagulant like PAC or PAM. Its role in water treatment is mainly related to phosphate-based conditioning and scale control.

STPP for Ceramic and Industrial Applications

Beyond detergents and food, STPP is also used in various industrial applications.

In ceramic production, STPP can function as a dispersing agent, helping improve the processing properties of ceramic slurries.

Other industrial applications may include:

Ceramic manufacturing
Pigment processing
Paper production
Industrial formulations

Its dispersing and water-soluble properties make it useful in systems requiring phosphate-based additives.

STPP Properties and Advantages

STPP provides several useful properties for industrial formulations:

White free-flowing powder
Good water solubility
Strong dispersing ability
Water-softening capability
Builder function in detergents
Helps improve cleaning performance
Suitable for industrial formulations
Available in detergent and food grades

STPP vs Other Detergent Builders

STPP is one of the traditional detergent builders used worldwide.

Compared with alternatives such as sodium carbonate and zeolite, STPP provides strong water-softening ability and excellent compatibility with surfactant systems.

However, the choice of builder depends on the detergent formulation, environmental regulations, cost considerations, and regional requirements.

Storage and Handling of STPP

STPP should be stored in a dry and well-ventilated area. The product should be protected from moisture exposure because absorption of water may affect handling properties.

Proper packaging and storage conditions help maintain product quality during transportation and long-term storage.

Why Choose Our STPP?

We supply STPP (Sodium Tripolyphosphate) for detergent, food, industrial, and water treatment-related applications.

Our STPP products are available for:

Detergent manufacturers
Cleaning chemical producers
Food processing companies
Ceramic manufacturers
Chemical distributors
Industrial users

Technical documents including COA, SDS, and TDS can be provided according to customer requirements.

We support international customers with product information, export documentation, and reliable chemical supply solutions from China.

STPP Supplier from China

If you are looking for a reliable STPP supplier from China, we can provide Sodium Tripolyphosphate for detergent, food, ceramic, and industrial applications.

Please provide your required grade, quantity, application, and destination. We can provide product specifications, COA, SDS, TDS, quotation, and export supply information.

Frequently Asked Questions About STPP

What is STPP?

STPP stands for Sodium Tripolyphosphate. It is an inorganic phosphate compound widely used in detergents, food processing, ceramics, and industrial applications.

What is the CAS number of STPP?

The CAS number of Sodium Tripolyphosphate is 7758-29-4.

What is STPP used for?

STPP is mainly used as a detergent builder, water softener, dispersing agent, and functional phosphate additive in different industries.

Is STPP a surfactant?

No. STPP is not a surfactant. It is a phosphate builder commonly used together with surfactants in detergent formulations.

Is STPP used in detergents?

Yes. Detergent manufacturing is the largest application of STPP. It improves cleaning performance by softening water and enhancing surfactant efficiency.

What is the difference between STPP and PAC/PAM?

STPP is mainly a detergent builder and phosphate-based additive. PAC and PAM are water treatment chemicals mainly used for coagulation and flocculation.

What grades of STPP are available?

Common grades include Detergent Grade STPP and Food Grade STPP.

Request an STPP Quotation

Looking for a reliable STPP (Sodium Tripolyphosphate) supplier from China?

We provide STPP for detergent, food, ceramic, industrial, and specialty chemical applications.