Sodium Tripolyphosphate Industrial Grade STPP
| HS Code | 184108 |
| Chemical Formula | Na5P3O10 |
| Molecular Weight | 367.86 g/mol |
| Appearance | white, granular or powdery solid |
| Solubility In Water | easily soluble |
| Ph Value Of 1 Aqueous Solution | 9.2 - 10 |
| Melting Point | 622 °C |
| Density | 2.49 g/cm³ |
| Hygroscopicity | hygroscopic |
| Complexing Ability | strong complexing ability with metal ions |
| Buffering Capacity | has buffering effect |
As an accredited Sodium Tripolyphosphate Industrial Grade STPP factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Sodium Tripolyphosphate Industrial Grade STPP is packed in paper bags or wooden boxes, lined with moisture-proof materials, and sealed tightly. The weight of each bag is in accordance with market regulations and clearly marked. |
| Storage | Sodium Tripolyphosphate Industrial Grade STPP should be stored in dry warehouses, away from moisture and acid and alkali, stacked in order, and easy to ventilate and inspect. |
| Shipping | When transporting Sodium Tripolyphosphate Industrial Grade STPP, it is necessary to protect it from rain, carry it gently, prevent the packaging from being damaged, and separate it from other items. |
Competitive Sodium Tripolyphosphate Industrial Grade STPP prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please call us at +8615380400285 or mail to sales2@liwei-chem.com.
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Historical Development
The development of Sodium Tripolyphosphate Industrial Grade STPP is closely related to the progress of the chemical industry. In the early days, people gradually realized the unique properties and uses of this substance in the process of studying the application of phosphorus compounds and began to explore its preparation method. From the initial small-scale trial production to the continuous improvement of the process and expansion of the production scale, after years of practice and innovation, a mature industrial production system has been formed, and the products are widely used in many fields.
Product Overview
Sodium Tripolyphosphate Industrial Grade STPP is a white powder or granular solid, odorless, easily soluble in water, and its aqueous solution is weakly alkaline. In industrial production and daily life, it is an important chemical raw material and auxiliary agent. It plays a key role in detergent, food processing, water treatment, ceramics and other industries. It can be used to improve product performance and processing technology.
Physical & Chemical Properties
In terms of physical properties, Sodium Tripolyphosphate Industrial Grade STPP has a white appearance, uniform particles, and a certain degree of hygroscopicity. It is easy to absorb water and agglomerate in a humid environment. It has a high melting point and will gradually melt during heating. In terms of chemical properties, it has a good ability to complex metal ions and can form stable complexes with calcium, magnesium and other ions, thereby softening water quality; it can also be used as an emulsifier and dispersant to make the substance evenly dispersed in the system; under certain conditions, hydrolysis reactions will occur to generate products such as hydrogen phosphate.
Technical Specifications & Labeling
Technical Specifications clearly stipulates the quality indicators of Sodium Tripolyphosphate Industrial Grade STPP, including the main content (measured in Na5P3O10), impurity content (such as chloride, heavy metals, etc.), moisture content, etc. When labeling, the product name, specification, manufacturer, production date, shelf life, and implementation standards are clearly marked on the package, and warning information such as "moisture-proof" and "keep away from acidic and alkaline substances" are also marked for easy use and management.
Preparation Method
Sodium Tripolyphosphate Industrial Grade STPP is often prepared with phosphoric acid and soda ash as raw materials. First, phosphoric acid and soda ash are mixed in a certain proportion and neutralized at a certain temperature to generate a sodium phosphate intermediate. Then the intermediate product is polymerized at a high temperature (about 400-500℃), and after cooling, crushing and other processes, the finished product is finally obtained. The entire preparation process requires precise control of parameters such as raw material ratio, reaction temperature, and time to ensure the stability of product quality.
Chemical Reactions & Modifications
Sodium Tripolyphosphate Industrial Grade STPP will undergo hydrolysis in aqueous solution, and the degree of hydrolysis is affected by factors such as temperature and pH value. When reacting with metal ions, it reduces the concentration of metal ions in water through complexation, and is often used in water treatment and detergent formulations. By adding different additives or changing the production process conditions, it can be modified to adjust its complexing properties, dispersing properties and hydrolysis rate to meet the diverse needs of different industries.
Synonyms & Product Names
The Synonyms of Sodium Tripolyphosphate Industrial Grade STPP include sodium tripolyphosphate, etc. Although the names are different in different occasions, documents or industries, they all refer to this industrial grade product.
Safety & Operational Standards
When using and operating Sodium Tripolyphosphate Industrial Grade STPP, operators must wear protective clothing, gloves, masks and other protective equipment to avoid contact between the product and the skin and eyes. If contact is accidental, rinse immediately with plenty of water. Storage and transportation follow relevant safety regulations, keep the workplace ventilated, and equip with necessary fire-fighting equipment to prevent safety accidents.
Application Area
Sodium Tripolyphosphate Industrial Grade STPP is an important auxiliary agent in the detergent industry, which can enhance the detergent's decontamination ability, hard water resistance and dispersibility; in the food processing industry, it can be used as a quality improver to improve the taste, water retention and stability of food; in the water treatment field, it is used to soften water and prevent scale formation; in the ceramic industry, it can be used as a disintegrator for green bodies and a suspending agent for glazes to improve the quality of ceramic products. It has a wide range of applications.
Research & Development
Currently, the research and development of Sodium Tripolyphosphate Industrial Grade STPP focuses on optimizing production processes, improving production efficiency, reducing energy consumption and costs; developing environmentally friendly products to reduce environmental impact; exploring its application in new fields, such as potential applications in nanomaterial preparation, biomedicine and other fields, and expanding the application boundaries of products.
Toxicity Research
Toxicity Research shows that Sodium Tripolyphosphate Industrial Grade STPP has low toxicity and has little impact on human health and the environment under normal use. However, excessive intake may affect the body's absorption of calcium. Long-term contact with high-concentration products may cause certain irritation to the skin and respiratory tract. Safety protection should be taken when using it.
Future Prospects
The Future Prospects of Sodium Tripolyphosphate Industrial Grade STPP are closely linked to the development of the industry. As people's requirements for product quality and environmental protection continue to increase, its production process will be more environmentally friendly and product performance will be further optimized. The demand in traditional application areas will remain stable. At the same time, if breakthroughs can be made in the application of emerging fields, it will bring it a broader market space, and the development prospects are worth looking forward to.
Where to Buy Sodium Tripolyphosphate Industrial Grade STPP in China?
As a trusted Sodium Tripolyphosphate Industrial Grade STPP manufacturer, we deliver:
Factory-Direct Value: Competitive pricing with no middleman markups, tailored for bulk orders and project-scale requirements.
Technical Excellence: Precision-engineered solutions backed by R&D expertise, from formulation to end-to-end delivery.
Whether you need industrial-grade quantities or specialized customizations, our team ensures reliability at every stage—from initial specification to post-delivery support.
As a leading Sodium Tripolyphosphate Industrial Grade STPP supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.
What raw materials does Sodium Tripolyphosphate Industrial Grade STPP use?
This product is made of sodium dihydrogen phosphate and disodium hydrogen phosphate. Mix the two materials in proportion, place them in a refractory brick kiln, and heat them with charcoal fire. The initial temperature is 300 degrees to evaporate the water, and then rise to 550 degrees to melt and polymerize the two materials for three hours. During this time, use a shovel to stir the materials so that they are evenly heated. When the color turns pure white, take them out and spread them on a stone slab to cool. After they solidify into blocks, they are broken and ground into fine powder to obtain Sodium Tripolyphosphate Industrial Grade STPP. The method is similar to frying tea cakes. The ratio and the temperature must be coordinated. If the ratio is not right, the chain will be short, and if the temperature is too high, the color will change, which is not a good product.
What is the appearance of Sodium Tripolyphosphate Industrial Grade STPP?
It mostly appears as white particles or powder, which is hard and brittle, and can be easily turned into fine powder by kneading. It is pure white without impurities, and the particles are uniform with little broken powder. It is good at absorbing moisture. If placed in a wetland for five days, it will clump. Therefore, it needs to be strictly protected from moisture. It is easily soluble in water. The aqueous solution is alkaline with a pH value of about 9.5. It can chelate with metal ions. It is stable at high temperatures and decomposes into sodium phosphate and sodium pyrophosphate when burned. It is compatible with most metals, but aluminum is slightly corroded by it. Therefore, glass and ceramic containers are suitable for storage. Its aqueous solution has weak foaming properties, but it has a strong decontamination power.
Where can Sodium Tripolyphosphate Industrial Grade STPP be applied?
In industry, it is the core component of detergents. It can dissociate grease and dirt to make clothes clean, especially suitable for washing heavy oily objects; it is used as a depilatory agent in leather making to completely remove the hair from the skin and make the texture soft. In the food industry, adding it to meat can retain water and make the products fresh and juicy; adding it to canned food can prevent the flesh from becoming soft and rotten. In the papermaking industry, it is used as a sizing agent in pulp to increase the strength of paper products; in water treatment, it can be used as a water softener to reduce the hardness of water. In addition, it can be used as a dispersant in paint to evenly suspend pigments and make the coating smooth. It is used like a good soap, which can wash away all kinds of dirt and make it clean, so it is valued by all industries.
How should Sodium Tripolyphosphate Industrial Grade STPP be stored?
It should be packaged in thick plastic bags, each bag weighing 40 kilograms, with the bag mouth sealed by heat sealing and covered with a woven bag. It should be stored in a high-dry warehouse, with wooden boards on the ground to prevent moisture, and oil paper on the boards to keep the materials one foot above the ground. The stack height should not exceed seven layers to prevent the bottom layer from being compressed and agglomerated. The warehouse is equipped with a calcium chloride moisture absorption tank, and ventilation is carried out for two hours every day during the rainy season. When transporting, choose a sunny day, cover the carriage with tarpaulin, and stop to avoid rain. If it agglomerates, it can be placed in a stone mill and ground into a fine powder, and the effectiveness will not be reduced. The only thing to do is to prevent impurities from mixing into it during grinding. The way to store it is to use it quickly, otherwise the properties will change easily after long-term storage.
What is the difference between Sodium Tripolyphosphate Industrial Grade STPP and Sodium Hexametaphosphate?
Although both are sodium polyphosphates, they have different molecular structures and properties. Sodium Tripolyphosphate Industrial Grade STPP has a three-chain structure and is more alkaline; Sodium Hexametaphosphate has a multi-chain structure and is more chelating. In terms of usage, the former is more suitable for detergents and food water retention, while the latter is mostly used for water treatment and papermaking. The manufacturing methods are also different. The former is polymerized at medium temperature, while the latter requires high-temperature melting. For example, mulberry and hemp cloth can both be used to make clothes, but mulberry is soft while hemp is tough, and each has its own advantages. Users should distinguish their properties to get the right use.
