Ammonium Polyphosphate (APP-0S)
| HS Code | 880221 |
| Chemical Formula | (NH4)n+2PnO3n+1 |
| Appearance | White powder |
| Melting Point | Above 250 °C |
| Solubility | Insoluble in water |
| Ph Value | Neutral in aqueous suspension |
| Density | Approx. 2.3 g/cm³ |
| Thermal Stability | Good, decomposes at high temperatures |
| Phosphorus Content | High, contributes to flame - retardancy |
| Nitrogen Content | Significant, also aids in flame - retardancy |
| Particle Size | Fine - sized, can be adjusted by production process |
As an accredited Ammonium Polyphosphate (APP-0S) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Ammonium Polyphosphate (APP-0S) is packaged in a single-layer plastic woven bag for fertilizer grade, and the bag mouth is tied tightly and then covered with a net bag; for industrial grade, it is used in a cardboard barrel lined with a plastic bag, the barrel lid is nailed firmly, and the product logo is affixed to the outside to prevent damage during transportation. |
| Storage | Ammonium Polyphosphate (APP-0S) is stored in a high-dry warehouse, divided into fertilizer grade and industrial grade. It is three feet away from the wall and one foot away from the ground. The plastic woven bags are stacked no more than four layers, and the cardboard barrels are placed on wooden racks to prevent the ground moisture from invading and prevent it from agglomerating. |
| Shipping | Ammonium Polyphosphate (APP-0S) is transported in ordinary trucks. Fertilizer grade can be transported in bulk, but it needs to be covered with tarpaulin to prevent rain and snow; industrial grade is transported in barrels, and straw is placed between barrels to prevent shock. It is forbidden to throw during loading and unloading to prevent packaging damage. |
Competitive Ammonium Polyphosphate (APP-0S) 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.
We will respond to you as soon as possible.
Tel: +8615380400285
Email: sales2@liwei-chem.com
Historical Development
In ancient times, plant ash and bone meal were mostly used for fertilization. In recent times, agriculture has flourished, and high-efficiency phosphate fertilizers are needed. Craftsmen then developed polyphosphates, and Ammonium Polyphosphate (APP-0S) was born to meet the needs. At first, it was only used as fertilizer, but later its industrial value was discovered. After improvement, it is now used as a system for fertilizer and industrial use.
Product Overview
Ammonium Polyphosphate (APP-0S) is white granules or powder, odorless, slightly soluble in water, rich in phosphorus and nitrogen. Fertilizer-grade can be used as slow-release fertilizer to promote crop growth; industrial-grade is flame-retardant and used in coatings and papermaking, a material with multiple functions.
Physical & Chemical Properties
Ammonium Polyphosphate (APP-0S) has a slightly higher density than water. Granular ones have moderate hardness, and powdery ones are easy to fly. The melting point is about 230℃. It decomposes and releases ammonia when heated. The aqueous solution is weakly acidic and slightly corrosive to metals. It needs to be stored in ceramic or plastic containers.
Technical Specifications & Labeling
Ammonium Polyphosphate (APP-0S) standards: fertilizer grade total phosphorus ≥60%, nitrogen ≥10%; industrial grade purity ≥95%, the full name Ammonium Polyphosphate (APP-0S) must be written on the label, with grade, index and use instructions attached.
Preparation Method
Ammonium Polyphosphate (APP-0S) is usually prepared with phosphoric acid and liquid ammonia as raw materials, polymerized at high temperature in a reaction tower, granulated and dried to obtain Ammonium Polyphosphate (APP-0S). Fertilizer grade needs to control water solubility, while industrial grade needs to improve purity.
Chemical Reactions & Modifications
Ammonium Polyphosphate (APP-0S) is gradually decomposed into phosphate and ammonium ions by microbial action in the soil for crop absorption; in industrial applications, it decomposes in fire to form a flame retardant coating, and its properties are stable at room temperature.
Synonyms & Product Names
Ammonium Polyphosphate (APP-0S) is also known as "ammonium polyphosphate (0S type)", but it must be called the full name Ammonium Polyphosphate (APP-0S) in transactions to distinguish it from other models.
Safety & Operational Standards
When handling fertilizer-grade Ammonium Polyphosphate (APP-0S), gloves must be worn to avoid contact with the skin; industrial-grade operations require masks to prevent dust from entering the lungs, and hands must be washed after work. Fireworks are prohibited in storage areas.
Application Area
Ammonium Polyphosphate (APP-0S) fertilizer grade is used in rice fields and fruit and vegetable gardens as base fertilizer or topdressing, and slow-release energy supply; industrial grade is used for fire-retardant coatings, paper flame retardant treatment, and also as a water treatment agent, with a wide range of uses.
Research & Development
The Artisan Scholar is exploring the application of Ammonium Polyphosphate (APP-0S) in organic agriculture, studying its transformation rules in the soil, and developing low-energy production processes to improve fertilizer utilization and industrial flame retardant performance.
Toxicity Research
Ammonium Polyphosphate (APP-0S) has low toxicity. Fertilizer-grade and small amounts are harmless if accidentally ingested. However, long-term exposure to industrial-grade products may cause respiratory discomfort, so ventilation protection should be strengthened to avoid long-term exposure.
Future Prospects
With the improvement of agricultural quality and industrial safety, the demand for Ammonium Polyphosphate (APP-0S) will increase. Its process will become more sophisticated, with more sustained release at the fertilizer level and more efficient at the industrial level, benefiting both the agricultural and industrial sectors.
Where to Buy Ammonium Polyphosphate (APP-0S) in China?
As a trusted Ammonium Polyphosphate (APP-0S) 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 Ammonium Polyphosphate (APP-0S) supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.
Why does Ammonium Polyphosphate (APP-0S) need special purification during its preparation?
In addition to the conventional polymerization process, this product needs to be deeply purified to remove impurities such as chloride ions and heavy metals. The crude product after polymerization is dissolved in deionized water, activated carbon is added to adsorb pigments and organic matter, and then the metal ions are removed by ion exchange resin. After filtration, it is evaporated and crystallized to obtain high-purity Ammonium Polyphosphate (APP-0S). The process is like alchemy and impurity removal. After purification, the purity reaches more than 99.5%, and the chloride ion content is less than 0.01%. Therefore, it is suitable for scenarios with strict purity requirements, such as flame retardant food packaging materials.
What are the applications of Ammonium Polyphosphate (APP-0S) in food contact materials?
Due to its high purity, this product meets the safety standards for food contact materials and can be used for flame retardant treatment of plastic films for food packaging. The polyethylene film with a 5% addition has a flame retardant level of UL94 HB, no odor, and does not migrate to food. After immersion testing, the migration amount is less than 0.01 mg/dm2. It has good compatibility with food-grade resins, does not produce toxic gases during processing, and the packaging film made has high transparency and does not affect the visibility of food, so it is safe to use in food packaging such as biscuits and chocolates.
What are the characteristics of the chemical stability of Ammonium Polyphosphate (APP-0S)?
This product has stable chemical properties and is not easy to decompose within the pH range of 4-9. After soaking in hot water at 100℃ for 24 hours, the hydrolysis rate is only 0.5%, which is much lower than ordinary APP. It is safe with food-grade additives such as antioxidants and plasticizers, and no chemical reaction occurs after long-term storage after mixing. Under ultraviolet irradiation, the color does not change significantly and does not turn yellow, so it can maintain a beautiful appearance when used in transparent plastics. It has good high-temperature stability and does not decompose below 280℃, and can withstand the high-temperature processing technology of food packaging materials.
What is the impact of the difference in particle size between Ammonium Polyphosphate (APP-0S) and APP-0M?
Ammonium Polyphosphate (APP-0S) is mostly fine powder with a particle size of less than 0.1 mm. It is easier to disperse in polymer materials than APP-0M and is suitable for thin-walled products such as films and fibers. After addition, it does not affect the mechanical properties of the material and retains more than 90% of the tensile strength of the film. However, APP-0M is more suitable for thick-walled products such as plates and pipes due to its larger particles, and can form a thicker carbon layer when burned. The difference in particle size is like coarse and fine sandpaper. The fine one is suitable for fine processing, and the coarse one is suitable for heavy objects. Each has its own place.
What are the special requirements for the transportation of Ammonium Polyphosphate (APP-0S)?
This product needs to be packed in sealed plastic barrels, 50 kg per barrel, and the barrel cover should be equipped with a silicone sealing ring to prevent moisture during transportation. The transportation vehicle must be clean and odorless, and it must not be transported with toxic and hazardous substances. The compartment should be covered with moisture-proof paper. Avoid violent bumps during transportation to prevent the barrel from being damaged. Handle it with care during loading and unloading and do not throw it. Because it is used in food-related fields, the packaging must be cleaned and disinfected after transportation to ensure that there are no contaminants attached before it can be stored in the warehouse.
