Diammonium Phosphate Industrial Grade DAP
| HS Code | 709494 |
| Chemical Formula | (NH4)2HPO4 |
| Molecular Weight | 132.06 g/mol |
| Appearance | white crystalline powder or granules |
| Solubility In Water | highly soluble |
| Ph Of Aqueous Solution | around 7.5 - 8.5 |
| Ammonia Content N | about 21% |
| Phosphorus Content P2o5 | about 53% |
| Density | 1.619 g/cm³ |
| Melting Point | 155 °C (decomposes) |
| Stability | relatively stable under normal conditions |
| Hygroscopicity | hygroscopic |
As an accredited Diammonium Phosphate Industrial Grade DAP factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Diammonium Phosphate Industrial Grade DAP is packed in paper bags lined with moisture-proof film and sealed with ropes. The weight of each bag is in accordance with market regulations to ensure tightness. |
| Storage | Store Diammonium Phosphate Industrial Grade DAP in a dry and ventilated place, away from moisture and high temperature, and stack them in an orderly manner for easy access. |
| Shipping | When transporting Diammonium Phosphate Industrial Grade DAP, it is necessary to protect it from the sun and rain, handle it gently, do not let the packaging break or leak, and separate it from other items. |
Competitive Diammonium Phosphate Industrial Grade DAP 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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Tel: +8615380400285
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Historical Development
The development of Diammonium Phosphate Industrial Grade DAP is closely linked to the progress of agriculture and chemical industry. In ancient times, farmers knew the importance of fertilizers to crops, but they suffered from the lack of efficient fertilizers. Later, as chemical knowledge gradually became richer, people realized that nitrogen and phosphorus elements were key to plant growth, and began to explore compounds containing these elements. After years of research and practice, the preparation method of DAP was finally mastered. From the initial small-scale local production to today's large-scale industrial manufacturing, the process has been continuously innovated, and the output and quality have been greatly improved. It is widely used in many fields such as agriculture and industry.
Product Overview
Diammonium Phosphate Industrial Grade DAP is a white crystalline powder or granule, odorless, slightly salty and astringent. It is easily soluble in water, and its aqueous solution is weakly alkaline. In agriculture, it is an efficient compound fertilizer that provides nitrogen and phosphorus nutrients, helping crops to thrive and increase yields; in industry, it also has many uses and is a multifunctional chemical product.
Physical & Chemical Properties
In terms of physical properties, Diammonium Phosphate Industrial Grade DAP has a high melting point, low hygroscopicity, and regular crystal morphology. It is chemically stable, but when placed in an acidic or alkaline environment, it can react chemically, release or combine corresponding ions, and provide necessary nutrients for plant growth.
Technical Specifications & Labeling
Technical Specifications has clear standards for the nitrogen and phosphorus content, moisture content, particle size and other indicators of Diammonium Phosphate Industrial Grade DAP. When labeling, clearly mark the product name, specifications, nutrient content, manufacturer, production date, shelf life, and implementation standards in a prominent position on the package, and use eye-catching warning information such as "moisture-proof" and "keep away from alkaline substances" to facilitate use and supervision.
Preparation Method
Diammonium Phosphate Industrial Grade DAP is usually prepared with phosphoric acid and liquid ammonia as raw materials. Phosphoric acid and liquid ammonia are introduced into a special reactor in precise proportions, and neutralization reaction is carried out at appropriate temperature and pressure. After the reaction, the finished product is obtained through concentration, crystallization, drying and other processes. The whole process requires strict control of the raw material ratio, reaction temperature, pressure and time. Any slight deviation will affect the product quality.
Chemical Reactions & Modifications
Diammonium Phosphate Industrial Grade DAP dissolves in water and ionizes ammonium ions and phosphate ions, which can be absorbed and utilized by plant roots. When mixed with other chemical substances, double decomposition reactions can occur to generate new compounds. By adding special additives or improving the production process, it can be modified to meet different needs, such as improving fertilizer efficiency and solubility.
Synonyms & Product Names
The Synonyms of Diammonium Phosphate Industrial Grade DAP include diammonium hydrogen phosphate, etc. Although the names are different in different regions, industries or literature, they all refer to this industrial grade diammonium hydrogen phosphate product.
Safety & Operational Standards
When using and operating Diammonium Phosphate Industrial Grade DAP, operators must wear protective clothing, gloves, masks and other protective equipment to avoid contact with skin and eyes. In case of accidental contact, rinse immediately with plenty of water and seek medical help if necessary. Storage and transportation must comply with relevant regulations, and the workplace should be kept ventilated and equipped with fire-fighting facilities to prevent accidents.
Application Area
In the agricultural field, Diammonium Phosphate Industrial Grade DAP is used as a base fertilizer and topdressing fertilizer to provide sufficient nitrogen and phosphorus nutrients for various crops, enhance crop resistance, and improve crop yield and quality; in the industrial field, it is used in the production of flame retardants to give materials fire resistance; it is used in water treatment to purify water quality; it can also be used as a food additive to play a unique role, and its application prospects are very broad.
Research & Development
Currently, the research and development of Diammonium Phosphate Industrial Grade DAP continues to deepen. Researchers are committed to optimizing production processes, reducing energy consumption, and reducing environmental pollution; developing new modified products to improve fertilizer utilization; exploring its application possibilities in emerging fields such as new energy and biomedicine, and expanding the application boundaries of products.
Toxicity Research
Toxicity Research shows that Diammonium Phosphate Industrial Grade DAP has low toxicity and has little harm to the human body and the environment when used normally. However, large-scale intake or long-term exposure to high-concentration products may affect human health. Safety regulations must be followed when using it, and protective measures must be taken.
Future Prospects
The future prospects of Diammonium Phosphate Industrial Grade DAP are bright. The process of agricultural modernization is accelerating, and the demand for high-efficiency fertilizers continues to grow; the industrial field is constantly innovating and new applications are constantly being developed. In addition, driven by technological innovation, its output and quality will be further improved, and product performance will be continuously optimized. It is expected to play an important role in more fields, and the market prospects are extremely promising.
Where to Buy Diammonium Phosphate Industrial Grade DAP in China?
As a trusted Diammonium Phosphate Industrial Grade DAP 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 Diammonium Phosphate Industrial Grade DAP 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 Diammonium Phosphate Industrial Grade DAP come from?
This product is made from phosphoric acid and ammonia. Take phosphoric acid and place it in a stone reaction tank. Slowly pass ammonia gas through a bamboo tube, stirring with a wooden paddle while passing it, so that the two can fully dissolve. At first, the solution is slightly warm, and gradually boils. When the bubbling slows down, take the test solution and drop it on the comfrey paper. The paper turns dark purple, which means the reaction is about to succeed. At this time, stop the gas, transfer the solution to a copper plate and evaporate it until it is as thick as a paste. Pour it into a wooden mold and cool it. After it solidifies into blocks, break it up and dry it with hot air to get Diammonium Phosphate Industrial Grade DAP. The method is similar to boiling sugar to make honey. The heat and ratio must be accurate. Too much ammonia will make it fishy, and too much phosphoric acid will make it sour, both of which are not good products.
What is the shape and properties of Diammonium Phosphate Industrial Grade DAP?
It mostly appears as gray-white particles, the size of peas, solid and round, with little broken powder. It is slightly shiny and the cross-section is fine and free of impurities. It is hard and brittle, and can be easily broken into pieces when pinched with fingers. It likes water and dissolves quickly when in contact with water. Its aqueous solution is weakly alkaline and tastes slightly astringent. It has strong hygroscopicity and will deliquesce and clump after being placed in a wetland for three days, so it needs to be strictly kept away from moisture. It releases ammonia gas when it meets strong alkali, and the smell is very pungent, so it cannot be stored with lime or caustic soda. It is stable at high temperatures, and decomposes into phosphoric acid and ammonia when burned, so the place where it is stored needs to be far away from fire sources.
Where can Diammonium Phosphate Industrial Grade DAP be used?
In industry, it is an essential flame retardant. When added to plastics and rubber, it will form a phosphoric acid film when in contact with fire to prevent the spread of fire; in water treatment, it can adjust the pH value and cause impurities in the water to condense and settle. In agriculture, it is the best choice of compound fertilizer, containing nitrogen and phosphorus. When applied to wheat fields, the seedlings are strong and the ears are full; when applied to orchards, the fruits are large and colorful, especially suitable for soils lacking phosphorus. In addition, it can be used as an adhesive in refractory materials to make bricks compact and resistant to high temperatures; in the fermentation industry, it is a nutrient for microorganisms to promote their reproduction. It is used like a spring, which can be poured as needed, and can moisten all things and help them grow.
How should Diammonium Phosphate Industrial Grade DAP be stored?
It should be packed in thick plastic bags, each bag weighing 50 kilograms, and the bag mouth should be tied tightly with a rope, and wrapped with a woven bag on the outside. Store it in a high and dry warehouse, with wooden boards on the ground and oil paper on the boards to keep the materials one foot off the ground. The stack height should not exceed eight layers to prevent the bottom layer from being compressed and agglomerated. The warehouse needs to be well ventilated, and lime jars should be placed in several places to absorb moisture. During the rainy season, windows should be opened every day for ventilation. Choose a sunny day for transportation, and lay a tarpaulin in the carriage to prevent moisture. Stop the car in case of rain and avoid it. Do not drive in the rain. If it agglomerates, it can be crushed in a stone mortar, but the fertilizer effect will not be reduced, but it is inconvenient to use. Therefore, the key to storage is to prevent moisture and humidity.
What is the difference between Diammonium Phosphate Industrial Grade DAP and Food Grade DAP?
The two have the same name but are actually different, mainly in purity. Diammonium Phosphate Industrial Grade DAP contains a small amount of impurities such as iron and aluminum, and can only be used in industry and agriculture; food grade DAP has been purified multiple times, with very few impurities, and can be added to food as a leavening agent. In appearance, industrial grade DAP is grayish, while food grade DAP is pure white. In terms of manufacturing method, industrial grade DAP uses crude phosphoric acid as raw material, while food grade DAP uses refined phosphoric acid. The uses are also different, industrial grade DAP helps with combustion and fertilizes the fields, while food grade DAP increases looseness and keeps it brittle. Like coarse cloth and silk, they are both fabrics, but they are different in fineness and use, so they should not be confused.
