Overview
Diammonium Phosphate (DAP) is an inorganic compound and one of the most common phosphate fertilizers globally. Composed of ammonium and phosphate ions, it provides essential nutrients for plant growth. Its high solubility and balanced nitrogen-phosphorus ratio make it particularly effective for alkaline soils. First produced commercially in the 1960s, DAP is now a staple in modern agriculture. While primarily used as a fertilizer, it also serves industrial purposes such as fire suppression and food production. Imported DAP (进口二铵) is often preferred in some markets due to stricter quality controls and higher nutrient consistency.
Physical and Chemical Properties
DAP appears as white crystalline granules or powder with a density of 1.619 g/cm³. It decomposes rather than melts at 155°C, releasing ammonia gas. The compound is highly water-soluble, with solubility increasing at lower temperatures—an unusual characteristic that enhances its agricultural utility. Chemically, DAP is stable under normal conditions but reacts with strong acids or bases. Its pH in solution is slightly alkaline (7.5-8.0), which can help neutralize acidic soils. The material is non-flammable but may decompose at high temperatures to produce toxic ammonia fumes.
Main Applications
Agriculture consumes over 90% of global DAP production as a highly efficient NP fertilizer. It's particularly effective for cereal crops (wheat, corn) during early growth stages due to its readily available phosphorus content. The 18-46-0 NPK ratio makes it ideal for soils testing low in phosphorus. Industrial applications include use as a fire retardant in wood products and textiles due to its ability to release phosphoric acid when heated. In food processing, food-grade DAP serves as a yeast nutrient in winemaking and bread production. Some water treatment plants employ it for corrosion control in pipe systems.
Safety and Storage
While DAP is generally safe when handled properly, dust inhalation can irritate respiratory tracts. Prolonged skin contact may cause mild irritation. Appropriate PPE—gloves, dust masks, and goggles—should be worn during bulk handling. Storage requires dry, well-ventilated areas with relative humidity below 70% to prevent caking. The material should be kept away from strong acids (releases toxic gases) and incompatible substances like calcium nitrate. Bulk storage facilities must have ammonia detection systems due to potential off-gassing at high temperatures.
B2B Procurement Guide
When sourcing imported DAP, prioritize suppliers with ISO certification for fertilizers. Key specifications to verify include minimum 46% P2O5 content, less than 4% moisture, and granular size (2-4mm preferred for agricultural use). Consider maritime shipping costs—DAP is typically transported in 50kg bags or bulk vessels. Request recent heavy metal analysis reports (especially cadmium levels) to ensure compliance with destination country regulations. For large contracts, negotiate pricing based on MAP (monoammonium phosphate) market indexes, as DAP prices typically follow MAP trends.
Related Manufacturers
- 主营：给水管、施肥桶、过滤器、磷酸二铵、水溶肥、施肥机、滴灌管、施肥器、施肥设备、施肥过滤、智能水肥、大田施肥、滴灌喷灌、复合肥料、灌溉系统、搅拌电机、灌溉设备、水肥设备、自来水管、气象检测、智慧泵房、滴灌设备、农业滴灌、不锈钢框架、水肥一体机、高标准农田
- 主营：冲施肥、水溶肥、生根剂、进口水溶肥、进口叶面肥、海藻肥、海藻精、高钾肥、果树专用肥、螯合钙、发酵剂、甲壳素、特种肥、em复合菌、果树辣椒、提苗缓苗、鱼蛋白生根肥、微生物菌剂、膨果增甜上色、蔬菜专用肥、糖醇钙、大量元素水溶肥、土壤调理剂、磷酸二氢钾、亚磷酸钾
- 主营：钼酸钠、钨酸钠、七钼酸铵、工业级柠檬酸、食品级柠檬酸、工业级柠檬酸钠、食品级柠檬酸钠、四钼酸铵、磷化肥、工业级钨酸钠、工业级亚硫酸氢钠、工业级过硫酸钠、四水合七钼酸铵、工业级钼酸钠、柠檬酸铵、工业级柠檬酸三铵、羧甲基纤维素钠、六偏磷酸钠、对甲基苯磺酸钠、格兰汉姆盐、4-甲基苯磺酸、二氧化硫脲、三聚磷酸钠、玉米淀粉
- 主营：水分保持剂、酸度调节剂、三聚磷酸钠、磷酸氢二铵、磷酸二氢钾、焦磷酸二氢二钠、工业磷酸、添加剂饲料、食品磷酸、三水磷酸氢二钾、无水磷酸氢二钾、精品磷酸二氢钾、磷酸三钠、磷酸二氢钠、磷酸氢二钠、磷酸二氢铵、焦磷酸钠、磷酸盐、焦磷酸一氢三钠、化肥
- 主营：四钠、乙二胺四乙酸、EDTA镁钠、晶体二铵、EDTA锌钠、EDTA铁钠、TDTA铜钠、EDTA钙钠、EDTA锰钠、二钠、三钠、鱼蛋白、黄腐酸钾颗粒、磷酸二氢钠、磷酸氢二钠、三聚磷酸钠、磷酸三钠、焦磷酸二氢二钠、磷酸氢二钾、海藻精、铁钠、镁钠、卡松防腐剂
- 主营：氧化剂、消毒剂、冰醋酸、磷酸二铵、辉腾化工、大棚氮肥、复配液体、腐殖酸钠、农业肥料、农用氮肥、过碳酸钠、氨基酸原粉、熏蒸剂颗粒、过氧碳酸钠、硫酸铜供应商
- 主营：过硫酸铵、过硫酸钠、过硫酸钾、磷酸二铵、沉淀硫酸钡、草酸、片碱、大苏打、氯化钾、纯碱、滑石粉、氯化镁、硫酸镁、聚合氯化铝、硫酸亚铁、硫化钡、氯化钡、聚丙烯酰胺、碳酸钡、尿素、硼酸、硼砂、氯化钙、工业盐、磷酸二氢铵、碳酸钙
- 主营：氯化亚铁、对甲苯磺酸、十溴二苯乙烷、磷酸氢二铵、硼酸锌、促进剂DMP-30、叔丁基过氧化氢TBH、木材防腐剂ACQ、癸二酸二辛酯DOS、磷酸三乙酯TEP、硫酸锆、有机锡T12、三羟甲基丙烷、K54促进剂、N-甲基吡咯烷酮、雕白粉、衣康酸、酚醛树脂2402、氢氧化铝、溴酸钠、吊白块
- 主营：无水柠檬酸、柠檬酸钠、柠檬酸钾、磷酸二铵、磷酸氢二钠、硫酸铵、磷酸二氢钾、磷酸氢二钾、磷酸三钠、氢氧化钾
- 主营：架桥剂、YW100 锂萃取剂、端羧基液体丁腈橡胶、乙酰磷酸二铵、10-羟基癸酸、苯乙烯磷酸、肉豆蔻酸镁、硬脂酸钴、全氟三丁胺、乙烯基磷酸二乙酯、磷酸锰铁锂、β-磷酸三钙、十一烯酸、钨酸铝、1-乙炔基环已醇、间二异丙苯、锂硅合金、溴甲酚绿、生物活性玻璃、溴代海因树脂颗粒、红铝、龙涎酮、原丁酸三甲酯
- 主营：甘氨酸、水苏糖、阻燃剂、二铵盐、硫酸锌、硫酸锆、硫酸锂、硫酸锶、硫酸锰、铝酸锌、1680-21-3、牛磺酸、褪黑素、磷酸铁、丙酸铵、苏云金、碳酸镁、麝香酮、肉桂醛、磷酸铝、王浆酸、椰油胺、赖氨酸、增塑剂、浸膏粉、乙氧基
- 主营：化学品、香精香料、试剂、柠檬酸氢二铵、中间体、有机硅、橡胶树脂、催化剂、纳米材料
- 主营：阻燃剂、催化剂、水杨酸、二苯基、酰亚胺、正磷酸、烟酰胺、曲酸粉、氯化锌、异丙醇、化妆品、初油酸、脂肪醇、生石灰、甲基异、碳酸锌、碳酸锂、活性炭、乙二胺、三氮唑、着色剂、环己酮、防冻液、抗氧剂、亚磷酸
- 主营：杜仲素、对位酯、丙烯酸酯、磷酸氢二铵、二氧化硫脲、乙基麦芽酚、饲料添加剂、油酸基硬脂酸、二苯基硅二醇
- 主营：有机原料、中间体、香精香料、催化剂、有机硅、表面活性剂
- 主营：异丙醇、冰醋酸、化工原料、磷酸氢二铵、正庚烷、甲基环己烷、乙二醇、苯酚、江苏异丙醇、江苏化工原料、工业吡啶、工业苯酚、正丁醇、MIBK、无水乙醇、正己烷
- 主营：防冻液、冰醋酸、乙二醇、磷酸氢二铵、冰乙酸、纯吡啶、丙二醇、羟基苯、14丁二醇、3-丙三醇、四氢呋喃、环保乙腈、化工苯酚、1.4丁二醇、医用苯酚、工业苯酚、精制苯酚、价位四氢、乙腈工业、乙酸乙酯、吡啶化工、甲酸乙酯、吡啶工业、求购苯酚、高纯三氯、实验乙腈