一、化学名：多聚磷酸铵，聚磷酸铵，缩聚磷酸铵
二、分子式：(nh4po3)n
三、分子量：149.087
四、cas：68333-79-9
五、性状：白色细小结晶、粉末或玻璃状片晶。为线形缩聚磷酸的铵盐非均相混合物。聚合度分低聚、中聚、高聚三种。聚合度愈大，水溶性愈小。按结构可分为结晶型和无定形型，结晶态为水不溶性。
六、用途：可用作乳化剂；稳定剂；螯合剂；组织改进剂；酵母食料；腌制助剂；水结合剂。用于干酪等。也为无机添加型阻燃剂，用于制造阻燃涂料、阻燃塑料和阻燃橡胶制品等。
七、包装：内衬聚乙烯塑料袋，外套复合塑料编织袋包装，每袋净重25kg。
八、贮存与运输：本品应贮存在干燥通风清洁的库房中，装载运输时要轻装轻放，防止包装破损，防止受潮、受热，运输过程中防止雨淋受潮，应与有毒物品隔离。
| 质量指标 | specification | jecfa |
| ins no. 452(v) | ||
| 含量（p2o5）,w/% | content(p2o5), w/% | 55.0-75.0 |
| ph | ph | 4.0-7.0 |
| 环磷酸盐（p2o5）,w/% ≤ | cyclic phosphate(p2o5), w/% ≤ | 8 |
| 氟化物（以f计），mg/kg ≤ | fluorides (as f),mg/kg ≤ | 10 |
| 砷（as），mg/kg ≤ | arsenic(as),mg/kg ≤ | 3 |
| 铅（pb），mg/kg ≤ | lead (pb),mg/kg ≤ | 4 |
1、chemical name: ammonium polyphosphate
2、molecular formula: (nh4po3)n
3、molecular weight: 149.087
4、cas: 68333-79-9
5、character: it is white fine crystal, powder or glassy flake. it is a heterogeneous mixture of ammonium salts of linear polycondensation phosphoric acid. the polymerization degree is divided into three types: oligomerization, middle polymerization and high polymerization. the greater the polymerization degree, the smaller the water solubility. according to the structure, it can be divided into crystalline type and amorphous type, and the crystalline state is water insoluble.
6、usage: it can be used as emulsifier; stabilizer; chelating agent; tissue improver; yeast food; salting aid; water binder. used for cheese and so on. it is also an inorganic additive flame retardant, which is used to make flame retardant coatings, flame retardant plastics and flame retardant rubber products.
7、packing: it is packed with polyethylene bag as inner layer, and a compound plastic woven bag as outer layer. the net weight of each bag is 25kg.
8、storage and transport: it should be stored in a dry and ventilative warehouse, kept away from heat and moisture during transportation, unloaded with care so as to avoid damage. furthermore, it must be stored separately from poisonous substances.