磷酸二铵

磷酸氢二铵(DAP)

别 名:磷酸二铵
英文名称:di-ammonium phosphate
CAS号:7783-28-0
分 子 式:(NH4)2•HPO4
分 子 量: 132.06
物化性质:无色透明单斜晶体或白色粉末。相对密度 1.619,易溶于水,不溶于醇、丙酮、氨。加热至155℃分解。露置空气中逐渐失去氨而成磷酸二氢铵。水溶液呈碱性,1%溶液PH值为8.与氨水反应生成磷酸三铵。
包 装:内塑外编袋,每袋25Kg或50Kg,贮于通风干燥处。按客户要求。
用 途:肥料级主要用作高浓度氮磷复合肥料。工业级用于浸渍木材及织物以增加其耐久性;可作干粉灭火剂,荧光灯用的磷素;还用于印刷制版,电子管、陶瓷、搪瓷等的制造,废水生化处理;军工用作火箭发动机马达隔热材料的阻燃剂。
技术指标:
项 目 指 标
工业级 食品级
主含量【(NH4)2HPO4】 %≥ 98.0 98.0
五氧化二磷(P2O5) %≥ 52.70 53.00
氮(N) %≥ 21.00 21.00
PH值 7.8-8.5 7.8-8.5
氟化物 %≤ ---- 0.001
砷(As) %≤ ---- 0.0003
重金属(Pb) %≤ ---- 0.001
水不溶物 %≤ 0.1 0.1
水份 %≤ 0.2 0.2
外观 无色透明单斜晶体


 



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