產(chǎn)品描述：

磷酸氫二銨

  英文名稱Diammonium hydrogenphosphate

  CAS號: 7783-28-0 

  分子式: H9N2O4P 

  分子量: 132.06 

  別名: 磷酸二銨;二鹽基磷酸銨;磷酸銨;磷酸氫銨 

  性狀：無色透明單斜晶體或白色粉末。 易溶于水，不溶于醇、丙酮、氨。熔點(diǎn)  155 °C (dec.)(lit.),密度  1.203 g/mL at 25 °C

  質(zhì)量標(biāo)準(zhǔn)：

  項(xiàng)目Item                                                             分析純         化學(xué)純

  (AR)           (CP)

  含量((NH4)2HPO4)Assay,%                             ≥98.5         98.0

  水溶液反應(yīng)Solution reaction                               合格          合格

  澄清度試驗(yàn)Clarity                                                合格          合格

  水不溶物Insoluble matter in water,%           ≤0.005        0.01

  氯化物(Cl)Chloride,%                                      ≤0.0005       0.004

  硫化合物(以SO4計(jì))Sulfur compounds           ≤0.005        0.01

  硝酸鹽(NO3)Nitrate,%                                      ≤0.0005       0.001

  鐵(Fe)Iron,%                                                       ≤0.0005       0.002

  砷(As)Arsenic,%                                                 ≤0.0005       0.002

  重金屬(以Pb計(jì))Heavy metals,%                     ≤0.0005       0.001

  堿金屬(以磷酸鹽計(jì))Alkali metals,%                      ≤0.1          0.2

  用途：用作分析試劑、緩沖劑是一種廣泛適用于蔬菜、水果、水稻和小麥的高效肥料