Beryllium hydride
Beryllium hydride
中文名称:Beryllium hydride
英文名称:Beryllium hydride
CAS号:7787-52-2
分子式:BeH2
分子量:11.03
EINECS号:
Mol文件:7787-52-2.mol
Beryllium hydride 性质
| 密度 | 0.650 |
|---|---|
| 溶解度 | 与H2O反应；不溶于乙醚、甲苯 |
| 形态 | 白色无定形固体 |
| 颜色 | 白色 |
| 水溶解性 | reacts slowly with H2O, rapidly with dilute acids evolving H2(g) [MER06] |
Beryllium hydride 用途与合成方法
In the mid-1960s, considerable interest in beryllium hydride was generated by its potential use with ammonium perchlorate oxidizer in solid propellants for rockets. Beryllium hydride, BeH2 , was prepared by action of ethereal lithium-aluminum hydride with beryllium chloride. A white powder resulted from which the complete removal of ether was difficult. The hydride is not stable above 125 °C (255 °F), decomposing into beryllium and hydrogen.
Beryllium hydride is a three-dimensional polymer, considerably ionic in character and containing Be2+ and H- ions. Alternatively, it may be considered to be an electron-deficient molecule, similar to beryllium chloride and the beryllium alkyls, with hydrogen bridges between the two beryllium atoms (BeH2Be).
Three-dimensional molecule of beryllium hydride
Beryllium hydride is a three-dimensional polymer, considerably ionic in character and containing Be2+ and H- ions. Alternatively, it may be considered to be an electron-deficient molecule, similar to beryllium chloride and the beryllium alkyls, with hydrogen bridges between the two beryllium atoms (BeH2Be).
Three-dimensional molecule of beryllium hydride
类别
遇水燃烧物品 毒性分级
高毒 爆炸物危险特性
当热至220℃以上时释放爆炸性氢气;与水,甲醇,稀酸反应激烈,释放爆炸性氢气 可燃性危险特性
受热分解有毒铍氧化物烟雾; 因易放出易燃氢气, 能形成危险火灾 储运特性
通风低温干燥; 与库房食品原料,酸和甲醇分开存放 灭火剂
干粉,泡沫,二氧化碳 职业标准
TWA 0.002 毫克(铍)/立方米; STEL 0.005 毫克/立方米 