外观
|
colorless powder (alpha form) red-brown crystal (beta form)
|
能隙
|
2.5 eV
|
沸点
|
1559 °C (sublimation)
|
标准摩尔生成焓 (ΔfHo298)
|
-258 kJ·mol-1
|
密度
|
8.150 g/cm3(crystalline), 6.95 g/cm3 (amorphous) solid.
|
电子迁移率
|
531 cm2/V s
|
闪点
|
Non-flammable
|
磁化率
|
-3×10-5 cm3/mol
|
熔点
|
900–1000 °C (decomposition of amorphous form)
|
标准摩尔熵 (So298)
|
55 J·mol-1·K-1
|
折射率
|
2.49
|
溶解度
|
insoluble in water
|
溶解度
|
degrades in acid and alkaline
|
热导率
|
0.7 W/m-K
|
欧盟危险品索引
|
048-002-00-0
|
欧盟危险性物质标志
|
Carc. Cat. 2
|
欧盟危险性物质标志
|
Muta. Cat. 3
|
欧盟危险性物质标志
|
Repr. Cat. 3
|
欧盟危险性物质标志
|
Very toxic (T+)
|
欧盟危险性物质标志
|
Dangerous for the environment (N)
|
半数致死量
|
72 mg/kg (oral, rat)
|
NFPA704
|
|
危险公开号
|
R45, R26, R48/23/25, R62, R63, R68, R50/53
|
RTECS编号
|
EV1925000
|
安全公开号
|
S53, S45, S60, S61
|
联合国危险货物编号
|
2570
|