CAS: 7440-12-2; Promethium
MSDS等安全信息
- 危险描述Not Classified
Reported as not meeting GHS hazard criteria by 1 of 1 companies. For more detailed information, please visit ECHA C&L website. - 危险等级7
- UN编号2912
- 危险类别码All isotopes are radioactive (mass numbers = 132-155); Pm-145 has the longest half-life at 17.7 years, an alpha emitter; Present at low levels in uranium ores; [Merck Index] The stable rare earth compounds cause benign and other pneumoconioses, but Promethium is not stable. [Reference #2] Pm-147 with a half-life of 2.6 years is the most useful isotope. Pm-145 has the longest half-life; it has a specific activity of 940 Ci/g. See Radiation, Ionizing.
