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本文报道了稀土精矿粉尘经口的急性毒性、气管注入毒性及致畸胎毒性。实验结果表明,小鼠经口灌胃给予15,000mg/kg,未导致死亡;大鼠气管注入经一年观察,光镜和电镜下发现可致肺脏纤维化改变,属于中等危害程度;对孕鼠的妊娠、胚胎和胎鼠的生长发育均无不良影响。
This article reports the acute oral toxicity of tracer concentrate dust, tracheal injection toxicity and teratogenic toxicity. The results showed that mice were orally administered 15,000mg / kg, did not cause death; rat tracheal injection after a year of observation, under light and electron microscopy can cause lung fibrosis, which is a moderate degree of harm; pregnant rats Of pregnancy, embryos and fetal rat growth and development have no adverse effects.