COMPARATIVE TOXICITY OF NICKEL-OXIDE, NICKEL SULFATE HEXAHYDRATE, AND NICKEL SUBSULFIDE AFTER 12 DAYS OF INHALATION EXPOSURE TO F344/N RATS AND B6C3F1 MICE

被引:41
作者
DUNNICK, JK [1 ]
BENSON, JM [1 ]
HOBBS, CH [1 ]
HAHN, FF [1 ]
CHENG, YS [1 ]
EIDSON, AF [1 ]
机构
[1] LOVELACE INHALAT TOXICOL RES INST, ALBUQUERQUE, NM 87185 USA
关键词
D O I
10.1016/0300-483X(88)90087-X
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
The relative toxicity of nickel oxide (NiO), nickel sulfate hexahydrate. (NiSO4 .cntdot. 6H2O), and nickel subsulfide (Ni3S2) was studied in F344/N rats and B6C3F1 mice after inhalation exposure for 6 h/day, 5 days/week for 12 exposure days. Exposure concentrations used (as mg Ni/m3) were 0.9-23.6 for NiO, 0.8-13.3 for NiSO4 .cntdot. 6H2O, and 0.4-7.3 for Ni3S2. For each compound there were 5 exposure groups plus a control group. NiSO4 .cntdot. 6H2O was the most toxic compound with exposure related mortality seen at exposure concentrations of 13.3 mg/m3 in rats and 1.6 mg/m3 and above in mice. For Ni3S2, mortality was seen in mice (but not in rats) at the highest exposure concentration (7.3 mg/m3). No mortality was seen after NiO exposure. Lesions of the lung and nasal cavity were seen in both rats and mice after exposure to NiSO4 .cntdot. 6H2O and Ni3S2 at the 4 highest exposure concentrations. Lesions of the lung were seen primarily at the highest exposure concentrations after NiO exposure. The amount of nickel in the lungs at the end of exposure varied in relation to the water solubility of the compounds. Based on these 2-week studies, the toxicity ranking was NiSO4 .cntdot. 6H2O > Ni3S2 .mchgt. NiO. Additional studies are in progress to assess the relative toxicities of these three nickel compounds after 90-day exposures.
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页码:145 / 156
页数:12
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