Cytotoxicological experiment and rat dust exposure experiment showedthat brown alundum dust may damage macrophage and may cause slight fibro-sis,but much less than that caused by aluminum oxide.

• 细胞毒性实验及大鼠染尘实验,均表明棕刚玉粉尘对巨噬细胞有破坏及有轻度致纤维化作用,但较三氧化二铝为轻。