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EC number: 215-200-5 | CAS number: 1312-81-8; 7439-91-0
One case of a chest x-ray aparently showing dust deposits in the lung without an impairment of lung fuction, clincal chemistry parameters and other clincal signs was described in a worker occupationally handling rare earth concentrates for more than 10 years. Another worker with comparable work history had a normal chest x-ray result. Exposure was to a mixture of metal and other inorganic components, but the level of exposure was not determined. No causal relationship to lanthanium oxide expsoure can be established from this study.
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