GHS classification: Classification not possible.Classification is impossible due to lack of data. That is,in vivo, a significant increase in micronucleus occurrence frequency was observed in the rat intratracheal administration test of this substance (ITO particle),but In vitro there is no increase in the frequency of micronucleus appearance in alveolar epithelial cells of this substance (ITO particle), and in vivo results are evaluated as being due to secondary genotoxicity mechanism(Reason for proposal of acceptable concentration of Japan Industrial HealthAssociation(2013),HSDB(Access on May 2016)).There is no other information.