[{"from": "human", "value": "What can you tell me about this molecule? [O-2].[O-2].[Cr+4]"}, {"from": "gpt", "value": "The molecule is a synthetic magnetic substance once widely used in magnetic tape emulsion. With the increasing popularity of CDs and DVDs, the use of chromium(IV) oxide has declined. However, it is still used in data tape applications for enterprise-class storage systems. It is still considered today by many oxide and tape manufacturers to have been the most optimal magnetic recording particulate ever invented. A single study indicates that inhalation exposure to Cr(IV) (as CrO2) does not have significant adverse effect on the blood system."}]