[{"from": "human", "value": "Please give me some details about this molecule. [O].[O].[O].[O].[O].[O].[O-1][S][=Branch1][C][=O][=Branch1][C][=O][O-1].[O-1][S][=Branch1][C][=O][=Branch1][C][=O][O-1].[Cr+3].[Cr+3].[Cr+3]"}, {"from": "gpt", "value": "The molecule is responsible for the purple color of this salt. It is widely used in the tanning of leather, with associated environmental damage. Chromium is most toxic in its +6 oxidation state (chromium(VI)) due to its greater ability to enter cells and higher redox potential. Trivalent chromium (chromium(III)) however, is biologically necessary for sugar and lipid metabolism in humans. (L17, L524)"}]