[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule appears as an aqueous solution of a solid. Toxic by ingestion, inhalation or skin absorption. Used as an antiseptic, in insecticides and herbicides, to preserve hides and in making dyes."}, {"from": "gpt", "value": "[O-1][As][=O].[Na+1]"}]