[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an odorless white solid. Sinks and mixes with water. (USCG, 1999)"}, {"from": "gpt", "value": "[O-1][P][=Branch1][C][=O][Branch1][C][O-1][O-1].[O-1][P][=Branch1][C][=O][Branch1][C][O-1][O-1].[Ca+2].[Ca+2].[Ca+2]"}]