[{"from": "human", "value": "What can you tell me about this molecule? [O][P][=Branch1][C][=O][Branch1][C][O][O-1].[K+1]"}, {"from": "gpt", "value": "The molecule is a soluble salt of potassium and the dihydrogen phosphate ion.  It is a source of phosphorus and potassium as well as a buffering agent. It can be used in fertilizer mixtures to reduce escape of ammonia by keeping pH low."}]