[{"from": "human", "value": "Provide a description of this molecule. [O-1][P][=Branch1][C][=O][=O].[K+1]"}, {"from": "gpt", "value": "The molecule is a potassium salt of metaphosphoric acid. It has a role as a fertilizer, a buffer, a food emulsifier, a raising agent and a sequestrant. It is an inorganic phosphate and a potassium salt. It contains a trioxidophosphate(1-)."}]