[{"from": "human", "value": "Provide a brief overview of this molecule. [O][P+1][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule appears as a white or yellow crystalline solid (melting point 70.1 deg C) or a solution of the solid. Density 1.651 g /cm3. Contact may severely irritate skin, eyes, and mucous membranes. Toxic by ingestion, inhalation and skin absorption."}]