[{"from": "human", "value": "Describe this molecule. [C][C][=Branch1][C][=O][O-1].[NH4+1]"}, {"from": "gpt", "value": "The molecule is an ammonium salt obtained by reaction of ammonia with acetic acid. A deliquescent white crystalline solid, it has a relatively low melting point (114\u2103) for a salt. Used as a food acidity regulator, although no longer approved for this purpose in the EU. It has a role as a food acidity regulator and a buffer. It is an acetate salt and an ammonium salt."}]