Ammonium benzoate, NH₄C₇H₅O₂,  a white solid, is the ammonium salt of benzoic acid.  A coarse, white powder, ammonium benzoate is used in the coatings industry as a cost-effective, amine-free flash rust inhibitor for ferrous substrates.

Ammonium benzoate is also used as a preservative in certain adhesives and rubber latex and is commonly used as industrial preservative for paper wrappers, an agent for reducing curing time in vulcanization of rubber and an analytical reagent for various elements.