Sinapic acid is an hydroxycinnamic acid derivative that occurs naturally in Brassicaceae species.Sinapic acid can be used:• As a potent peroxynitrite (ONOO−) oxidant scavenger for the protection of the cellular constituents against peroxynitrite cytotoxic species.• In the synthesis of antioxidant hydroxycinnamic acid xylan esters via esterification reaction.• In the synthesis of pseudo-cinnamic derivatives effective against mycobacterium tuberculosis;Sinapic acid is an hydroxycinnamic acid derivative that occurs naturally in Brassicaceae species.Sinapic acid can be used:• As a potent peroxynitrite (ONOO−) oxidant scavenger for the protection of the cellular constituents against peroxynitrite cytotoxic species.• In the synthesis of antioxidant hydroxycinnamic acid xylan esters via esterification reaction.• In the synthesis of pseudo-cinnamic derivatives effective against mycobacterium tuberculosis