Mustard Seed: Phenolic Composition and Effects on Lipid Oxidation in Oil, Oil-in-Water Emulsion and Oleogel

•p-Hydroxybenzoic and sinapic acids are the two main phenolics in white mustard seeds.•Sinapic acid was identified as sinapine, methyl and ethyl sinapate.•4-Hydroxy-3-nitrophenylacetic acid was identified as its alkyl esters.•Mustard seeds are good raw material for the recovery of value-added antioxidants.