Allyl isothiocyanate is a volatile sulfur-containing compound formed enzymatically from glucosinolates such as sinigrin in cruciferous plants including mustard, horseradish, and wasabi. It is responsible for the sharp pungent aroma and flavor of these spices. The compound exhibits strong volatility at room temperature, contributing to its rapid release upon tissue damage. It possesses antimicrobial, antifungal, and potential chemopreventive properties through induction of phase II detoxification enzymes. Used as a food flavoring agent, it requires careful handling due to its irritant effects on mucous membranes. Solubility is limited in water but high in organic solvents and lipids, facilitating its use in emulsions and extracts.