Black mustard seeds are cultivated for their oil, which is used as a condiment, illuminant, lubricant, and in soaps. The seeds contain sinigrin, a thioglycoside that produces the pungent allyl isothiocyanate when broken down by the enzyme myrosin. Black mustard is mixed with white mustard to make mustards used in various condiments. The oil is also used in repellents for cats and dogs.