Noun
allyl isothiocyanate (uncountable)
(organic chemistry) A mildly toxic pungent compound, C3H5NCS, obtained from the seeds of black mustard (Brassica nigra) or prepared synthetically, used as an animal repellent, etc.
Allyl isothiocyanate is an unstable compound, degrading over the course of days at convert. citation Because of this instability, horseradish sauces lack the pungency of the freshly crushed roots. Source: Internet
Handpicking is an effective control strategy in home gardens. citation Culinary uses Allyl isothiocyanate is the pungent ingredient in fresh horseradish sauce. Source: Internet