1. Some authors report weak genotoxicity for allyl isothiocyanate and phenethyl isothiocyanate. 2. Some authors report weak genotoxicity for allyl isothiocyanate and phenethyl isothiocyanate . 3. Further reaction with lead ( II ) nitrate gives phenyl isothiocyanate : 4. _Broccoli spears ( allyl isothiocyanate , a carcinogen and mutagen ). 5. Horseradish contains volatile oils, notably mustard oil, and allyl isothiocyanate . 6. The characteristic pungent flavour of mustard oil is due to allyl isothiocyanate . 7. Isothiocyanates are most prevalent in radishes, horseradish, mustard greens and turnips.8. Upon exposure to the environment, metam sodium decomposes to form methyl isothiocyanate . 9. The chemicals are called isothiocyanates , which stimulate natural detoxifying enzymes in the body. 10. "Cooking drives off the isothiocyanates very quickly, " he said.