We’re counting down the days until Christmas so let’s learn something associated with the festive season. Did you know that a characteristic smell of clove, which is considered a winter spice, consists mainly of one chemical compound? Up to 90% and no less than 72% of clove essential oil is reserved for eugenol. It has a pleasant, sharp and spicy scent profile that we associate with clove. You can find eugenol as a part of other common Christmas spice – in cinnamon leaf oil in amount of over two thirds while in cinnamon bark oil there’s usually no more than 20% of it. Apart its fragrant properties eugenol also has antiseptic and mild anaesthetic values – that’s why it’s advised to temporarily chew on a clove before you get to the dentist in case of toothache. Eugenol molecule is also a starting point in obtaining vanillin through oxidation process. In perfumery you can find it as part of oriental accords. European Commission considers eugenol as one of 26 most common skin sensitizers. Its labelling is strictly regulated: it’ll be listed if exceeds 100 ppm in rinse off and 10 ppm in leave-on products.