Sweet, floral, heavy aroma. There are several grades or qualities of this essential oil. The large flowers of Ylang Ylang are subjected to fractional steam distillation, yielding, in succession, ylang-ylang extra, I, II, and III. The grades (Extra, I, II and III) indicate from which fraction of the steam distillation process the oil was obtained. Ylang Ylang III is an excellent oil for aromatherapy and soapmaking. Essential Oils are highly volatile, meaning they readily evaporate, transforming from liquid to vapour. Keep your oils out of sunlight, but do not refrigerate.When deciding on a lid, there are a few things to keep in mind. Droppers are great when working on recipes, because you can count the drops, but if you store the dropper in the vial, the oil will eventually deteriorate the rubber, ruining your precious oil. So, store separately, especially if you do not use the oil promptly. Wands are good for skin application. The reducers are good for thinner viscosity oils but not for heavy oils like frankincense. Tap the bottom of the bottle to deliver the oil. Cautions: This information is for educational purposes only, it is not intended to treat, cure, prevent or, diagnose any disease or condition. Nor is it intended to prescribe in any way. Information contained on this website may not be complete or accurate. Do not use Essential Oils while pregnant and NEVER, EVER INGEST ANY ESSENTIAL OIL. As with all essential oils, never use them undiluted. Keep away from children. If applying an essential oil to your skin always perform a small patch test to an insensitive part of the body (after you have properly diluted the oil in an appropriate carrier.