As a perfume in a finished product is lets 1% on average then these material are restricted to 1% in a perfume compound formula for rinse off product (soap, shampoos etc.) or 0.1% in a perfume compound for leave-on products (perfume, creams, lotions, massage oil etc.) If an essential oil contains the material i.e. if Linalool content in Lavender oil at 4% in a perfume compounds used at 1% in rinse off products or 0.4% in leave on products this is cumulative and we must add all the sources of Linalool, synthetic and natural to arrive at the total Linalool present.