The Standard specifies the following characteristics of the oil. Appearance: Mobile liquid. Colour: Pale yellow to brown. Odour: Spicy, resembling eugenol. Relative density at 20/20 °C: 1,027 – 1,048. Refractive index at 20 °C: 1,5250 – 1,5400. Optical rotation at 20 °C: Range from – 5 to 0 . Solubility in 70 % (V/V) ethanol at 20 °C: 1 : 2. Phenols content: Minimum 65 % (V/V).