ISO 3757:1978

Oil of patchouli

The Standard specifies the following characteristics of the oil. Appearance: Liquid, more or less viscous. Colour: Reddish-brown to greenish-brown. Odour: Characteristic, leafy, slightly camphoraceous. Relative density at 20/20 °C: 0,955 – 0,983. Refractive index at 20 °C: 1,5050 – 1,5120. Optical rotation at 20 °C: Range from – 66 to – 40 (exceptionally, to – 32 ). Miscibility with 90 % (V/V) ethanol at 20 °C: 1 : 10. Acid value: Maximum 4,0. Ester value: Maximum 10.