ISO 590:1981

The oil shall be a clear mobile liquid which may become cloudy or crystalline at low temperatures. The colour shall be yellow to brownish-yellow, the odour characteristic, recalling safrole. The relative density at 20/20 °C has to ly between 1,082 and 1,094 and the refractive index at 20 °C between 1,5330 and 1,5370. The optical rotation shall range from - 0,50 to + 3,0 . The miscibility with 90 % (V/V) ethanol at 20 °C shall be 1 volume in 2 volumes to give a clear solution. The freezing point shall ly between 7,5 °C and 9,5 °C. Sampling and testing of the characteristics specified have to be carried out according to the corresponding ISO-Standards.