ISO 855:1981

Oil of lemon, Italy, obtained by expression

The oil must be a mobile clear liquid which may become cloudy by lowering the temperature. The colour has to be pale yellow to pale greenish-yellow, the odour characteristic of fresh pericarp of lemon. The following characteristics shall not exceed the range indicated. Relative density at 20/20 °C: 0,849 – 0,858; refractive index at 20 °C: 1,4740 – 1,4760; optical rotation at 20 °C: + 57 to + 65 ; residue on evaporation: 1,6 – 3,9 %; acid value: maximum 3,0; carbonyl value: 11 – 17; CD value: 0,450 – 0,950; CD/DE ratio: 0,46 – 0,57.