Yellow mandarin oil is cold pressed from the peel of ripe pixie mandarins, the fruit of Citrus reticulata blanco.
Mandarin Essential Oil Yellow CAS 8008-31-9
Mandarin Peel Oil is an orange-brown to dark yellowish-brown or olive-brown, occasionally lemon yellow (certain types of handpressed oil), mobile liquid of intensely sweet, not very fresh odor, occasionally with an amine-like, “fishy” topnote and usually with a rich neroli-like, floral undertone. Upon extreme dilution e.g. in ethyl alcohol, the oil shows a beautiful bluish fluorescence which fades significantly when the solution has aged.
Arctander, Steffen . Perfume and Flavor Materials of Natural Origin