The major component in the oil of citrus fruit peels acting as the major contributor to their flavor and aroma is the chemical substance limonene which takes its name from the peel of the lemon. Oils of Orange, grapefruit, and tangerine are among citrus-fruit oils with the highest limonene content (as high as 95 % and even more). Limonene is a chiral molecule found as the D-limonene, the R enantiomer, in citrus fruits like orange. Limonene is obtained commercially from citrus fruits especially from orange peels as a by-product in production of orange juice. Limonene has many applications especially as a flavoring agent in food industry and as a fragrance in perfumery.