Limonene is a colorless liquid found in large quantity in essential oils of pine and citrus trees. It is used as lemon like odorant in industrial and household products and also as a chemical intermediate. It exists in two isomeric forms called L-limonene and d-limonene. The o-limonene is the isomer which rotates the plane of polarized light counterclockwise and d-limonene is the isomer that causes rotation in the opposite direction .When Citrus Fruits are extracted d-limonene is obtained as a by-product. It also happens in caraway oil. L-limonene is found in abundance in pine needles and cones and d-limonene or the dipentene is the mixture of same amount of L and D isomers and this is a components of turpentine

Name : L-limonene
Chemical Name : P-Mentha 1, 8-diene
Chemical Formula : C10H16
Appearance : Light Liquied
Molecular Weight: 136.26
Odor : Refreshing Odor
Specific gravity : 1.470 to 1.474 AT 20 Degree C
Color : Colorless