facilitate cutting of thin sections for microscopy. It is also combustible and has been considered as a biofuel. See also Monoterpenes Resin Essential oil References External links Mass spectrum of limonene Description of -limonene on the International Chemical Safety Cards -Limonene information from the United States Environmental Protection Agency Flavors Histotechnology Hydrocarbon solvents IARC Group 3 carcinogens Insecticides Monoterpenes Solvents Cyclohexenes Isopropenyl compounds