Terpenes are hydrocarbons - organic compounds made up of hydrogen and carbon - mainly from plants, and the main constituent of essential oils derived from oranges, lemons, other citrus, lavender, thyme, cedarwood, pine, and other plants, flowers, and trees. One of the most widely used terpenes is d-Limonene from citrus. Terpene and d-Limonene cleaners are effective oil solvents and hence have often been chosen to replace more hazardous cleaning formulations.
