Terpenes are very large class of most abundant natural hydrocarbons and commonly occur in higher plants as constituents of essential oils and other secondary metabolites. The fundamental building block of terpenes is the isoprene unit (2-methyl-1,3-butadiene) linked in a head-to-tail fashion and is represented by general structural formula (C5H8)n where "n" is the number of linked isoprene units. Terpenoid phytochemical substances are classified into several classes depending on the number of isoprene units in the structure, so they are classified in our terpene reference materials catalog:
monoterpenes (2 units - C10)
sesquiterpenes (3 units - C15)
diterpenes (4 units - C20)
triterpenes (6 units - C30)
Linear tetraterpenes (8 units - C40) includes the carotenoids.
We offer a large list of terpene standards of any type of these terpenoids.