FAMILY: Burseraceae
SYNONYMS: C. erythraea var. glabrascens, bisabol myrrh, sweet myrrh.
GENERAL DESCRIPTION: A tall tropical tree, similar to myrrh (to which it is closely related), which contains a natural oleogum resin in tubular vessels between the bark and wood of the trunk. The natives make incisions in the trunk of the tree to increase the yield. The crude gum dries to form dark reddish-brown tear-shaped lumps with a sweet-woody, rootlike odour.
DISTRIBUTION: Native to East Africa (Somalia) and eastern Ethiopia (Harrar Province) where it grows wild. The essential oil production is generally carried out in the USA and Europe from the crude oleogum resin.
OTHER SPECIES: The original or ‘true’ opopanax used in perfumery was derived from a large plant Opopanax chironium or Pastinaca opopanax, a plant similar to the parsnip of the Umbelliferae family and native to the Levant region, Sudan and Arabia. The oleogum resin was obtained by cutting into the stem at the base, which then produces reddish-yellow tears of a strong rootlike, parsnip or celery-type smell. This type of opopanax is now unavailable, and has been replaced by a similar type of oil known as ‘bisabol myrrh’.
Not to be confused with cassie (Acacia farnesiana), which is also known as ‘opopanax’.
HERBAL/FOLK TRADITION: Opopanax derived from O. chironium is described as having antispasmodic, expectorant, emmenagogue and antiseptic properties, which used to be employed in asthma, hysteria and visceral afflictions. In the Far East the bisabol myrrh is used extensively as an ingredient in incense.
ACTIONS: Antiseptic, antispasmodic, balsamic, expectorant.
EXTRACTION: 1. Essential oil by steam (or water) distillation from the crude oleogum resin. 2. A resinoid by solvent extraction from the crude oleogum resin.
CHARACTERISTICS: 1. An orange, yellow or olive liquid with a sweet-balsamic, spicy, warm, animal-like odour (it does not contain a medicinal note like myrrh). It resinifies on exposure to air. 2. A solid dark mass with a warm, powdery, sweet-balsamic, rooty odour. It blends well with clary sage, coriander, labdanum, bergamot, myrrh, frankincense, vetiver, sandalwood, patchouli, mimosa, fir needle and neroli.
PRINCIPAL CONSTITUENTS: The crude contains resins, gums (50–80 per cent) and essential oils (10–20 per cent), notably the sesquiterpene ‘bisabolene’ and sesquiterpene alcohols.
SAFETY DATA: Frequently adulterated – it is more expensive than the ‘hirabol myrrh’. The commercial resinoid is also usually mixed with a solvent such as myristate, because it is otherwise unpourable at room temperatures.
AROMATHERAPY/HOME: USE Possibly similar uses to myrrh.
OTHER USES: Used as a fixative and fragrance component in high-class perfumery. Used in liqueurs to lend body and add winelike notes.