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Other Names: Olibanum, Hebrew: levona], Arabic: al-luban.
Frankincense is an aromatic resin used in incense and perfumes, obtained from trees of the genus Boswellia in the family Burseraceae, particularly Boswellia sacra (syn: B. bhaw-dajiana), B. carterii33, B. frereana, B. serrata (B. thurifera, Indian frankincense), and B. papyrifera. The English word is derived from Old French “franc encens” (i.e., high quality incense)
There are four main species of Boswellia that produce true frankincense. Resin from each of the four is available in various grades. The grades depend on the time of harvesting; the resin is hand-sorted for quality.
Frankincense is tapped from the scraggy but hardy trees by slashing the bark, which is called striping, and allowing the exuded resin to bleed out and harden. These hardened resins are called tears. There are several species and varieties of frankincense trees, each producing a slightly different type of resin. Differences in soil and climate create even more diversity of the resin, even within the same species. Boswellia sacra trees are considered unusual for their ability to grow in environments so unforgiving that they sometimes grow out of solid rock. The initial means of attachment to the rock is unknown, but is accomplished by a bulbous disk-like swelling of the trunk. This growth prevents it from being ripped from the rock during violent storms. This feature is slight or absent in trees grown in rocky soil or gravel. The trees start producing resin when they are about eight to 10 years old. Tapping is done two to three times a year with the final taps producing the best tears due to their higher aromatic terpene, sesquiterpene and diterpene content. Generally speaking, the more opaque resins are the best quality. Fine resin is produced in Somalia, from which the Roman Catholic Church purchases most of its stock.
These are some of the chemical compounds present in frankincense:
* “Acid resin (56 %), soluble in alcohol and having the formula C20H32O4”
*Gum (similar to gum arabic) 30–36%
*3-Acetyl-beta-boswellic acid (Boswellia sacra)
*Alpha-boswellic acid (Boswellia sacra)
*4-O-methyl-glucuronic acid (Boswellia sacra)
*Incensole acetate, C21H34O3
*(+)-cis- and (+)-trans-olibanic acids
Frankincense resin is edible and is used in traditional medicines in Africa and Asia for digestion and healthy skin. For internal consumption, it is recommended that frankincense be translucent, with no black or brown impurities. It is often light yellow with a (very) slight greenish tint. It is often chewed like gum, but it is stickier.
In Ayurvedic medicine frankincense (Boswellia serrata), commonly referred to in India as “dhoop,” has been used for hundreds of years for treating arthritis, healing wounds, strengthening the female hormone system and purifying the air. The use of frankincense in Ayurveda is called “dhoopan”. In Somali, Ethiopian, Arabian, and Indian cultures, it is suggested that burning frankincense daily in the house brings good health.
Frankincense oil can also be used for relief from stings such as scorpion stings.
Frankincense is used in perfumery and aromatherapy. It is also an ingredient that is sometimes used in skincare. The essential oil is obtained by steam distillation of the dry resin. Some of the smells of the frankincense smoke are products of pyrolysis.
Frankincense is used in many Christian churches including the Eastern Orthodox, Oriental Orthodox and Catholic churches. According to the Biblical text of Matthew 2:11, gold, frankincense, and myrrh were among the gifts to Jesus by the biblical magi “from out of the East.” Christian and Islamic Abrahamic faiths have all used frankincense mixed with oils to anoint newborn infants, initiates and members entering into new phases of their spiritual lives.
Conversely, the spread of Christianity depressed the market for frankincense during the 4th century AD. Desertification made the caravan routes across the Rub’ al Khali or “Empty Quarter” of the Arabian Peninsula more difficult. Additionally, increased raiding by the Parthians in the Near East caused the frankincense trade to dry up after A.D. 300.
The essential oil of frankincense is produced by steam distillation of the tree resin. The oil’s chemical components are 75% monoterpenes, sesquiterpenes, monoterpenoles, sesquiterpenols and ketones. It has a good balsamic sweet fragrance, while the Indian frankincense oil has a very fresh smell. Contrary to what some commercial entities claim, steam or hydro distilled frankincense oils do not contain boswellic acids (triterpenoids), although may be present in trace quantities in the solvent extracted products. The chemistry of the essential oil is mainly monoterpenes and sesquiterpenes, such as alpha-pinene, Limonene, alpha-Thujene, and beta-Pinene with small amounts of diterpenoid components being the upper limit in terms of molecular weight.
Olibanum is characterised by a balsamic-spicy, slightly lemon, fragrance of incense, with a conifer-like undertone. It is used in the perfume, cosmetic and pharmaceutical industries.
In several Indian cooking frankincenseis used to give a special flavour.