Cloves are the aromatic

flower A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). The biological function of a flower is to facilitate reproduction, usually by providing a mechanism ...

buds of a tree in the family

Myrtaceae Myrtaceae, the myrtle family, is a family of dicotyledonous plants placed within the order Myrtales. Myrtle, pōhutukawa, bay rum tree, clove, guava, acca (feijoa), allspice, and eucalyptus are some notable members of this group. All spe ...

, ''Syzygium aromaticum'' (). They are native to the

Maluku Islands The Maluku Islands (; Indonesian: ''Kepulauan Maluku'') or the Moluccas () are an archipelago in the east of Indonesia. Tectonically they are located on the Halmahera Plate within the Molucca Sea Collision Zone. Geographically they are located ...

(or Moluccas) in

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...

, and are commonly used as a

spice A spice is a seed, fruit, root, bark, or other plant substance primarily used for flavoring or coloring food. Spices are distinguished from herbs, which are the leaves, flowers, or stems of plants used for flavoring or as a garnish. Spices a ...

flavoring A flavoring (or flavouring), also known as flavor (or flavour) or flavorant, is a food additive used to improve the taste or smell of food. It changes the perceptual impression of food as determined primarily by the chemoreceptors of the gusta ...

fragrance An aroma compound, also known as an odorant, aroma, fragrance or flavoring, is a chemical compound that has a smell or odor. For an individual chemical or class of chemical compounds to impart a smell or fragrance, it must be sufficiently vol ...

consumer products A final good or consumer good is a final product ready for sale that is used by the consumer to satisfy current wants or needs, unlike a intermediate good, which is used to produce other goods. A microwave oven or a bicycle is a final good, but ...

, such as

toothpaste Toothpaste is a paste or gel dentifrice used with a toothbrush to clean and maintain the aesthetics and health of teeth. Toothpaste is used to promote oral hygiene: it is an abrasive that aids in removing dental plaque and food from the teeth ...

, soaps, or

cosmetics Cosmetics are constituted mixtures of chemical compounds derived from either natural sources, or synthetically created ones. Cosmetics have various purposes. Those designed for personal care and skin care can be used to cleanse or protec ...

. Cloves are available throughout the year owing to different harvest seasons across various countries.

Etymology

The word ''clove'', first used in English in the

15th century The 15th century was the century which spans the Julian dates from 1 January 1401 ( MCDI) to 31 December 1500 ( MD). In Europe, the 15th century includes parts of the Late Middle Ages, the Early Renaissance, and the early modern period. ...

, derives via

Middle English Middle English (abbreviated to ME) is a form of the English language that was spoken after the Norman conquest of 1066, until the late 15th century. The English language underwent distinct variations and developments following the Old English ...

''clow of gilofer'', Anglo-French ''clowes de gilofre'' and Old French ''clou de girofle'', from the Latin word ''clavus'' "nail". The related English word ''gillyflower'', originally meaning "clove", derives via said Old French ''girofle'' and Latin ''caryophyllon'', from the Greek ''karyophyllon'' "clove", literally "nut leaf".

Botanical features

The clove tree is an

evergreen In botany, an evergreen is a plant which has foliage that remains green and functional through more than one growing season. This also pertains to plants that retain their foliage only in warm climates, and contrasts with deciduous plants, which ...

that grows up to tall, with large leaves and

crimson Crimson is a rich, deep red color, inclining to purple. It originally meant the color of the kermes dye produced from a scale insect, '' Kermes vermilio'', but the name is now sometimes also used as a generic term for slightly bluish-red c ...

flowers grouped in terminal clusters. The flower buds initially have a pale hue, gradually turn green, then transition to a bright red when ready for harvest. Cloves are harvested at long, and consist of a long

calyx Calyx or calyce (plural "calyces"), from the Latin ''calix'' which itself comes from the Ancient Greek ''κάλυξ'' (''kálux'') meaning "husk" or "pod", may refer to: Biology * Calyx (anatomy), collective name for several cup-like structures ...

that terminates in four spreading

sepal A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coined ...

s, and four unopened petals that form a small central ball.

Uses

The flowers of clove tree in Pemba island

Cloves are used in the cuisine of Asian, African,

Mediterranean The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on th ...

, and the Near and

Middle East The Middle East ( ar, الشرق الأوسط, ISO 233: ) is a geopolitical region commonly encompassing Arabia (including the Arabian Peninsula and Bahrain), Asia Minor (Asian part of Turkey except Hatay Province), East Thrace (Europ ...

countries, lending flavor to meats (such as baked ham), curries, and marinades, as well as fruit (such as apples, pears, and

rhubarb Rhubarb is the fleshy, edible stalks ( petioles) of species and hybrids (culinary rhubarb) of '' Rheum'' in the family Polygonaceae, which are cooked and used for food. The whole plant – a herbaceous perennial growing from short, thick r ...

). Cloves may be used to give aromatic and flavor qualities to hot beverages, often combined with other ingredients such as lemon and sugar. They are a common element in spice blends, including pumpkin pie spice and speculaas spices. In

Mexican cuisine Mexican cuisine consists of the cooking cuisines and traditions of the modern country of Mexico. Its earliest roots lie in Mesoamerican cuisine. Its ingredients and methods begin with the first agricultural communities such as the Olmec and M ...

, cloves are best known as ''clavos de olor'', and often accompany

cumin Cumin ( or , or Article title
) (''Cuminum cyminum'') is a

cinnamon Cinnamon is a spice obtained from the inner bark of several tree species from the genus '' Cinnamomum''. Cinnamon is used mainly as an aromatic condiment and flavouring additive in a wide variety of cuisines, sweet and savoury dishes, brea ...

. They are also used in Peruvian cuisine, in a wide variety of dishes such as ''

carapulcra Carapulcra, or carapulca, is an ancient Andean dish that has been prepared for centuries by both Quechua peoples and Aymara peoples. The original term for this dish in the Aymara language is , which means a stew made with hot stones. In contempor ...

'' and '' arroz con leche''. A major component of clove taste is imparted by the chemical

eugenol Eugenol is an allyl chain-substituted guaiacol, a member of the allylbenzene class of chemical compounds. It is a colorless to pale yellow, aromatic oily liquid extracted from certain essential oils especially from clove, nutmeg, cinnamon, ...

, and the quantity of the spice required is typically small. It pairs well with cinnamon,

allspice Allspice, also known as Jamaica pepper, myrtle pepper, pimenta, or pimento, is the dried unripe berry of ''Pimenta dioica'', a midcanopy tree native to the Greater Antilles, southern Mexico, and Central America, now cultivated in many warm par ...

vanilla Vanilla is a spice derived from orchids of the genus ''Vanilla (genus), Vanilla'', primarily obtained from pods of the Mexican species, flat-leaved vanilla (''Vanilla planifolia, V. planifolia''). Pollination is required to make the p ...

red wine Red wine is a type of wine made from dark-colored grape varieties. The color of the wine can range from intense violet, typical of young wines, through to brick red for mature wines and brown for older red wines. The juice from most purple gra ...

basil Basil (, ; ''Ocimum basilicum'' , also called great basil, is a culinary herb of the family Lamiaceae (mints). It is a tender plant, and is used in cuisines worldwide. In Western cuisine, the generic term "basil" refers to the variety also ...

onion An onion (''Allium cepa'' L., from Latin ''cepa'' meaning "onion"), also known as the bulb onion or common onion, is a vegetable that is the most widely cultivated species of the genus ''Allium''. The shallot is a botanical variety of the oni ...

, citrus peel, star anise, and peppercorns.

Non-culinary uses

The spice is used in a type of cigarette called '' kretek'' in Indonesia. Clove cigarettes were smoked throughout Europe, Asia, and the United States. Clove cigarettes are currently classified in the United States as cigars, the result of a

ban Ban, or BAN, may refer to: Law * Ban (law), a decree that prohibits something, sometimes a form of censorship, being denied from entering or using the place/item ** Imperial ban (''Reichsacht''), a form of outlawry in the medieval Holy Roman ...

of flavored cigarettes in September 2009. Clove essential oil may be used to inhibit

mold A mold () or mould () is one of the structures certain fungi can form. The dust-like, colored appearance of molds is due to the formation of spores containing fungal secondary metabolites. The spores are the dispersal units of the fungi. Not ...

growth on various types of foods. In addition to these non-culinary uses of clove, it can be used to protect wood in a system for cultural heritage conservation, and showed the efficacy of clove essential oil to be higher than a boron based wood preservative. Cloves can be used to make a fragrant pomander when combined with an orange. When given as a gift in Victorian England, such a pomander indicated warmth of feeling. Seasonal clove buds drying on Pemba1

Potential medicinal uses and adverse effects

Use of clove for any medicinal purpose has not been approved by the US

Food and Drug Administration The United States Food and Drug Administration (FDA or US FDA) is a federal agency of the Department of Health and Human Services. The FDA is responsible for protecting and promoting public health through the control and supervision of food ...

, and its use may cause

adverse effects An adverse effect is an undesired harmful effect resulting from a medication or other intervention, such as surgery. An adverse effect may be termed a " side effect", when judged to be secondary to a main or therapeutic effect. The term compl ...

if taken orally by people with

liver disease Liver disease, or hepatic disease, is any of many diseases of the liver. If long-lasting it is termed chronic liver disease. Although the diseases differ in detail, liver diseases often have features in common. Signs and symptoms Some of the s ...

blood clotting Coagulation, also known as clotting, is the process by which blood changes from a liquid to a gel, forming a blood clot. It potentially results in hemostasis, the cessation of blood loss from a damaged vessel, followed by repair. The mechanism ...

and

immune system The immune system is a network of biological processes that protects an organism from diseases. It detects and responds to a wide variety of pathogens, from viruses to parasitic worms, as well as Tumor immunology, cancer cells and objects such ...

disorders, or

food allergies A food allergy is an abnormal immune response to food. The symptoms of the allergic reaction may range from mild to severe. They may include itchiness, swelling of the tongue, vomiting, diarrhea, hives, trouble breathing, or low blood pressu ...

. Cloves are used in

traditional medicine Traditional medicine (also known as indigenous medicine or folk medicine) comprises medical aspects of traditional knowledge that developed over generations within the folk beliefs of various societies, including indigenous peoples, before th ...

as the essential oil, which is used as an anodyne (

analgesic An analgesic drug, also called simply an analgesic (American English), analgaesic (British English), pain reliever, or painkiller, is any member of the group of drugs used to achieve relief from pain (that is, analgesia or pain management). It ...

) mainly for dental emergencies and other disorders. There is evidence that clove oil containing

is effective for

toothache Toothache, also known as dental pain,Segen JC. (2002). ''McGraw-Hill Concise Dictionary of Modern Medicine''. The McGraw-Hill Companies. is pain in the teeth or their supporting structures, caused by dental diseases or pain referred to the t ...

pain and other types of pain, and one review reported efficacy of eugenol combined with

zinc oxide Zinc oxide is an inorganic compound with the Chemical formula, formula . It is a white powder that is insoluble in water. ZnO is used as an additive in numerous materials and products including cosmetics, food supplements, rubbers, plastics, ceram ...

as an

for alveolar osteitis. Clove essential oil may prevent the growth of Enterococcus faecalis bacteria which is often present in a root canal treatment failure. Studies to determine its effectiveness for fever reduction, as a

mosquito Mosquitoes (or mosquitos) are members of a group of almost 3,600 species of small flies within the family Culicidae (from the Latin ''culex'' meaning "gnat"). The word "mosquito" (formed by ''mosca'' and diminutive ''-ito'') is Spanish for "lit ...

repellent, and to prevent

premature ejaculation Premature ejaculation (PE) occurs when a man expels semen (and most likely experiences orgasm) soon after beginning sexual activity, and with minimal penile stimulation. It has also been called ''early ejaculation'', ''rapid ejaculation'', '' ...

have been inconclusive. It remains unproven whether

blood sugar Glycaemia, also known as blood sugar level, blood sugar concentration, or blood glucose level is the measure of glucose concentrated in the blood of humans or other animals. Approximately 4 grams of glucose, a simple sugar, is present in the blo ...

levels are reduced by cloves or clove oil. The essential oil may be used in

aromatherapy Aromatherapy is based on the usage of aromatic materials including essential oils and other aroma compounds, with claims for improving psychological and physical well-being. It is offered as a complementary therapy or as a form of alternative ...

Adulteration

''Clove stalks'' are slender stems of the

inflorescence An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed ...

axis that show opposite decussate branching. Externally, they are brownish, rough, and irregularly wrinkled longitudinally with short fracture and dry, woody texture. ''Mother cloves (anthophylli)'' are the ripe fruits of cloves that are ovoid, brown berries, unilocular and one-seeded. ''Blown cloves'' are expanded flowers from which both corollae and

stamens The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filam ...

have been detached. ''Exhausted cloves'' have most or all the oil removed by distillation. They yield no oil and are darker in color.

History

Austronesian maritime trade network in the Indian Ocean

Until the colonial era, cloves only grew on a few islands in the

Moluccas The Maluku Islands (; Indonesian: ''Kepulauan Maluku'') or the Moluccas () are an archipelago in the east of Indonesia. Tectonically they are located on the Halmahera Plate within the Molucca Sea Collision Zone. Geographically they are located ...

(historically called the

Spice Islands A spice is a seed, fruit, root, bark, or other plant substance primarily used for flavoring or coloring food. Spices are distinguished from herbs, which are the leaves, flowers, or stems of plants used for flavoring or as a garnish. Spices a ...

), including Bacan, Makian, Moti,

Ternate Ternate is a city in the Indonesian province of North Maluku and an island in the Maluku Islands. It was the ''de facto'' provincial capital of North Maluku before Sofifi on the nearby coast of Halmahera became the capital in 2010. It is off th ...

, and Tidore. One clove tree named ''Afo'' that experts believe is the oldest in the world on

may be 350–400 years old. Cloves were first traded by the

Austronesian peoples The Austronesian peoples, sometimes referred to as Austronesian-speaking peoples, are a large group of peoples in Taiwan, Maritime Southeast Asia, Micronesia, coastal New Guinea, Island Melanesia, Polynesia, and Madagascar that speak Au ...

in the

Austronesian maritime trade network A trade route is a logistical network identified as a series of pathways and stoppages used for the commercial transport of cargo. The term can also be used to refer to trade over bodies of water. Allowing goods to reach distant markets, a sin ...

(which began at around 1500 BC, later becoming the

Maritime Silk Road The Maritime Silk Road or Maritime Silk Route is the Maritime history, maritime section of the historic Silk Road that connected Southeast Asia, China, the Indian subcontinent, the Arabian peninsula, Somalia, Egypt and Europe. It began by the 2n ...

and part of the Spice Trade). The first notable example of modern clove farming developed on the east coast of

Madagascar Madagascar (; mg, Madagasikara, ), officially the Republic of Madagascar ( mg, Repoblikan'i Madagasikara, links=no, ; french: République de Madagascar), is an island country in the Indian Ocean, approximately off the coast of East Africa ...

, and is cultivated in three separate ways, a

monoculture In agriculture, monoculture is the practice of growing one crop species in a field at a time. Monoculture is widely used in intensive farming and in organic farming: both a 1,000-hectare/acre cornfield and a 10-ha/acre field of organic kale a ...

, agricultural parklands, and agroforestry systems. Archaeologist Giorgio Buccellati found cloves in Terqa, Syria, in a burned-down house which was dated to 1720 BC. This was the first evidence of cloves being used in the west before Roman times. The discovery was first reported in 1978. They reached

Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus ( legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg , map_caption ...

by the first century AD. Another archeological find of a clove is represented by two examples found at a trading port in

Sri Lanka Sri Lanka (, ; si, ශ්‍රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an ...

, dated to around 900–1100 AD. From Chinese records during the

Song Dynasty The Song dynasty (; ; 960–1279) was an imperial dynasty of China that began in 960 and lasted until 1279. The dynasty was founded by Emperor Taizu of Song following his usurpation of the throne of the Later Zhou. The Song conquered the res ...

(960 to 1279 AD), cloves were primarily exported from the Moluccas by ships originating from the Austronesian polities of

Java Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mo ...

Srivijaya Srivijaya ( id, Sriwijaya) was a Buddhist thalassocratic empire based on the island of Sumatra (in modern-day Indonesia), which influenced much of Southeast Asia. Srivijaya was an important centre for the expansion of Buddhism from the ...

Champa Champa ( Cham: ꨌꩌꨛꨩ; km, ចាម្ប៉ា; vi, Chiêm Thành or ) were a collection of independent Cham polities that extended across the coast of what is contemporary central and southern Vietnam from approximately the 2nd ...

, and

Butuan Butuan (pronounced ), officially the City of Butuan ( ceb, Dakbayan sa Butuan; Butuanon: ''Dakbayan hong Butuan''; fil, Lungsod ng Butuan), is a 1st class highly urbanized city in the region of Caraga, Philippines. It is the ''de facto'' ...

. Cloves were also present in records in China,

Southern India South India, also known as Dakshina Bharata or Peninsular India, consists of the peninsular southern part of India. It encompasses the Indian states of Andhra Pradesh, Karnataka, Kerala, Tamil Nadu, and Telangana, as well as the union territ ...

Persia Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkme ...

, and

Oman Oman ( ; ar, عُمَان ' ), officially the Sultanate of Oman ( ar, سلْطنةُ عُمان ), is an Arabian country located in southwestern Asia. It is situated on the southeastern coast of the Arabian Peninsula, and spans the mouth of ...

by around the third century to second century BC. These mentions of "cloves" reported in China, South Asia, and the Middle East come from before the establishment of Southeast Asian maritime trade. But all of these are misidentifications that referred to other plants (like cassia buds,

, or

nutmeg Nutmeg is the seed or ground spice of several species of the genus '' Myristica''. '' Myristica fragrans'' (fragrant nutmeg or true nutmeg) is a dark-leaved evergreen tree cultivated for two spices derived from its fruit: nutmeg, from its seed, ...

); or are imports from

Maritime Southeast Asia Maritime Southeast Asia comprises the countries of Brunei, Indonesia, Malaysia, the Philippines, Singapore, and East Timor. Maritime Southeast Asia is sometimes also referred to as Island Southeast Asia, Insular Southeast Asia or Oceanic Sout ...

mistakenly identified as being natively produced in these regions. During the colonial era, cloves were traded like oil, with an enforced limit on exportation. As the

Dutch East India Company The United East India Company ( nl, Verenigde Oostindische Compagnie, the VOC) was a chartered company established on the 20th March 1602 by the States General of the Netherlands amalgamating existing companies into the first joint-stock c ...

consolidated its control of the spice trade in the 17th century, they sought to gain a

monopoly A monopoly (from Greek el, μόνος, mónos, single, alone, label=none and el, πωλεῖν, pōleîn, to sell, label=none), as described by Irving Fisher, is a market with the "absence of competition", creating a situation where a speci ...

in cloves as they had in

. However, "unlike nutmeg and

mace Mace may refer to: Spices * Mace (spice), a spice derived from the aril of nutmeg * '' Achillea ageratum'', known as English mace, a flowering plant once used as a herb Weapons * Mace (bludgeon), a weapon with a heavy head on a solid shaft used ...

, which were limited to the minute Bandas, clove trees grew all over the Moluccas, and the trade in cloves was beyond the limited policing powers of the corporation." Tourists are told that seedlings from this very tree were stolen by a Frenchman named Pierre Poivre in 1770, transferred to the Isle de France (

Mauritius Mauritius ( ; french: Maurice, link=no ; mfe, label=Mauritian Creole, Moris ), officially the Republic of Mauritius, is an island nation in the Indian Ocean about off the southeast coast of the African continent, east of Madagascar. It incl ...

), and then later to

Zanzibar Zanzibar (; ; ) is an insular semi-autonomous province which united with Tanganyika in 1964 to form the United Republic of Tanzania. It is an archipelago in the Indian Ocean, off the coast of the mainland, and consists of many small islan ...

, which was once the world's largest producer of cloves. Current leaders in clove production are

Tanzania Tanzania (; ), officially the United Republic of Tanzania ( sw, Jamhuri ya Muungano wa Tanzania), is a country in East Africa within the African Great Lakes region. It borders Uganda to the north; Kenya to the northeast; Comoro Islands ...

, and Comoros. Indonesia is the largest clove producer, but only export a small portion of the cloves they produce, which amounts to around 10-15% of the country's clove production. They oftentimes have to import cloves from Madagascar to meet their needs.

Phytochemicals

Eugenol Eugenol is an allyl chain-substituted guaiacol, a member of the allylbenzene class of chemical compounds. It is a colorless to pale yellow, aromatic oily liquid extracted from certain essential oils especially from clove, nutmeg, cinnamon, ...

comprises 72–90% of the essential oil extracted from cloves, and is the compound most responsible for clove aroma. Complete

extract An extract is a substance made by extracting a part of a raw material, often by using a solvent such as ethanol, oil or water. Extracts may be sold as tinctures, absolutes or in powder form. The aromatic principles of many spices, nuts ...

ion occurs at 80 minutes in pressurized water at . Ultrasound-assisted and microwave-assisted extraction methods provide more rapid extraction rates with lower energy costs. Other

phytochemical Phytochemicals are chemical compounds produced by plants, generally to help them resist fungi, bacteria and plant virus infections, and also consumption by insects and other animals. The name comes . Some phytochemicals have been used as poison ...

s of clove oil include acetyl eugenol, beta- caryophyllene, vanillin,

crategolic acid Maslinic acid is a compound derived from dry olive-pomace oil (an olive skin wax) which is a byproduct of olive oil extraction. It is a member of the group of triterpenes known as oleananes. Pharmacology ''In vitro'' study shows that maslinic aci ...

tannin Tannins (or tannoids) are a class of astringent, polyphenolic biomolecules that bind to and precipitate proteins and various other organic compounds including amino acids and alkaloids. The term ''tannin'' (from Anglo-Norman ''tanner ...

s, such as bicornin, gallotannic acid, methyl salicylate, the

flavonoid Flavonoids (or bioflavonoids; from the Latin word ''flavus'', meaning yellow, their color in nature) are a class of polyphenolic secondary metabolites found in plants, and thus commonly consumed in the diets of humans. Chemically, flavonoids ...

s eugenin,

kaempferol Kaempferol (3,4′,5,7-tetrahydroxyflavone) is a natural flavonol, a type of flavonoid, found in a variety of plants and plant-derived foods including kale, beans, tea, spinach, and broccoli. Kaempferol is a yellow crystalline solid with a mel ...

, rhamnetin, and

eugenitin Eugenitin is a chromone derivative, a type of phenolic compound found in cloves. It has also been isolated from the fungal species '' Cylindrocarpon'' sp. C.M.I. 127996. Synthesis Eugenitin has also synthethised using the Kostanecki sodium ace ...

, tri

terpenoid The terpenoids, also known as isoprenoids, are a class of naturally occurring organic chemicals derived from the 5-carbon compound isoprene and its derivatives called terpenes, diterpenes, etc. While sometimes used interchangeably with "terpenes ...

s such as oleanolic acid, stigmasterol, and campesterol and several

sesquiterpene Sesquiterpenes are a class of terpenes that consist of three isoprene units and often have the molecular formula C15H24. Like monoterpenes, sesquiterpenes may be cyclic or contain rings, including many unique combinations. Biochemical modifica ...

s. Although eugenol has not been classified for its potential

toxicity Toxicity is the degree to which a chemical substance or a particular mixture of substances can damage an organism. Toxicity can refer to the effect on a whole organism, such as an animal, bacterium, or plant, as well as the effect on a subs ...

, it was shown to be toxic to test organisms in concentrations of 50, 75, and 100 mg per liter.

Gallery

File:Djarum-blacks-kretek.jpg, Kretek, clove cigarette popular in

. File:Orange pomander.jpg, Cloves used in an orange as a pomander

References

External links

* {{Authority control aromaticum Spices Flora of the Maluku Islands Plants used in Ayurveda Plants used in traditional Chinese medicine Non-timber forest products Indian spices