Musk
Encyclopedia
Musk is a class of aromatic substances commonly used as base notes
Note (perfumery)
Notes in perfumery are descriptors of scents that can be sensed upon the application of a perfume. Notes are separated into three classes; top/head notes, middle/heart notes, and base notes; which denote groups of smells that can be sensed with respect to the time after the application of a perfume...

 in perfumery. They include glandular secretions from animals such as the musk deer, numerous plants emitting similar fragrances, and artificial substances with similar odors. Musk was a name originally given to a substance with a penetrating odor
Odor
An odor or odour is caused by one or more volatilized chemical compounds, generally at a very low concentration, that humans or other animals perceive by the sense of olfaction. Odors are also commonly called scents, which can refer to both pleasant and unpleasant odors...

 obtained from a gland
Gland
A gland is an organ in an animal's body that synthesizes a substance for release of substances such as hormones or breast milk, often into the bloodstream or into cavities inside the body or its outer surface .- Types :...

 of the male musk deer
Musk deer
Musk deer are artiodactyls of the genus Moschus, the only genus of family Moschidae. They are more primitive than the cervids, or true deer, in not having antlers or facial glands, in having only a single pair of teats, and in possessing a gall bladder, a caudal gland, a pair of tusk-like teeth...

. The substance has been used as a popular perfume
Perfume
Perfume is a mixture of fragrant essential oils and/or aroma compounds, fixatives, and solvents used to give the human body, animals, objects, and living spaces "a pleasant scent"...

 fixative
Fixative (perfumery)
In perfumery, a fixative is a natural or synthetic substance used to reduce the evaporation rate and improve stability when added to more volatile components. This allows the final product to last longer while keeping its original fragrance. Fixatives are indispensable commodities to the perfume...

 since ancient times and is one of the most expensive animal product
Animal product
Animal product, or animal by-product, is a term used to describe material taken from the body of a non-human animal. Examples are fat, flesh, blood, milk, eggs, and lesser known products such as isinglass and rennet....

s in the world. The name, originated from Sanskrit
Sanskrit
Sanskrit , is a historical Indo-Aryan language and the primary liturgical language of Hinduism, Jainism and Buddhism.Buddhism: besides Pali, see Buddhist Hybrid Sanskrit Today, it is listed as one of the 22 scheduled languages of India and is an official language of the state of Uttarakhand...

  meaning "testicle," has come to encompass a wide variety of substances with somewhat similar odors although many of them are quite different in their chemical structure
Chemical structure
A chemical structure includes molecular geometry, electronic structure and crystal structure of molecules. Molecular geometry refers to the spatial arrangement of atoms in a molecule and the chemical bonds that hold the atoms together. Molecular geometry can range from the very simple, such as...

s.

Until the late 19th century, natural musk was used extensively in perfume
Perfume
Perfume is a mixture of fragrant essential oils and/or aroma compounds, fixatives, and solvents used to give the human body, animals, objects, and living spaces "a pleasant scent"...

ry until economic and ethical motives led to the adoption of synthetic musk, which is now used almost exclusively. The organic compound
Organic compound
An organic compound is any member of a large class of gaseous, liquid, or solid chemical compounds whose molecules contain carbon. For historical reasons discussed below, a few types of carbon-containing compounds such as carbides, carbonates, simple oxides of carbon, and cyanides, as well as the...

 primarily responsible for the characteristic odor of musk is muscone
Muscone
Muscone is an organic compound that is the primary contributor to the odor of musk.The chemical structure of muscone was first elucidated by Lavoslav Ružička. It consists of a 15-membered ring ketone with one methyl substituent in the 3-position. It is an oily liquid that is found naturally as...

.

Modern use of natural musk pods occurs in traditional Chinese medicine
Traditional Chinese medicine
Traditional Chinese Medicine refers to a broad range of medicine practices sharing common theoretical concepts which have been developed in China and are based on a tradition of more than 2,000 years, including various forms of herbal medicine, acupuncture, massage , exercise , and dietary therapy...

.

Musk deer

The musk deer belongs to the family Moschidae and lives in India, Pakistan, Tibet, China, Siberia and Mongolia. To obtain the musk, the deer is killed and its gland, also called "musk pod", is removed. Upon drying, the reddish-brown paste inside the musk pod turns into a black granular material
Granular material
A granular material is a conglomeration of discrete solid, macroscopic particles characterized by a loss of energy whenever the particles interact . The constituents that compose granular material must be large enough such that they are not subject to thermal motion fluctuations...

 called "musk grain", which is then tinctured with alcohol. The aroma of the tincture
Tincture
A tincture is an alcoholic extract or solution of a non-volatile substance . To qualify as a tincture, the alcoholic extract is to have an ethanol percentage of at least 40-60%...

 gives a pleasant odor only after it is considerably diluted. No other natural substance has such a complex aroma associated with so many contradictory descriptions; however, it is usually described abstractly as animalic, earthy and woody or something akin to the odor of baby's skin.

Musk has been a key constituent in many perfumes since its discovery, being held to give a perfume long-lasting power as a fixative. Today the trade quantity of the natural musk is controlled by CITES but illegal poaching
Poaching
Poaching is the illegal taking of wild plants or animals contrary to local and international conservation and wildlife management laws. Violations of hunting laws and regulations are normally punishable by law and, collectively, such violations are known as poaching.It may be illegal and in...

 and trading continues.

In Ayurveda
Ayurveda
Ayurveda or ayurvedic medicine is a system of traditional medicine native to India and a form of alternative medicine. In Sanskrit, words , meaning "longevity", and , meaning "knowledge" or "science". The earliest literature on Indian medical practice appeared during the Vedic period in India,...

, Musk has been considered as a life saving drug and used in various cardiac, mental and neurological disorders. It has also been included in various compound formulations like Kasturi Bhairav Ras, Kasturi Modak, Mrignabhyadi Vati and Mrigamadsar etc., which have wide therapeutic applications.

Other animals

Muskrat
Muskrat
The muskrat , the only species in genus Ondatra, is a medium-sized semi-aquatic rodent native to North America, and introduced in parts of Europe, Asia, and South America. The muskrat is found in wetlands and is a very successful animal over a wide range of climates and habitats...

 (Ondatra zibethicus), a rodent native to North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

, has been known since the 17th century to secrete a glandular substance with a musky odor. A chemical means of extracting it was discovered in the 1940s, but it did not prove commercially worthwhile.

Glandular substances with musk-like odor are also obtained from the musk duck
Musk Duck
The Musk Duck is a highly aquatic, stiff-tailed duck native to southern Australia. It is the only living member of the genus Biziura. An extinct relative, the New Zealand Musk Duck or de Lautour's Duck , once occurred on New Zealand, but is only known from prehistoric subfossil bones...

 (Biziura lobata) of southern Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

, the muskox, the musk shrew, the musk beetle
Musk beetle
The musk beetle is a Eurasian species of longhorn beetle belonging to the subfamily Cerambycinae, tribe Callichromatini. Its name comes from the musky smell it emits.-Description:...

 (Aromia moschata), African civet
African Civet
The African Civet is the largest representative of the African Viverridae. It is the sole member of its genus. African Civets can be found from coast to coast across sub-Saharan Africa. They are primarily nocturnal and spend the day sleeping in dense vegetation...

 (Civettictis civetta), the musk turtle
Musk turtle
Musk turtle is the common name given to three genera of aquatic turtles:*Sternotherus, the musk turtles proper,*Staurotypus, variously called Mexican, three-keeled or giant musk turtles, and.*Claudius, the narrow-bridged musk turtle....

, the alligator
Alligator
An alligator is a crocodilian in the genus Alligator of the family Alligatoridae. There are two extant alligator species: the American alligator and the Chinese alligator ....

 of Central America
Central America
Central America is the central geographic region of the Americas. It is the southernmost, isthmian portion of the North American continent, which connects with South America on the southeast. When considered part of the unified continental model, it is considered a subcontinent...

, and from several other animals.

In crocodile
Crocodile
A crocodile is any species belonging to the family Crocodylidae . The term can also be used more loosely to include all extant members of the order Crocodilia: i.e...

s, there are two pairs of musk glands, one pair situated at the corner of the jaw and the other pair in the cloaca
Cloaca
In zoological anatomy, a cloaca is the posterior opening that serves as the only such opening for the intestinal, reproductive, and urinary tracts of certain animal species...

. Musk glands are also found in snakes.

Plants

Some plants such as Angelica archangelica or Abelmoschus moschatus
Abelmoschus moschatus
Abelmoschus moschatus Abelmoschus moschatus Abelmoschus moschatus (Abelmosk, Ambrette seeds, Annual hibiscus, Bamia Moschata, Galu Gasturi, Muskdana, Musk mallow, Musk okra, Musk seeds, Ornamental okra, Rose mallow seeds, Tropical jewel hibiscus, Yorka okra; syn...

produce musky smelling macrocyclic lactone compounds. These compounds are widely used in perfumery as substitutes for animal musk or to alter the smell of a mixture of other musks.

The plant sources include musk flower (Mimulus moschatus
Mimulus moschatus
Mimulus moschatus is a species of monkeyflower known by the common name muskflower.-Distribution:It is native to western North America from British Columbia to California to the Rocky Mountains, where it grows in moist, partially shaded habitat in mountains, woodlands, chaparral, and other areas.It...

), the muskwood (Olearia argophylla
Olearia argophylla
Olearia argophylla is a species of flowering plant in the Asteraceae family. Its common names are musk daisybush, musktree, muskwood and silvershrub. It is found in Australia, specifically in New South Wales, Tasmania and Victoria. It grows as a tall shrub or tree characteristic of wet...

) of the Guianas and West Indies, and the seeds of Abelmoschus moschatus
Abelmoschus moschatus
Abelmoschus moschatus Abelmoschus moschatus Abelmoschus moschatus (Abelmosk, Ambrette seeds, Annual hibiscus, Bamia Moschata, Galu Gasturi, Muskdana, Musk mallow, Musk okra, Musk seeds, Ornamental okra, Rose mallow seeds, Tropical jewel hibiscus, Yorka okra; syn...

(musk seeds).

Artificial compounds

Since obtaining the deer musk requires killing the endangered animal
Endangered species
An endangered species is a population of organisms which is at risk of becoming extinct because it is either few in numbers, or threatened by changing environmental or predation parameters...

, nearly all musk fragrance used in perfumery today is synthetic, sometimes called "white musk". They can be divided into three major classes: aromatic nitro musks, polycyclic musk compounds, and macrocyclic musk compounds. The first two groups have broad uses in industry ranging from cosmetics
Cosmetics
Cosmetics are substances used to enhance the appearance or odor of the human body. Cosmetics include skin-care creams, lotions, powders, perfumes, lipsticks, fingernail and toe nail polish, eye and facial makeup, towelettes, permanent waves, colored contact lenses, hair colors, hair sprays and...

 to detergent
Detergent
A detergent is a surfactant or a mixture of surfactants with "cleaning properties in dilute solutions." In common usage, "detergent" refers to alkylbenzenesulfonates, a family of compounds that are similar to soap but are less affected by hard water...

s. However, the detection of the first two chemical groups in human and environmental samples as well as their carcinogenic properties initiated a public debate on the use of these compounds and a ban or reduction of their use in many regions of the world. Macrocyclic musk compounds are expected to replace them since these compounds appear to be safer.

External links


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