Catechu ( or ) is an extract of acacia trees used variously as a

food additive Food additives are substances added to food to preserve flavor or enhance taste, appearance, or other sensory qualities. Some additives, such as vinegar ( pickling), salt ( salting), smoke ( smoking) and sugar ( crystallization), have been used f ...

astringent An astringent (sometimes called adstringent) is a chemical that shrinks or constricts body tissues. The word derives from the Latin '' adstringere'', which means "to bind fast". Astringency, the dry, puckering or numbing mouthfeel caused by t ...

tannin Tannins (or tannoids) are a class of astringent, polyphenolic biomolecules that bind to and Precipitation (chemistry), precipitate proteins and various other organic compounds including amino acids and alkaloids. The term ''tannin'' is widel ...

, and

dye Juan de Guillebon, better known by his stage name DyE, is a French musician. He is known for the music video of the single "Fantasy Fantasy is a genre of speculative fiction that involves supernatural or Magic (supernatural), magical ele ...

. It is extracted from several species of

Acacia ''Acacia'', commonly known as wattles or acacias, is a genus of about of shrubs and trees in the subfamily Mimosoideae of the pea family Fabaceae. Initially, it comprised a group of plant species native to Africa, South America, and Austral ...

, but especially ''

Senegalia catechu ''Senegalia catechu'', previously known as ''Acacia catechu'', is a deciduous, thorny tree which grows up to in height. The plant is called ''kachu'' in Malay; the Malay name was Latinized to "catechu" in Linnaean taxonomy, as the species from ...

'' (previously called ''Acacia catechu''), by boiling the wood in water and evaporating the resulting brew. The Malay name is the basis of the Latinized ''catechu'' chosen as the

Linnaean taxonomy Linnaean taxonomy can mean either of two related concepts: # The particular form of biological classification (taxonomy) set up by Carl Linnaeus, as set forth in his ''Systema Naturae'' (1735) and subsequent works. In the taxonomy of Linnaeus th ...

name of the plant species which provides the extract.

Uses

As an

it has been used since ancient times in Ayurvedic medicine as well as in breath-freshening spice mixtures—for example in France and Italy it is used in some

licorice Liquorice (Commonwealth English) or licorice (American English; see spelling differences; ) is the common name of ''Glycyrrhiza glabra'', a flowering plant of the bean family Fabaceae, from the root of which a sweet, aromatic flavouring is ...

pastilles. It is also an important ingredient in South Asian cooking

paan Betel nut chewing, also called betel quid chewing or areca nut chewing, is a practice in which areca nuts (also called "betel nuts") are chewed together with slaked lime and betel leaves for their stimulant and narcotic effects, the prima ...

mixtures, such as ready-made paan masala and

gutka Gutka, ghutka, or guṭkha () is a type of betel quid and chewing tobacco preparation made of crushed areca nut (also called betel nut), tobacco, catechu, paraffin wax, slaked lime (calcium hydroxide) and sweet or savory flavourings, in India ...

. The catechu mixture is high in natural vegetable

s (which accounts for its astringent effect), and may be used for the tanning of animal hides. Early research by

Humphry Davy Sir Humphry Davy, 1st Baronet (17 December 177829 May 1829) was a British chemist and inventor who invented the Davy lamp and a very early form of arc lamp. He is also remembered for isolating, by using electricity, several Chemical element, e ...

in the early 19th century first demonstrated the use of catechu in tanning over more expensive and traditional oak extracts. Under the name ''cutch'', it is a brown dye used for tanning and dyeing and for preserving

fishing net A fishing net or fish net is a net (device), net used for fishing. Fishing nets work by serving as an improvised fish trap, and some are indeed rigged as traps (e.g. #Fyke nets, fyke nets). They are usually wide open when deployed (e.g. by cast ...

s and

sail A sail is a tensile structure, which is made from fabric or other membrane materials, that uses wind power to propel sailing craft, including sailing ships, sailboats, windsurfers, ice boats, and even sail-powered land vehicles. Sails may b ...

s. Cutch will dye

wool Wool is the textile fiber obtained from sheep and other mammals, especially goats, rabbits, and camelids. The term may also refer to inorganic materials, such as mineral wool and glass wool, that have some properties similar to animal w ...

silk Silk is a natural fiber, natural protein fiber, some forms of which can be weaving, woven into textiles. The protein fiber of silk is composed mainly of fibroin and is most commonly produced by certain insect larvae to form cocoon (silk), c ...

, and

cotton Cotton (), first recorded in ancient India, is a soft, fluffy staple fiber that grows in a boll, or protective case, around the seeds of the cotton plants of the genus '' Gossypium'' in the mallow family Malvaceae. The fiber is almost pure ...

a yellowish-brown. Cutch gives gray-browns with an

iron Iron is a chemical element; it has symbol Fe () and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's o ...

mordant A mordant or dye fixative is a substance used to set (i.e., bind) dyes on fabrics. It does this by forming a coordination complex with the dye, which then attaches to the fabric (or tissue). It may be used for dyeing fabrics or for intensifying ...

and olive-browns with a

copper Copper is a chemical element; it has symbol Cu (from Latin ) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orang ...

mordant. Black catechu has recently also been used by Blavod Drinks Ltd. to dye their

vodka Vodka ( ; is a clear distilled beverage, distilled alcoholic beverage. Its varieties originated in Poland and Russia. Vodka is composed mainly of water and ethanol but sometimes with traces of impurities and flavourings. Traditionally, it is ...

black. White cutch, also known as gambier, gambeer, or gambir, which is extracted from '' Uncaria gambir'' has the same uses. Palm-catechu is extracted from the seeds of ''

Areca catechu ''Areca catechu'' is a species of palm native to the Philippines cultivated for areca nuts. It was carried widely through the tropics by the Austronesian migrations and trade since at least 1500 BCE due to its use in betel nut chewing. ...

''.Buchheister G.A.: ''Handbuch der Drogisten-Praxis.'' Zweite Auflage, Springer, 1891, p. 322, .

Derivative chemicals

The catechu extract gave its name to the

catechin Catechin is a flavan-3-ol, a type of secondary metabolite providing antioxidant roles in plants. It belongs to the subgroup of polyphenols called flavonoids. The name of the catechin chemical family derives from ''catechu'', which is the tannic ...

and

catechol Catechol ( or ), also known as pyrocatechol or 1,2-dihydroxybenzene, is an organic compound with the molecular formula . It is the ''ortho'' isomer of the three isomeric benzenediols. This colorless compound occurs naturally in trace amounts. It ...

chemical families first derived from it. Its historic name is "Japanese Earth" or "Japanese Dirt", which is responsible for naming "

Japanic acid Japanic acid or heneicosanedioic acid is a chemical compound with the chemical formula . The compound is a long-chain dicarboxylic acid, one of the longest naturally occurring dicarboxylic acids. Initially, it was extracted from natural fat calle ...

References

External links

An OCR'd version of the US Dispensatory by Remington and Wood, 1918.
{{dyeing Plant dyes Spices Tannins

Uses

Derivative chemicals

See also

References

External links