Catechin catechinic acid, catechuic

Catechin (= Catechinic acid Catechuic acid) (flavan-3-ol) Widespread Gossyptum sp. (Malvaceae), Agrimonia eupatoria (Rosaceae), Salix caprea (Salicaceae) Collagenase (1800 pM) [88]... 

Catechin (= Catechinic acid Catechuic acid) (flavan-3-ol)... 

The principal constituents of catechu are catechin and catechu-tannic acid. 

Katechln, n. catechol, catechin. -gerbstoff, m, catechol tan. -saurej /. catechuic acid (catechol). 

Acacia catechu Willd. ErCha (Catechu, Jerusalem thorn) (peeled branch) d-Catechin, catechutanic acid, epicatechin, gambir-fluorescein, gambirine, mitraphylline, tannin, roxburghine I ).33-450 Promote salivation, resolve phlegm, stop bleeding, treat pyogenic infections. 

Catechu and gambier have catechu-tannic acid and catechin for their essential components. They may be adulterated with mineral matter (earth, ochre, clay, sand), starch, dextrin, extraneous tanning materials and dried blood. 

Catechu and gambter usually contain 12-25% of water, 2-5% of mineral matter, 24-48% of catechu-tannic acid and 2-12% of catechin. 

Pyro-catechinol, i-2-Di-hydro3iy Benzene.—The ortho-di-hydroxy benzene is known as pyro-catechinol or pyro-catechin. The first name is preferable as the termination ol indicates its phenol character. Its name also indicates its relation to a resin known as catechu, obtained from an acacia tree. On distillation it yields the phenol, the prefix pyro meaning heat. It is also present in the dry distillation products of wood, coal or bituminous shale. Various plant materials such as resins and the leaves of ampelopsis yield it by alkali fusion. It is also associated with phenol as a sulphuric acid ester in the urine of horses. 

Catechu-tannic Acid.—tannic acid which is found in gum cate- j chin and which yields catechin, protocatechuic acid and p3rrocatechinoh is known as catechu-tannic acid. 

Catechu-tannic Acid.—This body, also known as catechin-red, is obtained by extracting catechu with cold water, or by heating catechin with water to 110°. It precipitates gelatine but not tartar-emetic, and gives a green coloration with ferric acetate. 

Catechu Black, Cutch taction pegu catechu cashoo. Extract prepd from heartwood of Acacia catechu Willd., Leguminosae. Habit. India, Hindustan, Ceylon naturalized in Jamaica. Comiu. 25-35% catechutannic acid, 2-10% catechin catechu red, quercetin, gum. 

X 3.9 nm, 5 xm), mobile phase and flow-rate same as in (a). Peaks 1) gallic acid, 2) proto-catechuic acid, 3) catechin, 4) caffeic acid, 5) sinapic acid, 6) rosmarinic acid. 

Cutch is a tannin and dye obtained from the heartwood of Acacia catechu (L.f) Willd., a leguminous tree native to India, Myanmar and other regions in southern Asia. Its active contents are cat-echutarmic acid (25-35%), catechin (2-10%), quercetin q.vl), and catechu red or brown (Schweppe, 1992 Roberts and Etherington, 2003). While primarily used to produce a fast dye with shades varying between brown, olive and khaki, a pigment based on this extract called Catechu brown (. v.) is described by Salter (1869). 

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