| 释义 |
tannic acid
tannic acidn.1. A hydrolyzable tannin in the form of a lustrous yellowish to light brown amorphous, powdered, flaked, or spongy substance having the approximate composition C76H52O46, derived from certain plants and used in tanning leather, in fixing dyes to materials, and in clarifying wine and beer.2. See tannin.Thesaurus| Noun | 1. | tannic acid - any of various complex phenolic substances of plant origin; used in tanning and in medicinetannincutch, kutch - tannin extract derived from any of several mangrove barks of Pacific areasphenol - any of a class of weakly acidic organic compounds; molecule contains one or more hydroxyl groupscatechin - a tannic acid that is extracted from black catechu as a white crystalline substance |
Translationstannic acid
tannic acid[′tan·ik ′as·əd] (organic chemistry) C14H10O9 A yellowish powder with an astringent taste; soluble in water and alcohol, insoluble in acetone and ether; derived from nutgalls; decomposes at 210°C; used as an alcohol denaturant and a chemical intermediate, and in tanning and textiles. Also known as digallic acid; gallotannic acid; gallotannin; tannin. C76H52O46 Yellowish-white to light-brown amorphous powder or flakes; decomposes at 210-215°C; very soluble in alcohol and acetone; used as a mordant in dyeing, in photography, as a reagent, and in clarifying wine or beer. Also known as pentadigalloylglucose. tannic acid
tannic acid [tan´ik] a substance obtained from nutgalls, oak bark, and other plant parts, formerly used in medicine as an astringent. It is no longer used alone because it can be absorbed through mucous membranes or damaged skin in amounts sufficient to produce hepatic necrosis, although it is still used as a component of dermatological preparations.tan·nic ac·id (tan'ik as'id), A tannin that occurs in many plants, particularly in the bark of oaks and other members of the Fagaceae; used as a styptic and astringent, and in the treatment of diarrhea; available also as tannic acid glycerite. Sometimes used synonymously with tannin.tan·nic ac·id (tan'ik as'id) A tannin that occurs in many plants; used as a styptic and astringent and to treat diarrhea. tannic acid An antifungal drug, used externally to treat fungus infections of the skin. A brand name of a preparation containing tannic acid and other drugs is Phytex.tannic acid
Related to tannic acid: tanninSynonyms for tannic acidnoun any of various complex phenolic substances of plant originSynonymsRelated Words |