植物生化提取物
CAS号:1401-55-4
品名:单宁酸Tannicacid
中文别名:鞣酸;没食子鞣酸;二倍酸;丹宁酸;炭尼酸;
英文别名:1,2,3,4,6-penta-O-{3,4-dihydroxy-5-[(3,4,5-trihydroxybenzoyl)oxy]benzoyl}-D-glucopyranose;2,3-dihydroxy-5-({[(2R,3R,4S,5R,6R)-3,4,5,6-tetrakis({3,4-dihydroxy-5-[(3,4,5-trihydroxyphenyl)carbonyloxy]phenyl}carbonyloxy)oxan-2-yl]methoxy}carbonyl)phenyl3,4,5-trihydroxybenzoate;Gallotannicacid;Digallicacid;Acidumtannicum;Gallotannin;Tannimum;Quercitannin;Oakbarktannin;Quercotannicacid;Querci-tannicacid;Querco-tannicacid;Tannicacid;GallotanninTannin;Glycerite;
分子式:C76H52O46
分子量:1701.2
精确质量:1700.17
Psa:777.98
RTECS号:WW5075000
BRN号:8186396
EINECS号:215-753-2
MDL号:MFCD00066397
外观与性状:淡黄色至黄褐色的固体带有一种微弱气味
密度:2.12 g/cm3
熔点:218°C (分解)
闪点:198°C
折射率:1.927
稳定性:Stable. Incompatible with metallic salts, strong oxidizing agents, iron and other heavy metals.
储存条件:库房低温通风干燥
安全说明:S24/25; S36; S26; S36/37/39; S22
危险类别码:R40
WGK Germany:2
海关编码:3201909000
危险品标志:Xi
危险性防范说明:P273
危险性描述:H412
简介:Tannicacidisaspecificcommercialformoftannin,atypeofpolyphenol.Itsweakacidity(pKaaround10)isduetothenumerousphenolgroupsinthestructure.ThechemicalformulaforcommercialtannicacidisoftengivenasC76H52O46,whichcorrespondswithdecagalloylglucose,butinfactitisamixtureofpolygalloylglucosesorpolygalloylquinicacidesterswiththenumberofgalloylmoietiespermoleculerangingfrom2upto12dependingontheplantsourceusedtoextractthetannicacid.Commercialtannicacidisusuallyextractedfromanyofthefollowingplantpart:Tarapods(Caesalpiniaspinosa),gallnutsfromRhussemialataorQuercusinfectoriaorSicilianSumacleaves(Rhuscoriaria).
用途:澄清剂、增涩剂、粗油脱臭剂、助香剂;单宁酸可用于鞣革、墨水制造、纸张和丝绸上胶、锅炉除垢等,还可作媒染剂、啤酒和葡萄酒的澄明剂、橡胶的凝结剂等。可用于用于印染、冶金、医药等工业,单宁酸本身毒性很低。铍、铝、镓、铟、铌、钽和锆的沉淀和重量测定。铜、铁、钒、铈和钴的比定测定。蛋白质及生物碱的沉淀剂。钼酸铵滴定铅时的外指示剂。染料媒染剂。