Tannic Acid
Electron Microscopy Sciences Tannic Acid 5% Aqueous Solution 500 ML
For your convenience in a concentration of 5.0% aqueous.
ALADDIN SCIENTIFIC CORPORATION Tannic acid, 100g
Slight special smell strong astringency dark color in exposed light and air Soluble in water soluble in ethanol acetone and glycerol almost insoluble in ether benzene chloroform and petroleum ether Slight special smell with strong astringency Light yellow amorphous powder or loose glossy scaly or spongy solid most of them decompose into pyrogallic acid and carbon dioxide at 210-215 degC 1G in 0 35ml water and 1ml hot glycerin Odorless flammable When it comes to albumin starch gelatin and many alkaloids and metal salts it will precipitate When it comes to iron salts it will also produce black or precipitate The spontaneous combustion point was 526 6 degC and the median lethal dose (rabbit oral) was 5 0 g / kg Tannin is not a single compound and its chemical composition is complex Condensed tannin is a kind of flavanol The 2-position of flavanol in the molecule combines with catechol or pyrogallol through carbon carbon bond Hydrolyzable tannin with ester bond in molecule is ga