|
|
|
Tannic Acid |
||
| Specification: | ||
| Molecular formula: C76H52O46 CAS: [1401-55-4] Other names: Tannin, Chinese gall tannic acid. Properties: Light yellow to light brown powder, with a peculiar smell and taste very astringent; soluble in a portion of water or alcohol,as well as in acetone; insoluble in chloroform or ether. Specification: Comply with China national standard of GB5308-85 For Technical Content: 81%min. weight loss after dessication 9%max. insoluble materials in water 0.2%max. total color 2max. Usage: For the extraction of germanium,the production of ink,rust preventer of metals,and mud treater in petroleum drilling,and as raw material for pharmaceutical industry. For Dyestuff weight loss after dessication 10%max. state in water: below microetch light absorption: 420min. Content of gallic acid: 7%max. total color 1.0max. Usage: In printing and dyeing of textiles,it is used as color fixer, polygenetic dye and fiber deodorizer. For Medical Specification: Comply with the British Pharmacopoeia Ver 1973, and US. Pharmacopoeia Ver 1995, Content of Tannin: 86%min. Insoluble materials: 0.2%max. Weight loss after dessication: 9.0%max. Clearness of water: up to standard tree gum or dextrin: up to standard burn remains: 0.2%max. content of gallic acid: 7.0max. Usage: For the preparations of antibiotics,treating tinea,clearing toxic material and stoping dysentery, and also for synthesizing sulphanilamide synergist. For Food Weight loss after dessication: 9.0%max. Content of Tannin: 92%min. burn remains: 0.2%max. arsenic: 3ppm(max.) heavy metal: 0.004%max tree gum or dextrin test: up to standard resin test: up to standard |
||
|
|
||