NILE CHEMICALS
NILE
CHEMICALS
TANNIC ACID POWDER PURE
|
TANNIC ACID |
||
| Product | TANNIC ACID | |
| TEST | SPECIFICATION | Results |
| Descriprion | ||
| Colour | Yellowish white impalpable powder | Passes |
| Odour | Characterstic | |
| Taste | Strongly astrigent | |
| Solubility | Soluble in water; Alcohol; solvent ether | Passes |
| Chloroform ;Acetone; Glycerine | ||
| Identification | soln plus soln of gelation | Passes |
| PRECIPITATE | ||
| soln plus soln of Albumin | Passes | |
| PRECIPITATE | ||
| soln plus Ferric Chloride | Passes | |
| Test Soln: Bluish Black Colour | ||
| on addition of Sulphuric Acid Dilute | ||
| Colour disappears & a reddish brown | ||
| PRECIPITATE is produced | ||
| Opical rotation of Soln. | Passes | |
| Dextrororatory | ||
| Reaction | Soln acid to soln of Methyl red | Passes |
| Gum,Dextrin, Sugars | To 2 ml of 20% w/v soln add 2 ml of | Passes |
| & salts | Alcohol (90% v/v) | |
| Soln remains clear | ||
| Shows no Turbidity on addition | ||
| of 1 ml Solvent ether | ||
| Loss on Drying | Losses not more than 12% of it wt, when | 2.64% |
| dried to a constant weight at 105 deg C | ||
| Sulphated Ash | Not more than 0.2 % | 0.19% |