Caffeine anhydrous
Description:  A white crystalline powder or silky, white crystals, sublimes readily.
Solubility:  Sparingly soluble in water, freely soluble in boiling water, slightly soluble in ethanol. It
dissolves in concentrated solutions of alkali benzoates or salicylates.
Acidity:  Not more than 0.2ml of 0.01M NaOH is required
Related Substances:  Thin-Layer Chromatography
Sulphates:  Not more than 500 ppm
Heavy Metals:  Not more than 10 ppm Pb
Loss on drying:  Not more than 0.5%
Sulphated Ash:  Not more than 0.1%
Assay (on dried basis):  Not less than 98.5%
      Caffeine is a methylxanthine (like theophylline or theobromine), a natural substance derived from the purine found in various plant families worldwide. Well-known examples of plants in which Caffeine is found include coffea arabica (coffee), thea sinensis (black tea), ilex paraguayensis (mate) and cola vera (cola nuts)