| ITEMS | STANDARD |
| Product | Caffeine Anhydrous |
| Characteristics | White or almost white, crystalline powder (BP/EP) or silky, white or almost white, crystals |
| Melting Point | 234.0-239.0°C (BP/EP) |
| Infrared Absorption | Conforms to the caffeine Reference Spectrum (BP/EP) |
| Loss on drying | See Tests (BP/EP) |
| Appearance of solution | Clear,colourless (BP/EP) |
| Heavy metals | =<0.001% (USP) |
| Sulphate | =<500ppm (BP/EP) |
| Each impurity A,B,C,D,E,F | =<0.10% (BP/EP) |
| Unspecified impurities | =<0.10% (BP/EP) |
| Total impurities | =<0.10% (BP/EP) |
| Any individual impurity | =<0.10% (USP) |
| Total impurities | =<0.10% (USP) |
| Loss on drying | =<0.50% (BP/EP) |
| Residue on ignition | =<0.10% (USP) |
| Assay | 98.5-101.0%(USP) |
| Storage condition | Keep in a tightly closed container, |