| 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,? |