Caffeine

Conforms to BP209, USP32, EP6.1

Minimum Assay: 98.5 - 101.0% EP/USP
Molecular Formula: C8H10N4O2 
Molecular Weight: 194.19 g/mol
Melting Point: 234.0 - 239.0 °C
Acidity: NMT 0.2ml of 0.01M Sodium Hydroxide is required to change the colour of the indicator to blue (BP/EP)
Carbonisable Substance: Pass
Sulphate (SO4): Pass
Heavy Metals (as Pb): >0.001%
Sulphate: <500ppm
Alkalinity: No precipitate formed
Sulphated Ash: <0.1%

Related Substances:

Unspecified Impurities: <0.10%
Total: <0.1%
Disregard Limit: <0.05%

Chromatographic Purity:

Any inidividual impurities: <0.1%
Total Impurities: <0.1%

Loss on Drying: <0.5%
Residue on Ignition: <0.1%

Solubility:

Sparingly in water
Readily in boiling water
Slightly Soluble in Ethanol
Dissolves in concentrated solutions of alkali benzoates or salicylates

Cas Number: 58-08-2

Einecs Number: 200-362-1

HS Code / Commodity Code: 2939300000

Hazard Phrases: H302