Pharmaceutical Reference Standards / Impurity Standards

Caffeine
Caffeine Anhydrous Reference Standard
Caffeine EP Impurity F
Caffeine EP Impurity E
Caffeidine Nitrate Impurity
Caffeine EP Impurity E Hydrochloride
Caffeine EP Impurity C
1,3-Dimethyluric Acid
Caffeine Impurity 8
N-(6-Amino-3-methyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)acetamide
6-Amino-5-(N-formyl-N-methyl)-3-methyluracil
4-Amino-1,3-dimethyl-2,6-dioxy-5-nitrosopyrimidine
Caffeine Citrate
N1-Methylguanosine
N-Nitroso Caffeine Impurity 1

Metabolites

Methylliberine

Isotope Labelled Compounds

Caffeine-D3
Paraxanthine-d6
Paraxanthine-D3
Caffeine-Trimethyl-13C3