Pharmaceutical Reference Standards / Impurity Standards

Phenazone
4-Methylphenazone
4-Dimethylaminoantipyrine
Phenazone EP Impurity A

Metabolites

4-Hydroxyantipyrine Sulfate

Isotope Labelled Compounds

Antipyrine-D3 (N-methyl-D3)
4-Dimethylamino Antipyrine-D6