Riboflavin for peak identification

Fenoterol for peak identification

Nonoxinol 9

Methenamine

Fexofenadine impurity C - (1RS)-4-[4-(hydroxydiphenylmethyl)piperidin-1-yl]-1-[4-(1-methylethyl)phenyl]butan-1-ol

Fexofenadine impurity B - 2-[3-[(1RS)-1-hydroxy-4-[4-(hydroxydiphenylmethyl)piperidin-1-yl]butyl]phenyl]-2-methylpropanoic acid

Fexofenadine impurity A - 2-[4-[4-[4-(hydroxydiphenylmethyl)piperidin-1-yl] butanoyl]phenyl]-2-methylpropanoic acid

Dorzolamide for system suitability

Essential oil

Tibolone - Reference Spectrum