Ipratropium impurity A - (1R,3r,5S,8r)-3-hydroxy-8-methyl-8-(1-methylethyl)-8-azoniabicyclo[3.2.1]octane

Colistin sulphate

Oxaliplatin impurity D - (SP-4-2)-[(1S,2S)-cyclohexane-1,2-diamine-kN,kN'][ethane- dioato(2-)-kO1,kO2]platinum (S,S-enantiomer of oxaliplatin)

Dichlorodiaminocyclohexaneplatinum

Oxaliplatin impurity B - (SP-4-2)-diaqua[(1R,2R)-cyclohexane-1,2-diamine-kN,kN']platinum (diaquodiaminocyclohexaneplatinum)

Oxaliplatin impurity C - (OC-6-33)-[(1R,2R)-cyclohexane-1,2-diamine-kN,kN'][ethanedioato(2-)- kO¹,kO²]dihydroxyplatinum

Clazuril for system suitability

Oxaliplatin

Flunarizine dihydrochloride for system suitability

Sodium propionate - Reference Spectrum