Pharmaceutical analytical standards

Active ingredients, pharmacopoeial impurities, metabolites, nitrosamines and labelled standards.

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ImpurityLevels of characterisation

ImpurityLevels of characterisation

ImpurityLevels of characterisation

ImpurityLevels of characterisation

Cat. No.: P-S041-145
Formula: C₂₁H₂₇N₇O₅S
Family: Sildenafil
Synonyms: 5-[2-Ethoxy-5-(4-methylpiperazin-1-yl)sulfonylphenyl]-1-nitroso-3-propyl-6H-pyrazolo[4,5-d]pyrimidin-7-one

ImpurityLevels of characterisation

Cat. No.: P-S041-151
Formula: C₂₂H₂₉N₅O₄S
Family: Sildenafil
Synonyms: 2-[5-(4-Ethylpiperazin-1-yl)sulfonyl-2-hydroxyphenyl]-5-methyl-7-propyl-3H-pyrrolo[2,3-d]pyrimidin-4-one

ImpurityLevels of characterisation

Cat. No.: P-S041-155
Formula: C₂₁H₃₀N₆O₅S
Family: Sildenafil
Synonyms: 4-[(2-Ethoxy-3-piperazin-1-ylsulfonylbenzoyl)amino]-1-methyl-3-propylpyrazole-5-carboxamide

ImpurityLevels of characterisation

Cat. No.: P-S041-156
Formula: C₂₄H₃₃N₅O₆S
Family: Sildenafil
Synonyms: 2-[2-Ethoxy-5-(4-ethylpiperazin-1-yl)sulfonylphenyl]-5-hydroxy-5-methyl-7-propyl-3H-pyrrolo[2,3-d]pyrimidine-4,6-dione

ImpurityLevels of characterisation

ImpurityLevels of characterisation

ImpurityLevels of characterisation

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