Pharmaceutical analytical standards

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

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ImpurityLevels of characterisation

Cat. No.: P-S041-123
Formula: C₁₇H₁₈Cl₂N₄O₂
Family: Sildenafil
Synonyms: 5-(3,5-Dichloro-2-ethoxyphenyl)-1-methyl-3-propyl-6H-pyrazolo[4,5-d]pyrimidin-7-one

ImpurityLevels of characterisation

Cat. No.: P-S041-124
Formula: C₁₇H₁₉ClN₄O₂
Family: Sildenafil
Synonyms: 5-(5-Chloro-2-ethoxyphenyl)-1-methyl-3-propyl-4H-pyrazolo[4,5-d]pyrimidin-7-one

ImpurityLevels of characterisation

Cat. No.: P-S041-125
Formula: C₁₇H₂₀N₄O₃
Family: Sildenafil
Synonyms: 5-(2-Ethoxy-3-hydroxyphenyl)-1-methyl-3-propyl-6H-pyrazolo[4,5-d]pyrimidin-7-one

ImpurityLevels of characterisation

Cat. No.: P-S041-126
Formula: C₂₄H₃₄N₆O₅S
Family: Sildenafil
Synonyms: 5-[2,3-Diethoxy-5-(4-methylpiperazin-1-yl)sulfonylphenyl]-1-methyl-3-propyl-6H-pyrazolo[4,5-d]pyrimidin-7-one

ImpurityLevels of characterisation

ImpurityLevels of characterisation

ImpurityLevels of characterisation

ImpurityLevels of characterisation

Cat. No.: P-S041-134
Formula: C₂₃H₃₀N₆O₂S
Family: Sildenafil
Synonyms: [4-Ethoxy-3-(1-methyl-3-propyl-7-sulfanylidene-4H-pyrazolo[4,5-d]pyrimidin-5-yl)phenyl]-(4-methylpiperazin-1-yl)methanone

ImpurityLevels of characterisation

Cat. No.: P-S041-135
Formula: C₁₈H₂₀N₄O₃S
Family: Sildenafil
Synonyms: 4-Ethoxy-3-(1-methyl-3-propyl-7-sulfanylidene-4H-pyrazolo[4,5-d]pyrimidin-5-yl)benzoic acid

ImpurityLevels of characterisation

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