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Cleanchem is a trusted provider of premium pharmaceutical reference materials, specializing in Finasteride and its associated compounds. Our catalog includes pharmacopeial and non-pharmacopeial Finasteride impurities, metabolites, nitrosamine derivatives (N-NO compounds), and stable isotope-labeled products. These reference standards play a critical role in pharmaceutical R&D, supporting activities such as product formulation, ANDA and DMF submissions, quality assurance, analytical method development, and stability assessments.
All Finasteride-related substances undergo comprehensive characterization and are delivered with complete Certificates of Analysis and supporting analytical documentation to ensure regulatory adherence. Upon request, we can offer EP/USP traceable standards. Our products are routinely re-evaluated to maintain consistent quality and performance.

N-Nitroso Finasteride
CAT No: CL-FSR-NO-01 CAS No: NA Mol Wt: 401.55 Mol F: C23H35N3O3 Inv Status: Custom Synthesis
Chemical Name: (4aR,4bS,6aS,7S,9aS,9bS,11aR)-N-(Tert-butyl)-4a,6a-dimethyl-N-nitroso-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide
N-Nitroso Finasteride Impurity 1
CAT No: CL-FSR-NO-02 CAS No: NA Mol Wt: 403.57 Mol F: C23H37N3O3 Inv Status: Custom Synthesis
Chemical Name: (4aR,4bS,6aS,7S,9aS,9bS,11aR)-N-(Tert-butyl)-4a,6a-dimethyl-N-nitroso-2-oxohexadecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide
N-Nitroso Finasteride Impurity 2
CAT No: CL-FSR-NO-03 CAS No: NA Mol Wt: 399.54 Mol F: C23H33N3O3 Inv Status: Custom Synthesis
Chemical Name: (4aR,4bS,6aS,7S,9aS,9bS)-N-(Tert-butyl)-4a,6a-dimethyl-N-nitroso-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10-dodecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide
N-Nitroso Finasteride Impurity 3
CAT No: CL-FSR-NO-04 CAS No: NA Mol Wt: 386.52 Mol F: C22H32N3O3 Inv Status: Custom Synthesis
Chemical Name: (4aR,4bS,6aS,7S,9aS,9bS,11aR)-N-(tert-butyl)-4a,6a-dimethyl-1-nitroso-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide
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