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Cleanchem is a trusted provider of premium pharmaceutical reference materials, specializing in Flucloxacillin and its associated compounds. Our catalog includes pharmacopeial and non-pharmacopeial Flucloxacillin 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 Flucloxacillin-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 Flucloxacillin
CAT No: CL-FCX-NO-01 CAS No: NA Mol Wt: 482.87 Mol F: C19H16ClFN4O6S Inv Status: Custom Synthesis
Chemical Name: (2S,5R,6R)-6-(3-(2-chloro-6-fluorophenyl)-5-methyl-N-nitrosoisoxazole-4-carboxamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
N-Nitroso Flucloxacillin Impurity A
CAT No: CL-FCX-NO-02 CAS No: NA Mol Wt: 500.88 Mol F: C19H18ClFN4O7S Inv Status: Custom Synthesis
Chemical Name: (4S)-2-(carboxy(3-(2-chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxamido)methyl)-5,5-dimethyl-3-nitrosothiazolidine-4-carboxylic acid
N-Nitroso Flucloxacillin Impurity B
CAT No: CL-FCX-NO-03 CAS No: NA Mol Wt: 456.87 Mol F: C18H18ClFN4O5S Inv Status: Custom Synthesis
Chemical Name: (4S)-2-((3-(2-chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxamido)methyl)-5,5-dimethyl-3-nitrosothiazolidine-4-carboxylic acid
N-Nitroso Flucloxacillin Impurity 1
CAT No: CL-FCX-NO-04 CAS No: NA Mol Wt: 954.75 Mol F: C38H35Cl2F2N7O12S2 Inv Status: Custom Synthesis
Chemical Name: (4S)-2-(carboxy(3-(2-chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxamido)methyl)-3-((4S)-2-(carboxy(3-(2-chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxamido)methyl)-5,5-dimethyl-3-nitrosothiazolidine-4-carbonyl)-5,5-dimethylthiazolidine-4-carboxylic acid
N-Nitroso Flucloxacillin Impurity 2
CAT No: CL-FCX-NO-05 CAS No: NA Mol Wt: 514.91 Mol F: C20H20ClFN4O7S Inv Status: Custom Synthesis
Chemical Name: (2S,4R)-2-(1-(3-(2-chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxamido)-2-methoxy-2-oxoethyl)-5,5-dimethyl-3-nitrosothiazolidine-4-carboxylic acid
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