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Cleanchem is a trusted provider of premium pharmaceutical reference materials, specializing in Fidaxomicin and its associated compounds. Our catalog includes pharmacopeial and non-pharmacopeial Fidaxomicin 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 Fidaxomicin-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.

Fidaxomicin
CAT No: CL-FDXM-01 CAS No: 873857-62-6 Mol Wt: 1058 Mol F: C52H74Cl2O18 Inv Status: Custom Synthesis
Chemical Name: (2R,3S,4S,5S,6R)-6-(((3Z,5E,8S,9Z,11S,12R,13E,15E,18S)-12-(((2R,3S,4R,5S)-3,4-dihydroxy-5-(isobutyryloxy)-6,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-11-ethyl-8-hydroxy-18-((R)-1-hydroxyethyl)-9,13,15-trimethyl-2-oxooxacyclooctadeca-3,5,9,13,15-pentaen-3-yl)methoxy)-4-hydroxy-5-methoxy-2-methyltetrahydro-2H-pyran-3-yl 3,5-dichloro-2-ethyl-4,6-dihydroxybenzoate
Fidaxomicin Impurity A
CAT No: CL-FDXM-02 CAS No:  112396-61-9 Mol Wt: 1044 Mol F: C51H72Cl2O18 Inv Status: Custom Synthesis
Chemical Name: (2R,3S,4S,5S,6R)-6-(((3E,5E,8S,9E,11S,12R,13E,15E,18S)-12-(((2R,3S,4R,5S)-3,4-dihydroxy-5-(isobutyryloxy)-6,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-11-ethyl-8-hydroxy-18-((R)-1-hydroxyethyl)-9,13,15-trimethyl-2-oxooxacyclooctadeca-3,5,9,13,15-pentaen-3-yl)methoxy)-4-hydroxy-5-methoxy-2-methyltetrahydro-2H-pyran-3-yl 3,5-dichloro-2,4-dihydroxy-6-methylbenzoate
Fidaxomicin Impurity B
CAT No: CL-FDXM-03 CAS No: NA Mol Wt: 1072.1 Mol F: C53H76Cl2O18 Inv Status: Custom Synthesis
Chemical Name: (2R,3S,4S,5S,6R)-6-(((3E,5E,8S,9E,11S,12R,13E,15E,18S)-12-(((2R,3S,4R,5S)-3,4-dihydroxy-5-(isobutyryloxy)-6,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-11-ethyl-8-hydroxy-18-((R)-1-hydroxyethyl)-9,13,15-trimethyl-2-oxooxacyclooctadeca-3,5,9,13,15-pentaen-3-yl)methoxy)-4-hydroxy-5-methoxy-2-methyltetrahydro-2H-pyran-3-yl 3,5-dichloro-2,4-dihydroxy-6-isopropylbenzoate
Fidaxomicin Impurity C
CAT No: CL-FDXM-04 CAS No: NA Mol Wt: 1044 Mol F: C51H72Cl2O18 Inv Status: Custom Synthesis
Chemical Name: (2R,3S,4S,5S,6R)-6-(((3E,5E,8S,9E,11S,12R,13E,15E,17S)-12-(((2R,3S,4R,5S)-3,4-dihydroxy-5-(isobutyryloxy)-6,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-11-ethyl-8-hydroxy-17-((R)-1-hydroxyethyl)-9,13,15-trimethyl-2-oxooxacycloheptadeca-3,5,9,13,15-pentaen-3-yl)methoxy)-4-hydroxy-5-methoxy-2-methyltetrahydro-2H-pyran-3-yl 3,5-dichloro-2-ethyl-4,6-dihydroxybenzoate
Fidaxomicin Impurity 1
CAT No: CL-FDXM-05 CAS No: NA Mol Wt: 1042 Mol F: C52H74Cl2O17 Inv Status: Custom Synthesis
Chemical Name: (2S,3R,4R,5R,6S)-6-(((3E,5E,8R,9E,11R,12S,13E,15E,17R)-11-ethyl-8-hydroxy-12-(((2S,3R,4R,5R)-3-hydroxy-4-(isobutyryloxy)-5,6,6-trimethyltetrahydro-2H-pyran-2-yl)oxy)-17-((R)-1-hydroxyethyl)-9,13,15-trimethyl-2-oxooxacycloheptadeca-3,5,9,13,15-pentaen-3-yl)methoxy)-4-hydroxy-5-methoxy-2-methyltetrahydro-2H-pyran-3-yl 3,5-dichloro-2-ethyl-4,6-dihydroxybenzoate
Fidaxomicin Impurity 2
CAT No: CL-FDXM-06 CAS No: NA Mol Wt: 813.8 Mol F: C40H54Cl2O13 Inv Status: Custom Synthesis
Chemical Name: (2S,3R,4R,5R,6S)-6-(((3E,5E,8R,9E,11R,12S,13E,15E,17R)-11-ethyl-8,12-dihydroxy-17-((R)-1-hydroxyethyl)-9,13,15-trimethyl-2-oxooxacycloheptadeca-3,5,9,13,15-pentaen-3-yl)methoxy)-4-hydroxy-5-methoxy-2-methyltetrahydro-2H-pyran-3-yl 3,5-dichloro-2-ethyl-4,6-dihydroxybenzoate
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