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

Ethosuximide
CAT No: CL-ESX-01 CAS No: 77-67-8 Mol Wt: 141.2 Mol F: C7H11NO2 Inv Status: Custom Synthesis
Chemical Name: 3-Ethyl-3-methylpyrrolidine-2,5-dione
Ethosuximide EP Impurity A
CAT No: CL-ESX-02 CAS No: 631-31-2 Mol Wt: 160.2 Mol F: C7H12O4 Inv Status: Custom Synthesis
Chemical Name: (2RS)-2-Ethyl-2-methylbutanedioic acid
Ethosuximide EP Impurity B
CAT No: CL-ESX-03 CAS No: 50598-33-9 Mol Wt: 142.2 Mol F: C7H10O3 Inv Status: Custom Synthesis
Chemical Name: 2-Ethyl-2-methylsuccinic anhydride
Ethosuximide Impurity 1
CAT No: CL-ESX-04 CAS No: 43010-65-7 Mol Wt: 174.2 Mol F: C8H14O4 Inv Status: Custom Synthesis
Chemical Name: 3-(Methoxycarbonyl)-3-methylpentanoic acid
Ethosuximide Impurity 2
CAT No: CL-ESX-05 CAS No: 84590-14-7 Mol Wt: 174.2 Mol F: C8H14O4 Inv Status: Custom Synthesis
Chemical Name: 2-Ethyl-4-methoxy-2-methyl-4-oxobutanoic acid
Ethosuximide D5
CAT No: CL-ESX-06 CAS No: 1989660-59-4 Mol Wt: 146.2 Mol F: C7H6D5NO2 Inv Status: Custom Synthesis
Chemical Name: 3-(Ethyl-d5)-3-methylpyrrolidine-2,5-dione
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