Pharmaceutical Impurity Standards & Reference Standards

Browse our full catalog of pharmaceutical impurities, reference materials, and research chemicals.

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Impurity Standards

Zopiclone Impurity 2

CAT No.-
CAS No.43200-82-4
Mol. F.C11H5ClN4O2
Mol. W.260.64
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Impurity Standards

Zopiclone Impurity 1

CAT No.-
CAS No.1348046-61-6
Mol. F.C17H18N6O3
Mol. W.354.37
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ZOPICLONE

N-Desmethyl Eszopiclone HCl

CAT No.-
CAS No.300701-71-7
Mol. F.C16H15ClN6O3. HCl
Mol. W.374.79 36.46
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Impurity Standards

Zopiclone Impurity (3-Formyl-2-PyrazinecarboxylicAcid)

CAT No.-
CAS No.N/A
Mol. F.C6H4N2O3
Mol. W.152.11
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Impurity Standards

Zopiclone impurity (5-(Chloropyridine-2-yl-carbamoyl)pyrazine)

CAT No.-
CAS No.-
Mol. F.C10H7ClN4O
Mol. W.234.65
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Impurity Standards

Eszopiclone Impurity B

CAT No.-
CAS No.43200-81-3
Mol. F.C11H7ClN4O2
Mol. W.262.66
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Impurity Standards

Zopiclone EP Impurity A (Zopiclone N-Oxide)

CAT No.-
CAS No.43200-96-0
Mol. F.C17H17ClN6O4
Mol. W.404.82
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ZOPICLONE

Eszopiclone (S-Zopiclone)

CAT No.-
CAS No.138729-47-2
Mol. F.C17H17ClN6O3
Mol. W.388.81
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Isotope Labelled Compounds

Eszopiclone-d8

CAT No.-
CAS No.1093385-24-0
Mol. F.C17H9ClN6O3D8
Mol. W.396.86
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Impurity Standards

Zopiclone EP Impurity C

CAT No.-
CAS No.148891-53-6
Mol. F.C11H7ClN4O
Mol. W.246.65
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