Pharmaceutical Impurity Standards & Reference Standards

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

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Impurity Standards

Ergocalciferol EP Impurity E (Tachysterol)

CAT No.-
CAS No.-
Mol. F.C28H44O
Mol. W.396.66
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Isotope Labelled Compounds

Ergocalciferol (Vitamin D2)-d6

CAT No.-
CAS No.50-14-6 (non-d)
Mol. F.C28H38OD6
Mol. W.402.70
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VITAMIN

Ergocalciferol Sulfate

CAT No.-
CAS No.N/A
Mol. F.C28H44O4S
Mol. W.476.72
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VITAMIN

Ergocalciferol Glucuronide

CAT No.-
CAS No.N/A
Mol. F.C34H52O7
Mol. W.572.79
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VANCOMYCIN

Epi-(26R) Vancomycin B

CAT No.-
CAS No.-
Mol. F.C66H75Cl2N9O24 HCl
Mol. W.1449.29 36.46
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VALPROIC ACID

Ethyl Valproate

CAT No.-
CAS No.17022-31-0
Mol. F.C10H20O2
Mol. W.172.27
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Isotope Labelled Compounds

Etofylline-d6

CAT No.-
CAS No.519-37-9 (non-labelled)
Mol. F.C9H6D6N4O3
Mol. W.230.26
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THEOPHYLLINE

Etofylline

CAT No.-
CAS No.519-37-9
Mol. F.C9H12N4O3
Mol. W.224.22
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Impurity Standards

Epirubicin Impurity 1(13-Deoxyepirubicin)

CAT No.-
CAS No.952648-77-0
Mol. F.C27H31NO10
Mol. W.529.55
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Impurity Standards

Epirubicin Impurity 2

CAT No.-
CAS No.29742-69-6
Mol. F.C21H17BrO8
Mol. W.477.26
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