Pharmaceutical Impurity Standards & Reference Standards

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

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Impurity Standards

Levothyroxine Impurity 32

CAT No.-
CAS No.-
Mol. F.C30H22I6N2O8
Mol. W.1299.94
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Impurity Standards

Levothyroxine Impurity 33

CAT No.-
CAS No.-
Mol. F.C30H23I5N2O8
Mol. W.1174.04
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Impurity Standards

Levothyroxine Impurity 34

CAT No.-
CAS No.-
Mol. F.C30H23I5N2O8
Mol. W.1174.04
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Impurity Standards

Levothyroxine Impurity 35

CAT No.-
CAS No.-
Mol. F.C30H22I6N2O8
Mol. W.1299.94
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Impurity Standards

Levothyroxine Impurity 36

CAT No.-
CAS No.-
Mol. F.C30H21I7N2O8
Mol. W.1425.84
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Impurity Standards

Levothyroxine Impurity 37

CAT No.-
CAS No.-
Mol. F.C21H15I4NO5
Mol. W.868.97
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Impurity Standards

Levothyroxine Impurity 39

CAT No.-
CAS No.-
Mol. F.C44H30I10N2O10
Mol. W.2015.77
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Impurity Standards

Levothyroxine Impurity 40

CAT No.-
CAS No.-
Mol. F.C28H16I7NO7
Mol. W.1366.77
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THYROXINE

L-Thyroxine (Tetraiodothyronine)

CAT No.-
CAS No.51-48-9
Mol. F.C15H11I4NO4
Mol. W.776.87
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Isotope Labelled Compounds

L-Thyroxine-13C6

CAT No.-
CAS No.51-48-9 (non-labelled)
Mol. F.C15H11I4NO4
Mol. W.782.81
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