METHOTREXATE

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Impurity Standards

Methotrexate Impurity B

CAT No.-
CAS No.54-62-6
Mol. F.C19H20N8O5
Mol. W.440.42
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Impurity Standards

Methotrexate Impurity C

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CAS No.N/A
Mol. F.C20H21N7O6
Mol. W.455.43
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Impurity Standards

Methotrexate Impurity D

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CAS No.5623-18-7
Mol. F.C15H14N6O3
Mol. W.326.32
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Impurity Standards

Methotrexate Impurity E

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CAS No.19741-14-1
Mol. F.C15H15N7O2
Mol. W.325.33
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Isotope Labelled Compounds

Methotrexate-d3

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CAS No.432545-63-6
Mol. F.C20H19N8O5D3
Mol. W.457.47
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Impurity Standards

Methotrexate EP Impurity H (Methotrexate-5-Monomethyl Ester)

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CAS No.67022-39-3
Mol. F.C21H24N8O5
Mol. W.468.48
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Impurity Standards

Methotrexate EP Impurity I (Methotrexate-1-Monomethyl Ester)

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CAS No.66147-29-3
Mol. F.C21H24N8O5
Mol. W.468.48
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Impurity Standards

Methotrexate EP Impurity L (N-(4-Methylaminobenzoyl)-L-Glutamic Acid)

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CAS No.52980-68-4
Mol. F.C13H16N2O5
Mol. W.280.28
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