Methotrexate Impurity I

API Category Methotrexate impurity
Appearance Hygroscopic Yellow Solid
CAT Number DCTI-C-1413
CAS Number 66147-29-3 (free base)
IUPAC Name (S)-4-(4-(((2,4-diaminopteridin-6-yl)methyl)(methyl)amino)benzamido)-5-methoxy-5-oxopentanoic acid formate
Molecular Formula C21H24N8O5 (Free base) 22H26N8O7(Salt)
Molecular Weight 468.47 (Free base) 514.50 (Salt)
Solubility DMSO
Storage Condition 2-8°C
Synonyms Methotrexate EP Impurity I; Methotrexate EP Impurity I Formate salt
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