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Methotrexate Impurity A
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Methotrexate Impurity A

API CATEGORY Methotrexate Impurity
APPEARANCE Brown Solid
CAT NUMBER DCTI-C-1778
CAS NUMBER 945-24-4(Free Base) ; 73978-41-3(HCl Salt)
IUPAC NAME (2,4-diaminopteridin-6-yl)methanol hydrochloride
MOLECULAR FORMULA C7H8N6O (Free base) C7H9ClN6O (Salt)
MOLECULAR WEIGHT 192.18 (Free base) 228.64 (Salt)
SOLUBILITY DMSO
STORAGE CONDITION 2-8°C
SYNONYMS 2,4-Diaminopyrimido[4,5-b]pyrazine-6-methanol Monohydrochloride; 4-Diamino-6-pteridinemethanol Hydrochloride

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Methotrexate Impurity B

  • CAT Number DCTI-C-1412
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Methotrexate γ-Ethyl Ester

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  • MOLECULAR FORMULA C24H27F3N8O7 (with Salt); C22H26N8O5 (Free Acid)
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Methotrexate Impurity C

  • CAT Number DCTI-C-1282
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  • CAT NUMBER DCTI-C-3057
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  • MOLECULAR WEIGHT 308.33

Methotrexate Impurity I

  • CAT Number DCTI-C-1413
  • CAS Number 66147-29-3 (free base)
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Methotrexate Impurity H

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