Metoprolol Impurity 1

CAS NO.: 123195-72-2

Formula: C12H18O2

Weight: 194.27

Metoprolol Impurity 2

CAS NO.: 230975-30-1

Formula: C21H28O5

Weight: 360.45

Metoprolol Impurity 3

CAS NO.: 56718-70-8

Formula: C12H16O3

Weight: 208.26

Metoprolol Impurity 4

CAS NO.: 32846-01-8

Formula: C9H12O2

Weight: 152.19

Metoprolol Impurity 5(S)-Metoprolol

CAS NO.: 81024-42-2

Formula: C15H25NO3

Weight: 267.37

Metoprolol Impurity 6(R)-Metoprolol

CAS NO.: 81024-43-3

Formula: C15H25NO3

Weight: 267.37

Metoprolol Impurity 7（N-nitroso-metoprolol）

CAS NO.: 138768-62-4

Formula: C15H24N2O4

Weight: 296.37

Metoprolol Impurity 8

CAS NO.: 50666-68-7

Formula: C6H14ClNO

Weight: 151.63

Metoprolol Impurity 9

CAS NO.: 6452-58-0

Formula: C6H13NO

Weight: 115.18

Metoprolol Impurity 10

CAS NO.: 1416440-64-6

Formula: C15H22O5

Weight: 282.34

Metoprolol Impurity 11

CAS NO.: 106351-44-4

Formula: C12H19NO2

Weight: 209.29

Metoprolol Impurity 12 HCl

CAS NO.: 39552-14-2

Formula: C6H14ClNO. HCl

Weight: 151.63 36.46

Metoprolol Impurity 13

CAS NO.: 84697-14-3

Formula: C13H20O2

Weight: 208.3

Methotrexate EP Impurity B

CAS NO.: 54-62-6

Formula: C19H20N8O5

Weight: 440.42

Methotrexate EP Impurity C

CAS NO.: 2410-93-7

Formula: C20H21N7O6

Weight: 455.431

Methotrexate EP Impurity E

CAS NO.: 19741-14-1

Formula: C15H15N7O2

Weight: 325.33