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Impurities

SynThink is a trusted producer and supplier of Pharmaceutical Reference Standards, including Impurity Standards. These materials are essential for pharmaceutical companies conducting research into the quality, stability, and biological safety of drug products. We maintain a robust inventory of API impurities, ready to support your development and regulatory needs.

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Impurities, Methylprednisolone Acetate

Methylprednisolone Acetate EP Impurity J

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CAS No.

: 1048031-82-8

Mol F.

: C24H32O6

Mol W.

: 416.51

Cat No.

: SA25010

Impurities, Methylprednisolone Acetate

Methylprednisolone Acetate Impurity D

$195.00 25 mg

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CAS No.

: 150899-33-5

Mol F.

: C22H28O4

Mol W.

: 356.46

Cat No.

: SA25001

Impurities, Methylprednisolone

Methylprednisolone EP Impurity H

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CAS No.

: 18462-27-6

Mol F.

: C22H30O5

Mol W.

: 374.47

Cat No.

: SA14409

Impurities, Methylprednisolone

Methylprednisolone EP Impurity K

$95.00 25 mg

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CAS No.

: 50-24-8

Mol F.

: C21H28O5

Mol W.

: 360.44

Cat No.

: SA14411

Impurities, Metoclopramide

Metoclopramide

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CAS No.

: 364-62-5

Mol F.

: C₁₄H₂₂ClN₃O₂

Mol W.

: 299.8

Cat No.

: SA30600

Impurities, Metoclopramide

Metoclopramide EP Impurity A

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CAS No.

: 5608-13-9

Mol F.

: C16H24ClN3O3

Mol W.

: 341.83

Cat No.

: SA30601

Impurities, Metoclopramide

Metoclopramide EP Impurity B

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CAS No.

: 4093-31-6

Mol F.

: C11H12ClNO4

Mol W.

: 257.67

Cat No.

: SA30602

Impurities, Metoclopramide

Metoclopramide EP Impurity C

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CAS No.

: 7206-70-4

Mol F.

: C8H8ClNO3

Mol W.

: 201.61

Cat No.

: SA30603

Impurities, Metoclopramide

Metoclopramide EP Impurity D

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CAS No.

: 4093-29-2

Mol F.

: C11H13NO4

Mol W.

: 223.23

Cat No.

: SA30604

Impurities, Metoclopramide

Metoclopramide EP Impurity E

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CAS No.

: 100-36-7

Mol F.

: C6H16N2

Mol W.

: 116.2

Cat No.

: SA30605

Impurities, Metoclopramide

Metoclopramide EP Impurity F

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CAS No.

: 38339-95-6; 38059-78-8 (HCl salt)

Mol F.

: C13H20ClN3O2

Mol W.

: 285.77

Cat No.

: SA30606

Impurities, Metoclopramide

Metoclopramide EP Impurity G

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CAS No.

: 171367-22-9

Mol F.

: C14H22ClN3O3

Mol W.

: 315.8

Cat No.

: SA30607

Impurities, Metoclopramide

Metoclopramide EP Impurity H

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CAS No.

: 50-86-2

Mol F.

: C9H9NO4

Mol W.

: 195.17

Cat No.

: SA30608

Impurities, Metoprolol

Metoprolol

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CAS No.

: 51384-51-1

Mol F.

: C15H25NO3

Mol W.

: 267.36

Cat No.

: SA41400

Impurities, Metoprolol

Metoprolol Acid Ethyl Ester

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CAS No.

: 29112-40-1

Mol F.

: C16H25NO4

Mol W.

: 295.37

Cat No.

: SA41413

Impurities, Metoprolol

Metoprolol Acid Methyl Ester

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CAS No.

: 29121-23-1 (base) ; 83281-59-8 (HCL salt)

Mol F.

: C15H23NO4

Mol W.

: 281.35

Cat No.

: SA41419

Impurities, Metoprolol

Metoprolol Bis Propanol

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CAS No.

: 230975-30-1

Mol F.

: C21H28O5

Mol W.

: 360.44

Cat No.

: SA41422

Impurities, Metoprolol

Metoprolol EP Impurity A

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CAS No.

: 109632-08-8

Mol F.

: C14H23NO3

Mol W.

: 253.34

Cat No.

: SA41401

Impurities, Metoprolol

Metoprolol EP Impurity B

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CAS No.

: 56718-71-9

Mol F.

: C‰H‚O‚

Mol W.

: 152.19

Cat No.

: SA41402

Impurities, Metoprolol

Metoprolol EP Impurity C

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CAS No.

: 29122-74-5

Mol F.

: C13H19NO3

Mol W.

: 237.29

Cat No.

: SA41403

Impurities, Metoprolol

Metoprolol EP Impurity D

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CAS No.

: 62572-90-1

Mol F.

: C‚HˆO„

Mol W.

: 226.27

Cat No.

: SA41404

Impurities, Metoprolol

Metoprolol EP Impurity E

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CAS No.

: 163685-38-9

Mol F.

: C15H25NO3

Mol W.

: 267.36

Cat No.

: SA41405

Impurities, Metoprolol

Metoprolol EP Impurity F

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CAS No.

: 7695-63-8

Mol F.

: C‚H‰NO‚

Mol W.

: 209.28

Cat No.

: SA41406

Impurities, Metoprolol

Metoprolol EP Impurity G

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CAS No.

: 501-94-0

Mol F.

: C8H10O2

Mol W.

: 138.16

Cat No.

: SA41407

Impurities, Metoprolol

Metoprolol EP Impurity H

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CAS No.

: 62572-94-5

Mol F.

: C14H23NO3

Mol W.

: 253.34

Cat No.

: SA41408

Impurities, Metoprolol

Metoprolol EP Impurity J

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CAS No.

: 163685-37-8

Mol F.

: C18H31NO5

Mol W.

: 341.44

Cat No.

: SA41409

Impurities, Metoprolol

Metoprolol EP Impurity M

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CAS No.

: 343785-33-1

Mol F.

: C9H22N2O

Mol W.

: 174.28

Cat No.

: SA41410

Impurities, Metoprolol

Metoprolol EP Impurity N

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CAS No.

: 6452-57-9

Mol F.

: C6H15NO2

Mol W.

: 133.19

Cat No.

: SA41411

Impurities, Metoprolol

Metoprolol EP Impurity O

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CAS No.

: 154784-36-8

Mol F.

: C27H41NO6

Mol W.

: 475.62

Cat No.

: SA41412

Impurities, Metoprolol

Metoprolol Epoxy Ester Impurity

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CAS No.

: 76805-25-9

Mol F.

: C13H16O4

Mol W.

: 236.26

Cat No.

: SA41418

Impurities, Metoprolol

Metoprolol Epoxy Hydroxyethyl Impurity

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CAS No.

: 104857-48-9

Mol F.

: C11H14O3

Mol W.

: 194.23

Cat No.

: SA41420

Impurities, Metoprolol

Metoprolol Epoxy Impurity

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CAS No.

: 122-60-1

Mol F.

: C9H10O2

Mol W.

: 150.17

Cat No.

: SA41416

Impurities, Metoprolol

Metoprolol Epoxy Methoxyethyl Impurity

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CAS No.

: 56718-70-8

Mol F.

: C12H16O3

Mol W.

: 208.25

Cat No.

: SA41421

Impurities, Metoprolol

Metoprolol Hydroxy Ester Impurity

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CAS No.

: 17138-28-2

Mol F.

: C10H12O3

Mol W.

: 180.2

Cat No.

: SA41417

Impurities, Metoprolol

Metoprolol R-Isomer

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CAS No.

: 81024-43-3

Mol F.

: C15H25NO3

Mol W.

: 267.36

Cat No.

: SA41414

Impurities, Metoprolol

Metoprolol S-Isomer

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CAS No.

: 81024-42-2

Mol F.

: C15H25NO3

Mol W.

: 267.36

Cat No.

: SA41415

Impurities, Metoprolol

Metoprolol USP RC B

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CAS No.

: 56718-76-4

Mol F.

: C12H17ClO3

Mol W.

: 244.71

Cat No.

: SA41423

Impurities, Midazolam

Midazolam EP Impurity B

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CAS No.

: 59469-74-8

Mol F.

: C18H13ClFN3

Mol W.

: 325.77

Cat No.

: SA44307

Impurities, Midazolam

Midazolam Impurity D

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CAS No.

: 59468-83-6

Mol F.

: C18H11ClFN3O

Mol W.

: 341.8

Cat No.

: SA44304

Impurities, Milnacipran

Milnacipran EP Impurity A

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CAS No.

: 153275-06-0

Mol F.

: C11H11NO

Mol W.

: 173.21

Cat No.

: SA24300

Impurities, Milnacipran

Milnacipran EP Impurity E

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CAS No.

: 140-29-4

Mol F.

: C₈H₇N

Mol W.

: 117.15

Cat No.

: SA24304

Impurities, Milnacipran

Milnacipran EP Impurity F

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CAS No.

: 63106-93-4

Mol F.

: C₁₁H₁₀O₂

Mol W.

: 174.2

Cat No.

: SA24305

Impurities, Milnacipran

Milnacipran EP Impurity M

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CAS No.

: 871100-19-5

Mol F.

: C11H13NO2

Mol W.

: 191.23

Cat No.

: SA24312

Impurities, Minocycline

Minocycline Hydrochloride

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CAS No.

: 13614-98-7

Mol F.

: C23H27N3O7·HCl

Mol W.

: 493.94

Cat No.

: SA49000

Impurities, Modafinil

Modafinil

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CAS No.

: 68693-11-8

Mol F.

: C15H15NO2S

Mol W.

: 273.35000000000002

Cat No.

: SA42600

Impurities, Modafinil

Modafinil Acid Impurity

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CAS No.

: 101094-05-7

Mol F.

: C15H14O4S

Mol W.

: 290.33

Cat No.

: SA42607

Impurities, Modafinil

Modafinil EP Impurity A

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CAS No.

: 63547-24-0

Mol F.

: C15H14O3S

Mol W.

: 274.3

Cat No.

: SA42601

Impurities, Modafinil

Modafinil EP Impurity B

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CAS No.

: 63547-24-0

Mol F.

: C15H15NO3S

Mol W.

: 289.39999999999998

Cat No.

: SA42602

Impurities, Modafinil

Modafinil EP Impurity C

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CAS No.

: 63547-25-1

Mol F.

: C16H16O3S

Mol W.

: 288.36

Cat No.

: SA42603

Impurities, Modafinil

Modafinil Methyl Ester Impurity

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CAS No.

: 713134-72-6

Mol F.

: C16H16O3S

Mol W.

: 288.36

Cat No.

: SA42608