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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, 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, Mirabegron

Mirabegron

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CAS No.

: 223673-61-8

Mol F.

: C21H24N4O2S

Mol W.

: 396.51

Cat No.

: SA53100

Impurities, Mirabegron

Mirabegron Aminothiazolyl Ester Impurity

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CAS No.

: 1684452-85-4

Mol F.

: C21H24N4O2S

Mol W.

: 396.5

Cat No.

: SA53108

Impurities, Mirabegron

Mirabegron EP Impurity A

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CAS No.

: 1796931-48-0

Mol F.

: C21H24N4O2S

Mol W.

: 396.51

Cat No.

: SA53101

Impurities, Mirabegron

Mirabegron EP Impurity B

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CAS No.

: 391901-45-4

Mol F.

: C16H20N2O

Mol W.

: 256.34

Cat No.

: SA53102

Impurities, Mirabegron

Mirabegron EP Impurity C

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CAS No.

: 1581284-82-3

Mol F.

: C21H24N4OS

Mol W.

: 380.51

Cat No.

: SA53103

Impurities, Mirabegron

Mirabegron EP Impurity D

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CAS No.

: 2489747-26-2

Mol F.

: C26H28N6O3S2

Mol W.

: 536.67

Cat No.

: SA53104

Impurities, Mirabegron

Mirabegron EP Impurity E

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CAS No.

: 24954-67-4

Mol F.

: C8H10N2O2

Mol W.

: 166.18

Cat No.

: SA53105

Impurities, Mirabegron

Mirabegron EP Impurity F

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CAS No.

: 223673-34-5

Mol F.

: C16H18N2O3

Mol W.

: 286.33

Cat No.

: SA53106

Impurities, Mirabegron

Mirabegron EP Impurity G

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CAS No.

: 521284-19-5

Mol F.

: C16H16N2O4

Mol W.

: 300.31

Cat No.

: SA53107

Impurities, Mirdametinib

Mirdametinib

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CAS No.

: 391210-10-9

Mol F.

: C16H14F3IN2O4

Mol W.

: 482.2

Cat No.

: SA53700

Impurities, Mirdametinib

Mirdametinib Aniline Impurity

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CAS No.

: 29632-74-4

Mol F.

: C6H5FIN

Mol W.

: 237.01

Cat No.

: SA53708

Impurities, Mirdametinib

Mirdametinib Benzoic Acid Impurity

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CAS No.

: 391211-97-5

Mol F.

: C13H7F3INO2

Mol W.

: 393.1

Cat No.

: SA53703

Impurities, Mirdametinib

Mirdametinib Benzonitrile Impurity

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CAS No.

: 143879-80-5

Mol F.

: C7H2F3N

Mol W.

: 157.09

Cat No.

: SA53710

Impurities, Mirdametinib

Mirdametinib Enantiomer

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CAS No.

: 391210-11-0

Mol F.

: C16H14F3IN2O4

Mol W.

: 482.2

Cat No.

: SA53701

Impurities, Mirdametinib

Mirdametinib Fluoroaniline Impurity

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CAS No.

: 348-54-9

Mol F.

: C6H6FN

Mol W.

: 111.12

Cat No.

: SA53711

Impurities, Mirdametinib

Mirdametinib Isopropylidene Hydroxylamine (R)-Isomer

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CAS No.

: 114778-50-6

Mol F.

: C6H13NO3

Mol W.

: 147.2

Cat No.

: SA53704

Impurities, Mirdametinib

Mirdametinib Isopropylidene Hydroxylamine (S)-Isomer

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CAS No.

: 120564-14-9

Mol F.

: C6H13NO3

Mol W.

: 147.2

Cat No.

: SA53705

Impurities, Mirdametinib, Nitrosamine

Mirdametinib N-Nitroso Acid Impurity

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CAS No.

: NA

Mol F.

: C16H11F3IN3O6

Mol W.

: 525.2

Cat No.

: SA53706

Impurities, Mirdametinib

Mirdametinib Propanoic Acid Impurity

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CAS No.

: 2727370-29-6

Mol F.

: C16H12F3IN2O5

Mol W.

: 496.2

Cat No.

: SA53702

Impurities, Mirdametinib

Mirdametinib Trifluorobenzoic Acid Impurity

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CAS No.

: 61079-72-9

Mol F.

: C7H3F3O2

Mol W.

: 176.09

Cat No.

: SA53707

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

Impurities, Modafinil

Modafinil Related Compound C

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CAS No.

: 68524-30-1

Mol F.

: C15H15NOS

Mol W.

: 257.39999999999998

Cat No.

: SA42604

Impurities, Modafinil

Modafinil Related Compound D

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CAS No.

: 574-42-5

Mol F.

: C26H22O

Mol W.

: 350

Cat No.

: SA42605

Impurities, Modafinil

Modafinil Related Compound E

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CAS No.

: 1726-02-9

Mol F.

: C26H22S2

Mol W.

: 398.6

Cat No.

: SA42606

Impurities, Molnupiravir

Molnupiravir IP Impurity G

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CAS No.

: NA

Mol F.

: C16H26N4O8

Mol W.

: 402.4

Cat No.

: SA46215

Impurities, Molnupiravir

Molnupiravir IP Impurity H

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CAS No.

: 2346619-88-1

Mol F.

: C21H31N3O9

Mol W.

: 469.49

Cat No.

: SA46216

Impurities, Molnupiravir

Molnupiravir α-anomer

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CAS No.

: NA

Mol F.

: C13H19N3O7

Mol W.

: 329.31

Cat No.

: SA46207

Impurities, Mometasone

Mometasone Furoate

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CAS No.

: 83919-23-7

Mol F.

: C27H30Cl2O6

Mol W.

: 521.43

Cat No.

: SA28700

Impurities, Mometasone

Mometasone Furoate EP Impurity B

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CAS No.

: 223776-49-6

Mol F.

: C28H31ClO8S

Mol W.

: 563.06

Cat No.

: SA28702

Impurities, Varenicline

Mono amino deprotected varenicline Impurity

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CAS No.

: 357424-22-7

Mol F.

: C11H14N2

Mol W.

: 174.24

Cat No.

: SA39512

Fingolimod, Impurities

mono O-Acetyl Fingolimod Impurity

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CAS No.

: 1807973-92-7

Mol F.

: C21H36ClNO3

Mol W.

: 385.97

Cat No.

: SA34518

Etravirine, Impurities

Monohydroxy Etravirine

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CAS No.

: 1246815-68-8

Mol F.

: C20H15BrN6O2

Mol W.

: 451.28

Cat No.

: SA26104

Impurities, Tolterodine

Monoisopropyl tolterodine impurity

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CAS No.

: 194482-41-2

Mol F.

: C19H25NO

Mol W.

: 283.41000000000003

Cat No.

: SA28208

Impurities, Montelukast Sodium

Montelukast Mercapto Impurity

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CAS No.

: 162515-68-6

Mol F.

: C6H10O2S

Mol W.

: 146.21

Cat No.

: SA44902

Fosaprepitant, Impurities

MORPHOLINE IMPURITY FOR APREPITANT (Oxalatae salt)

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CAS No.

: 1242175-41-2

Mol F.

: C22H20F7NO6

Mol W.

: 527.4

Cat No.

: SA45426

Impurities, Moxifloxacin

Moxifloxacin

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CAS No.

: 186826-86-8

Mol F.

: C21H24FN3O4

Mol W.

: 401.43

Cat No.

: SA30700

Impurities, Moxifloxacin

Moxifloxacin 7-Amino Impurity

$95.00 25 mg

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CAS No.

: 172426-88-9

Mol F.

: C₁₄H₁₃FN₂O₄

Mol W.

: 292.26

Cat No.

: SA30709

Impurities, Moxifloxacin

Moxifloxacin Difluoro Acid Impurity

$95.00 25 mg

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CAS No.

: 93107-30-3

Mol F.

: C13H9F2NO3

Mol W.

: 265.21

Cat No.

: SA30710

Impurities, Moxifloxacin

Moxifloxacin Difluoro Ethoxy Acid Impurity

$95.00 25 mg

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CAS No.

: 143158-55-8

Mol F.

: C15H13F2NO4

Mol W.

: 309.26

Cat No.

: SA30711

Impurities, Moxifloxacin

Moxifloxacin Difluoro Ethoxy Ethyl Ester

$125.00 25 mg

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CAS No.

: 172602-83-4

Mol F.

: C17H17F2NO4

Mol W.

: 337.32

Cat No.

: SA30712

Impurities, Moxifloxacin

Moxifloxacin Difluoro Hydroxy Ethyl Ester

$155.00 25 mg

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CAS No.

: 452092-31-8

Mol F.

: C15H13F2NO4

Mol W.

: 309.26

Cat No.

: SA30716

Impurities, Moxifloxacin

Moxifloxacin EP Impurity A

$155.00 25 mg

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CAS No.

: 151213-15-9

Mol F.

: C20H21F2N3O3

Mol W.

: 389.4

Cat No.

: SA30701

Impurities, Moxifloxacin

Moxifloxacin EP Impurity B

$255.00 25 mg

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CAS No.

: 1029364-73-5

Mol F.

: C22H27N3O5

Mol W.

: 413.47

Cat No.

: SA30702