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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 H

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In Stock

CAS No.

: 1575528-93-6

Mol F.

: C24H29N3O3

Mol W.

: 407.5

Cat No.

: SA24307

Impurities, Milnacipran

Milnacipran EP Impurity I

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In Stock

CAS No.

: 1575528-97-0

Mol F.

: C23H26N2O4

Mol W.

: 394.46

Cat No.

: SA24308

Impurities, Milnacipran

Milnacipran EP Impurity J

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In Stock

CAS No.

: 1100753-09-0

Mol F.

: C23H24N2O3

Mol W.

: 376.45

Cat No.

: SA24309

Impurities, Milnacipran

Milnacipran EP Impurity K

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In Stock

CAS No.

: 1575529-05-3

Mol F.

: C38H46N4O4

Mol W.

: 622.79

Cat No.

: SA24310

Impurities, Milnacipran

Milnacipran EP Impurity L

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In Stock

CAS No.

: 153275-06-0

Mol F.

: C₁₁H₁₁NO

Mol W.

: 173.21

Cat No.

: SA24311

Impurities, Molnupiravir

Molnupiravir Acetyl Impurity

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In Stock

CAS No.

Mol F.

: C11H15N3O7

Mol W.

: 301.3

Cat No.

: SA46211

Impurities, Molnupiravir

Molnupiravir Enantiomer

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In Stock

CAS No.

: NA

Mol F.

: C13H19N3O7

Mol W.

: 329.31

Cat No.

: SA46208

Impurities, Molnupiravir

Molnupiravir Impurity A

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In Stock

CAS No.

: 2346620-55-9

Mol F.

: C16H23N3O7

Mol W.

: 369.37

Cat No.

: SA46202

Impurities, Molnupiravir

Molnupiravir Impurity F

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In Stock

CAS No.

: 1686124-74-2

Mol F.

: C16H23N3O6

Mol W.

: 353.37

Cat No.

: SA46213

Impurities, Molnupiravir

Molnupiravir IP Impurity I

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In Stock

CAS No.

: NA

Mol F.

: C13H19N3O7

Mol W.

: 329.31

Cat No.

: SA46217

Impurities, Molnupiravir

Molnupiravir IP Impurity J

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C12H17N3O7

Mol W.

: 315.28

Cat No.

: SA46218

Impurities, Molnupiravir

Molnupiravir RC 9 (Uridines 5’- (2-methylpropanoate)

Please enquire for price & pack size

In Stock

CAS No.

: 886538-48-3

Mol F.

: C13H18N2O7

Mol W.

: 314.29

Cat No.

: SA46214

Impurities, Mometasone

Mometasone EP Impurity J

$695.00 25 mg

In Stock

CAS No.

: 1370190-55-8

Mol F.

: C28H32Cl2O6

Mol W.

: 535.45

Cat No.

: SA28714

Impurities, Mometasone

Mometasone EP Impurity N

$295.00 25 mg

In Stock

CAS No.

: 352315-75-4

Mol F.

: C‚ƒHƒClO‡S

Mol W.

: 487.01

Cat No.

: SA28722

Impurities, Mometasone

Mometasone EP Impurity O

$225.00 25 mg

In Stock

CAS No.

: 24916-91-4

Mol F.

: C24H31ClO6

Mol W.

: 450.95

Cat No.

: SA28717

Impurities, Mometasone

Mometasone EP Impurity Q; 17α-Hydroxy-21-chloro-9β,11β-epoxy-16α-methylpregna-1,4-diene-3,20-dione

$255.00 25 mg

In Stock

CAS No.

: 83881-08-7

Mol F.

: C22H27ClO4

Mol W.

: 390.90

Cat No.

: SA28719

Impurities, Mometasone

Mometasone EP Impurity T

$250.00 25 mg

In Stock

CAS No.

Mol F.

: C27H29Cl3O6

Mol W.

: 555.87

Cat No.

: SA28718

Impurities, Mometasone

Mometasone Furoate EP Impurity A

$355.00 25 mg

In Stock

CAS No.

: 83880-65-3

Mol F.

: C27H29ClO5

Mol W.

: 468.97

Cat No.

: SA28701

Impurities, Mometasone

Mometasone Furoate EP Impurity C

$345.00 25 mg

In Stock

CAS No.

: 1305334-31-9

Mol F.

: C27H29CIO6

Mol W.

: 484.97

Cat No.

: SA28703

Impurities, Mometasone

Mometasone Furoate EP Impurity D

$295.00 25 mg

In Stock

CAS No.

: 83881-09-8

Mol F.

: C₂₇H₂₉ClO₆

Mol W.

: 484.97

Cat No.

: SA28704

Impurities, Mometasone

Mometasone Furoate EP Impurity F

$195.00 25 mg

In Stock

CAS No.

: 1305334-30-8

Mol F.

: C₂₇H₂₈Cl₂O₇

Mol W.

: 535.41

Cat No.

: SA28706

Impurities, Mometasone

Mometasone Furoate EP Impurity G

$195.00 25 mg

In Stock

CAS No.

: 105102-22-5

Mol F.

: C22H28Cl2o4

Mol W.

: 427.36

Cat No.

: SA28707

Impurities, Mometasone

Mometasone Furoate EP Impurity H

$255.00 25 mg

In Stock

CAS No.

: 148596-90-1

Mol F.

: C27H31ClO7

Mol W.

: 502.98

Cat No.

: SA28708

Impurities, Mometasone

Mometasone Furoate EP Impurity K; Icometasone

$255.00 25 mg

In Stock

CAS No.

: 4647-20-5

Mol F.

: C22H29ClO5

Mol W.

: 408.91

Cat No.

: SA28721

Impurities, Mometasone

Mometasone Furoate EP Impurity P

$155.00 25 mg

In Stock

CAS No.

Mol F.

: C27H31ClO7

Mol W.

: 502.98

Cat No.

: SA28720

Impurities, Mometasone

Mometasone Furoate EP Impurity R

$395.00 25 mg

In Stock

CAS No.

: 1370190-08-1

Mol F.

: C28H33ClO9S

Mol W.

: 581.07

Cat No.

: SA28723

Impurities, Mometasone

Mometasone Furoate EP Impurity S

$395.00 25 mg

In Stock

CAS No.

: 2231764-75-1

Mol F.

: C27H30Cl2O6

Mol W.

: 521.4

Cat No.

: SA28724

Impurities, Penciclovir

Monoacetate Penciclovir; Penciclovir Impurity B

$355.00 25 mg

In Stock

CAS No.

: 97845-80-2

Mol F.

: C12H17N5O4

Mol W.

: 295.29

Cat No.

: SA27703

Eslicarbazepine, Impurities

Monohydroxy Carbamazepine

Please enquire for price & pack size

In Stock

CAS No.

: 104746-04-5

Mol F.

: C15H14N2O2

Mol W.

: 254.28

Cat No.

: SA28800

Fosaprepitant, Impurities

Morpholin Impurity

$100.00 25 mg

In Stock

CAS No.

: 1242175-41-2

Mol F.

: C22H20F7NO6

Mol W.

: 527.4

Cat No.

: SA45402

Impurities, Moxifloxacin

Moxifloxacin Difluoro Hydroxy acid Impurity

$95.00 25 mg

In Stock

CAS No.

: 154093-72-8

Mol F.

: C13H9F2NO4

Mol W.

: 281.21

Cat No.

: SA30715

Impurities, Moxifloxacin

Moxifloxacin Difluoro Methoxy Ethyl Ester

$95.00 25 mg

In Stock

CAS No.

: 112811-71-9

Mol F.

: C16H15F2NO4

Mol W.

: 323.29

Cat No.

: SA30714

Impurities, Moxifloxacin

Moxifloxacin Difluoro Methoxy Impurity

$95.00 25 mg

In Stock

CAS No.

: 112811-72-0

Mol F.

: C14H11F2NO4

Mol W.

: 295.24

Cat No.

: SA30713

Impurities, Moxifloxacin

Moxifloxacin Difluoro Methoxy Methyl Ester

$155.00 25 mg

In Stock

CAS No.

: 141290-02-0

Mol F.

: C15H13F2NO4

Mol W.

: 309.26

Cat No.

: SA30717

Impurities, Moxifloxacin

Moxifloxacin EP Impurity F

$255.00 25 mg

In Stock

CAS No.

: 721970-37-2; 1179992-99-4; 1350716-67-4 (salt)

Mol F.

: C22H26FN3O4

Mol W.

: 415.46

Cat No.

: SA30706

Impurities, Moxifloxacin

Moxifloxacin EP Impurity G

$225.00 25 mg

In Stock

CAS No.

: 1394029-14-1; 268545-13-7 (HCl Salt)

Mol F.

: C21H24FN3O4

Mol W.

: 401.43

Cat No.

: SA30707

Impurities, Moxifloxacin

Moxifloxacin ethyl ester

$95.00 50 mg

In Stock

CAS No.

: 1403836-23-6

Mol F.

: C23H28FN3O4

Mol W.

: 429.48

Cat No.

: SA30718

Impurities, Moxifloxacin

Moxifloxacin Methyl Ester

$155.00 25 mg

In Stock

CAS No.

: 721970-35-0

Mol F.

: C₂₂H₂₆FN₃O₄

Mol W.

: 415.46

Cat No.

: SA30708

Ibrutinib, Impurities, Nitrosamine

N- Nitroso Ibrutinib

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C22H21N7O2

Mol W.

: 415.45

Cat No.

: SA47422

Impurities, Linagliptin

N-(2-Acetylphenyl)-2-[8-((R)-3-aminopiperidin-1-yl)-7-but-2-ynyl-3-methyl-2,6-dioxo-2,3,6,7-tetrahydro-purin-1-yl] acetamide

Please enquire for price & pack size

In Stock

CAS No.

: 2416949-69-2

Mol F.

: C25H29N7O4

Mol W.

: 491.55

Cat No.

: SA49905

Impurities, Linagliptin

N-(2-Acetylphenyl)-2-chloroacetamide

Please enquire for price & pack size

In Stock

CAS No.

: 6140-11-0

Mol F.

: 211.64

Mol W.

: C10H10ClNO2

Cat No.

: SA49951

Abacavir, Impurities

N-(2-Amino-4,6-dichloro-5-pyrimidinyl)formamide

$79.00 25 mg

In Stock

CAS No.

: 171887-03-9

Mol F.

: C5H4Cl2N4O

Mol W.

: 207.02

Cat No.

: SA18119

Abacavir, Impurities

N-(4-(hydroxymethyl)cyclopent-2-enyl)acetamide

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C8H13NO2

Mol W.

: 155.19

Cat No.

: SA18121

Impurities, Nintedanib

N-(4-aminophenyl)-2-chloro-N-methylacetamide

$85.00 25 mg

In Stock

CAS No.

: 855860-75-2

Mol F.

: C₉H₁₁N₂OCl

Mol W.

: 198.64

Cat No.

: SA22513

Impurities, Nintedanib

N-(4-Aminophenyl)-N-methyl-2-(4-methylpiperazin-1-yl)acetamide

$85.00 25 mg

In Stock

CAS No.

: 262368-30-9

Mol F.

: C14H22N4O

Mol W.

: 262.35

Cat No.

: SA22507

Impurities, Irbesartan

N-[(2’-Cyano[1,1’-biphenyl]-4-yl)methyl]-1-[(1-oxopentyl)amino]cyclopentanecarboxamide

Please enquire for price & pack size

In Stock

CAS No.

: 141745-71-3

Mol F.

: C25H29N3O2

Mol W.

: 403.52

Cat No.

: SA23317

Impurities, Lorcaserin

N-Acetyl Lorcaserin

Please enquire for price & pack size

In Stock

CAS No.

: 1181690-72-1

Mol F.

: C13H16ClNO

Mol W.

: 237.72

Cat No.

: SA18807

Impurities, Sitagliptin

N-Acetyl Sitagliptin

$175.00 25 mg

In Stock

CAS No.

: 1379666-94-0

Mol F.

: C18H17F6N5O2

Mol W.

: 449.35

Cat No.

: SA10408

Impurities, Ticagrelor

N-Alkylated Ticagrelor Impurity

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C12H21NO5

Mol W.

: 259.3

Cat No.

: SA32524

Fosaprepitant, Impurities

N-Benzyl CAH Impurity

$350.00 25 mg

In Stock

CAS No.

Mol F.

: C27H24F7NO2

Mol W.

: 527.47

Cat No.

: SA45419