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Impurities

SynThink is a producer and supplier of a number of pharmaceutical Reference Standards (Impurity Standards) which are required for pharmaceutical companies to study quality, stability and biological safety of pharmaceutical products. Many API Impurities are available in our stock.

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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

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

Fosaprepitant, Impurities

N-Benzyl morpholinone impurity

$350.00 25 mg

In Stock

CAS No.

Mol F.

: C21H19F6NO3

Mol W.

: 447.37

Cat No.

: SA45420

Impurities, Nebivolol

N-Benzyl Nebivolol (Mixture of diasteromers)

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C29H31F2NO4

Mol W.

: 495.56

Cat No.

: SA14707

Aminocaproic Acid, Impurities

N-Benzyloxycarbonyl-6-aminocaproic Acid

Please enquire for price & pack size

In Stock

CAS No.

: 1947-00-8

Mol F.

: C₁₄H₁₉NO₄

Mol W.

: 265.3

Cat No.

: SA22608

Diltiazem, Impurities

N-Boc Diltiazem

$255.00 25 mg

In Stock

CAS No.

: 1289643-62-4

Mol F.

: C25H30N2O6S

Mol W.

: 486.58

Cat No.

: SA19517

Impurities, Linagliptin

N-Boc Linagliptin

Please enquire for price & pack size

In Stock

CAS No.

: 668273-75-4

Mol F.

: C30H36N8O4

Mol W.

: 572.66

Cat No.

: SA49904

Impurities, Linagliptin

N-Boc Linagliptin Bromo Impurity D

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C30H37BrN8O4

Mol W.

: 653.57

Cat No.

: SA49952

Impurities, Sitagliptin

N-Boc Oxo Sitagliptin Impurity

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C21H21F6N5O4

Mol W.

: 521.41

Cat No.

: SA10449

Impurities, Sitagliptin

N-Boc Sitagliptin Acid Impurity

$80.00 25 mg

In Stock

CAS No.

: 486460-00-8

Mol F.

: C15H18F3NO4

Mol W.

: 333.3

Cat No.

: SA10419

Impurities, Sitagliptin

N-Boc triazolo[4,3-a]pyrazine Impurity

$80.00 25 mg

In Stock

CAS No.

: 877402-43-2

Mol F.

: C11H15F3N4O2

Mol W.

: 292.26

Cat No.

: SA10431

Impurities, Sitagliptin

N-Boc-Sitagliptin

$95.00 25 mg

In Stock

CAS No.

: 486460-23-5

Mol F.

: C21H23F6N5O3

Mol W.

: 507.43

Cat No.

: SA10407

Impurities, Sitagliptin

N-butanoyl Sitagliptin

$175.00 25 mg

In Stock

CAS No.

Mol F.

: C21H23FN5O2

Mol W.

: 491.43

Cat No.

: SA10405

Efavirenz, Impurities

N-Carbamate open ring Efavirenz

Please enquire for price & pack size

In Stock

CAS No.

: 211563-40-5

Mol F.

: C15H13ClF3NO3

Mol W.

: 347.72

Cat No.

: SA17610

Carbamazepine, Impurities

N-Carbamoyl Oxcarbazepine

$295.00 25 mg

In Stock

CAS No.

: 2642430-30-4

Mol F.

: C16H16N3O3

Mol W.

: 295.29

Cat No.

: SA20335

Clarithromycin, Impurities

N-Demethyl-N-formyl Clarithromycin

Please enquire for price & pack size

In Stock

CAS No.

: 127140-69-6

Mol F.

: C38H67NO14

Mol W.

: 761.94

Cat No.

: SA17202

Impurities, Linagliptin

N-Depiperidin-3-Amine Linagliptin Dimer

Please enquire for price & pack size

In Stock

CAS No.

: 2253964-98-4

Mol F.

: C45H44N14O4

Mol W.

: 844.92

Cat No.

: SA49936

Bumetanide, Impurities

N-Desbutyl-N-propyl Bumetanide

$250.00 25 mg

In Stock

CAS No.

: 28395-28-0

Mol F.

: C16H18N2O5S

Mol W.

: 350.39

Cat No.

: SA24405

Diltiazem, Impurities

N-Desdimethylaminoethyl O-Desacetyl Diltiazem 2-Epimer

$595.00 25 mg

In Stock

CAS No.

: 30825-34-4

Mol F.

: C16H15NO3S

Mol W.

: 301.36

Cat No.

: SA19524

Impurities, Loratadine

N-Desmethyl Azatadine

$255.00 25 mg

In Stock

CAS No.

: 38092-95-4

Mol F.

: C19H20N2

Mol W.

: 276.38

Cat No.

: SA34031

Clarithromycin, Impurities

N-Desmethyl Clarithromycin

Please enquire for price & pack size

In Stock

CAS No.

: 101666-68-6

Mol F.

: C37H67NO13

Mol W.

: 733.93

Cat No.

: SA17201

Edoxaban, Impurities

N-Desmethyl Edoxaban

Please enquire for price & pack size

In Stock

CAS No.

: 480449-52-3

Mol F.

: C23H28ClN7O4S

Mol W.

: 534.03

Cat No.

: SA33009

Impurities, Venlafaxine

N-Desmethyl Elimination Impurity

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C16H23NO

Mol W.

: 245.36

Cat No.

: SA22737

Impurities, Nintedanib

N-Desmethyl Nintedanib

Please enquire for price & pack size

In Stock

CAS No.

: 334951-61-0

Mol F.

: C30H31N5O4

Mol W.

: 525.6

Cat No.

: SA22531

Impurities, Terbinafine

N-Desmethyl Terbinafine

Please enquire for price & pack size

In Stock

CAS No.

: 99473-11-7

Mol F.

: C20H23N

Mol W.

: 277.71

Cat No.

: SA25719

Diltiazem, Impurities

N-Desmethyl-N-acetyl Diltiazem

$295.00 25 mg

In Stock

CAS No.

: 86408-44-8

Mol F.

: C23H26N2O5S

Mol W.

: 442.53

Cat No.

: SA19515

Cephalexin, Impurities

N-Ethoxycarbonyl-7-ADCA

Please enquire for price & pack size

In Stock

CAS No.

: 72820-16-7

Mol F.

: C11H14N2O5S

Mol W.

: 286.3

Cat No.

: SA12004

Apremilast, Impurities

N-Formyl Apremilast Imp

$255.00 25 mg

In Stock

CAS No.

: 2077897-94-8

Mol F.

: C21H22N2O7S

Mol W.

: 446.47

Cat No.

: SA30019