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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, Remdesivir

7-Bromopyrrolo[2,1-f][1,2,4]triazin-4-amine

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Out of Stock

CAS No.

: 937046-98-5

Mol F.

: C6H5BrN4

Mol W.

: 213

Cat No.

: SA42726

Impurities, Lorcaserin

7-Chloro analog

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Out of Stock

CAS No.

: 616201-89-9

Mol F.

: C11H14ClN

Mol W.

: 195.69

Cat No.

: SA18811

Impurities, Ribociclib

7-cyclopentyl-2-((3-hydroxy-5-(piperazin-1-yl)pyridin-2-yl)amino)-N,N-dimethyl-7H-pyrrolo[2,3-d]pyrimidine-6-carboxamide

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Out of Stock

CAS No.

: NA

Mol F.

: C23H30N8O2

Mol W.

: 450.55

Cat No.

: SA47103

Impurities, Ribociclib

7-cyclopentyl-2-((3,6-dihydroxy-5-(piperazin-1-yl)pyridin-2-yl)amino)-N,N-dimethyl-7H-pyrrolo[2, 3-d]pyrimidine-6-carboxamide

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Out of Stock

CAS No.

: NA

Mol F.

: C23H30N8O3

Mol W.

: 466.55

Cat No.

: SA47100

Impurities, Ribociclib

7-cyclopentyl-2-((5-((2-formamidoethyl)amino)pyridin-2-yl)amino)-N,N-dimethyl-7H-pyrrolo[2,3-d]pyrimidine-6-carboxamide

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Out of Stock

CAS No.

: NA

Mol F.

: C22H28N8O2

Mol W.

: 436.52

Cat No.

: SA47106

Impurities, Ribociclib

7-cyclopentyl-2-((5-(4-formylpiperazin-1-yl)pyridin-2-yl)amino)-N,N-dimethyl-7H-pyrrolo[2,3-d]pyrimidine-6-carboxamide

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Out of Stock

CAS No.

: NA

Mol F.

: C24H30N8O2

Mol W.

: 462.56

Cat No.

: SA47105

Impurities, Ribociclib

7-cyclopentyl-6-(dimethylcarbamoyl)-2-(5-(piperazin-1-yl)pyridin-2-ylamino)-7H-pyrrolo[2,3-d]pyrimidine 7-oxide

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Out of Stock

CAS No.

: NA

Mol F.

: C23H30N8O2

Mol W.

: 450.54

Cat No.

: SA47118

Impurities, Ribociclib

7-cyclopentyl-N-(hydroxymethyl)-N-methyl-2-((5-(piperazin-1-yl)pyridin-2-yl)amino)-7H-p yrrolo[2,3-d]pyrimidine-6-carboxamide

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Out of Stock

CAS No.

: NA

Mol F.

: C23H30N8O2

Mol W.

: 450.55

Cat No.

: SA47102

Impurities, Ribociclib

7-Cyclopentyl-N,N-dimethyl-2-(nitroso(5-(4-nitrosopiperazin-1-yl)pyridin-2-yl)amino)-7H-pyrrolo[2,3-d]pyrimidine-6-carboxamide

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Out of Stock

CAS No.

: NA

Mol F.

: C23H28N10O3

Mol W.

: 492.5

Cat No.

: SA47109

Impurities, Ribociclib

7-Cyclopentyl-N,N-dimethyl-2-(nitroso(5-(piperazin-1-yl)pyridin-2-yl)amino)-7H-pyrrolo[2,3-d]pyrimidine-6-carboxamide

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Out of Stock

CAS No.

: NA

Mol F.

: C23H29N9O2

Mol W.

: 463.5

Cat No.

: SA47108

Aripiprazole, Impurities

7-Hydroxyquinolinone

Please enquire for price & pack size

Out of Stock

CAS No.

: 70500-72-0

Mol F.

: C9H7NO2

Mol W.

: 161.16

Cat No.

: SA24023

Impurities, Remdesivir

7-Iodopyrrolo[2,1-f][1,2,4]triazin-4-amine

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Out of Stock

CAS No.

: 1770840-43-1

Mol F.

: C6H5IN4

Mol W.

: 260

Cat No.

: SA42725

Impurities, Isoquinoline

7-methoxy-3,4-dihydroisoquinoline

Please enquire for price & pack size

Out of Stock

CAS No.

: 184913-19-7;1216775-99-3(HClsalt)

Mol F.

: C10H11NO

Mol W.

: 161.19999999999999

Cat No.

: SA19303

Erlotinib, Impurities

7-O-Desmethyl Erlotinib

Please enquire for price & pack size

Out of Stock

CAS No.

: 183320-29-8 (base); 183365-34-6 (HCl salt)

Mol F.

: C21H21N3O4

Mol W.

: 379.41

Cat No.

: SA25205

Hydrochlorothiazide, Impurities

7-Sulfonamido-N-hydroxymethyl Hydrochlorothiazide

Please enquire for price & pack size

Out of Stock

CAS No.

: 2958-18-1

Mol F.

: C₈H₁₀ClN₃O₅S₂

Mol W.

: 327.77

Cat No.

: SA11207

Brexpiprazole, Impurities

7,7’-[(1,4-Butanediyl)bis(oxy)]bis-2(1H)quinolinone

Please enquire for price & pack size

Out of Stock

CAS No.

: 2116542-19-7

Mol F.

: C22H20N2O4

Mol W.

: 376.41

Cat No.

: SA41318

Bromfenac, Impurities

7,7’-Bis(4-bromobenzoyl) Isoindigo

Please enquire for price & pack size

Out of Stock

CAS No.

: 1798431-98-7

Mol F.

: C30H16Br2N2O4

Mol W.

: 628.37

Cat No.

: SA18911

Brexpiprazole, Impurities

7,7′-[1,4-Piperazinediylbis(4,1-butanediyloxy)]bis-2(1H)-quinolinone

Please enquire for price & pack size

Out of Stock

CAS No.

: 2220149-92-6

Mol F.

: C30H36N4O4

Mol W.

: 516.63

Cat No.

: SA41335

Impurities, Isoquinoline

7,8-dimethoxy-3,4-dihydroisoquinoline

Please enquire for price & pack size

Out of Stock

CAS No.

: 75877-72-4

Mol F.

: C11H13NO2

Mol W.

: 191.23

Cat No.

: SA19308

Hydrocortisone Valerate, Impurities

7(α/β)-Hydroxy-hydrocortisone-17-valerate

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C26H38O7

Mol W.

: 462.57

Cat No.

: SA27309

Allopurinol, Impurities

7N-[1-(2-Carboxy)ethyl]allopurinol

Please enquire for price & pack size

Out of Stock

CAS No.

: 34397-00-7

Mol F.

: C8H8N4O3

Mol W.

: 208.17

Cat No.

: SA28907

Fulvestrant, Impurities

7β-[9-[[9-[(4,4,5,5,5-Pentafluoropentyl)sulfenyl]nonyl]sulfenyl]nonyl]estra-4-ene-3,17β-diol-17-Acetate

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C43H69F5O3S2

Mol W.

Cat No.

: SA11816

Guanine, Impurities

8-Aminoguanine

Please enquire for price & pack size

Out of Stock

CAS No.

: 28128-41-8

Mol F.

: C₅H₆N₆O

Mol W.

: 166.14

Cat No.

: SA32101

Guanine, Impurities

8-Azaguanine

Please enquire for price & pack size

Out of Stock

CAS No.

: 134-58-7

Mol F.

: C₄H₄N₆O

Mol W.

: 152.11

Cat No.

: SA32103

Guanine, Impurities

8-Bromoguanine

Please enquire for price & pack size

Out of Stock

CAS No.

: 3066-84-0

Mol F.

: C₅H₄BrN₅O

Mol W.

: 230.02

Cat No.

: SA32104

Impurities, Midazolam

8-chloro-6-(2-fluorophenyl)-1-methyl-3a,4-dihydro-3H-imidazo[1,5-a][1,4]benzodiazepine

Please enquire for price & pack size

Out of Stock

CAS No.

: 59467-69-5

Mol F.

: C18H15ClFN3

Mol W.

: 327.78

Cat No.

: SA44301

Impurities, Indacaterol

8-Hydroxy-3,4-dihydroquinolin-2-oxo-indacaterol

Please enquire for price & pack size

Out of Stock

CAS No.

: 1403389-05-8

Mol F.

: C24H30N2O3

Mol W.

: 394.5

Cat No.

: SA48709

Impurities, Isoquinoline

8-methoxy-3,4-dihydroisoquinoline

Please enquire for price & pack size

Out of Stock

CAS No.

: 24693-44-5;24693-45-6(HClsalt)

Mol F.

: C10H11NO

Mol W.

: 161.19999999999999

Cat No.

: SA19304

Guanine, Impurities

9-(2-Hydroxyethyl)guanine

Please enquire for price & pack size

Out of Stock

CAS No.

: 23169-33-7

Mol F.

: C₇H₉N₅O₂

Mol W.

: 195.18

Cat No.

: SA32108

Fulvestrant, Impurities

9-[[9-[(4,4,5,5,5-Pentafluoropentyl)sulfenyl]nonyl]sulfenyl]nonanol

Please enquire for price & pack size

Out of Stock

CAS No.

: 1391053-10-3

Mol F.

: C23H45F5OS2

Mol W.

: 494.71

Cat No.

: SA11819

Fulvestrant, Impurities

9-[[9-[(4,4,5,5,5-Pentafluoropentyl)sulfenyl]nonyl]sulfenyl]nonyl Bromide

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C23H42BrF5S2

Mol W.

: 557.61

Cat No.

: SA11818

Flunisolide, Impurities

9-Alpha Br Flunisolide (RC D) Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H30BrFO6

Mol W.

: 513.39

Cat No.

: SA47511

Guanine, Impurities

9-Carboxymethoxymethylguanine

Please enquire for price & pack size

Out of Stock

CAS No.

: 80685-22-9

Mol F.

: C₈H₉N₅O₄

Mol W.

: 239.19

Cat No.

: SA32105

Aciclovir, Impurities

9-Demethoxyethanol-9-propanol IsoAciclovir

Please enquire for price & pack size

Out of Stock

CAS No.

: 131918-95-1

Mol F.

: C8H11N5O2

Mol W.

: 209.21

Cat No.

: SA21426

Halcinonide, Impurities

9-Desfluoro-11-keto halcinonide

Please enquire for price & pack size

Out of Stock

CAS No.

: 2414269-43-3

Mol F.

: C24H31ClO5

Mol W.

: 434.95

Cat No.

: SA30403

Impurities, Prednisolone

9-fluoro prednisolone Impurity | CAS : 338-95-4

Please enquire for price & pack size

Out of Stock

CAS No.

: 338-95-4

Mol F.

: C21H27FO5

Mol W.

: 378.4

Cat No.

: SA16720

Ganciclovir, Impurities

9-Methoxymethyl Guanine

Please enquire for price & pack size

Out of Stock

CAS No.

: 1202645-50-8

Mol F.

: C₇H₉N₅O₂

Mol W.

: 195.18

Cat No.

: SA13713

Allopurinol, Impurities

9-Methylallopurinol

Please enquire for price & pack size

Out of Stock

CAS No.

: 5334-56-5

Mol F.

: C6H6N4O

Mol W.

: 150.14

Cat No.

: SA28908

Halcinonide, Impurities

9,11β-epoxy-Halcinonide

Please enquire for price & pack size

Out of Stock

CAS No.

: 82427-96-1

Mol F.

: C24H31ClO5

Mol W.

: 434.95

Cat No.

: SA30412

Impurities, Methylprednisolone

9α-Bromo-16α-methylprednisolone

$295.00 25 mg

Out of Stock

CAS No.

: 26543-61-3

Mol F.

: C22H29BrO5

Mol W.

: 453.37

Cat No.

: SA14417

Desonide, Impurities

9α-Bromodesonide

Please enquire for price & pack size

Out of Stock

CAS No.

: 39672-77-0

Mol F.

: C₂₄H₃₁BrO₆

Mol W.

: 495.4

Cat No.

: SA19006

Abacavir, Impurities

Abacavir

$80.00 25 mg

Out of Stock

CAS No.

: 136470-78-5

Mol F.

: C14H18N6O

Mol W.

: 286.33

Cat No.

: SA18113

Abacavir, Impurities

Abacavir 2-Hydroxy Impurity

$1,555.00 25 mg

Out of Stock

CAS No.

Mol F.

: C14H20N6O2

Mol W.

: 304.35

Cat No.

: SA18114

Abacavir, Impurities

Abacavir 5’-Phosphate

$595.00 25 mg

Out of Stock

CAS No.

: 136470-77-4

Mol F.

: C14H19N6O4P

Mol W.

: 366.31

Cat No.

: SA18109

Abacavir, Impurities

Abacavir Carboxylate

$595.00 25 mg

Out of Stock

CAS No.

: 384380-52-3

Mol F.

: C14H16N6O2

Mol W.

: 300.32

Cat No.

: SA18108

Abacavir, Impurities

Abacavir EP Impurity A

$1,455.00 25 mg

Out of Stock

CAS No.

: 136470-79-6

Mol F.

: C14H18N6O

Mol W.

: 286.33

Cat No.

: SA18125

Abacavir, Impurities

Abacavir EP Impurity D

$1,555.00 25 mg

Out of Stock

CAS No.

: 783292-37-5(base);267668-71-3(HClsalt)

Mol F.

: C14H20Cl2N6O

Mol W.

: 359.25

Cat No.

: SA18126

Abacavir, Impurities

Abacavir EP Impurity F

$295.00 25 mg

Out of Stock

CAS No.

: 1443421-68-8

Mol F.

: C18H26N6O

Mol W.

: 342.44

Cat No.

: SA18120

Abacavir, Impurities

Abacavir Impurity 4; Abaca-1 Impurity

$195.00 25 mg

Out of Stock

CAS No.

: 171887-04-0

Mol F.

: C11H14ClN5O2

Mol W.

: 283.71

Cat No.

: SA18103

Abacavir, Impurities

Abacavir Impurity 5; Abaca-2 Impurity

$95.00 25 mg

Out of Stock

CAS No.

: 172015-79-1; 136522-33-3

Mol F.

: C11H12ClN5O

Mol W.

: 265.7

Cat No.

: SA18104