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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, Iohexol

Iohexol EP Impurity O

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CAS No.

: 2725999-26-6

Mol F.

: C21H28I3N3O10

Mol W.

: 863.17

Cat No.

: SA31515

Impurities, Iohexol

Iohexol EP Impurity P

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CAS No.

: NA

Mol F.

: C21H28I3N3O10

Mol W.

: 863.17

Cat No.

: SA31516

Impurities, Iohexol

Iohexol EP Impurity Q

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CAS No.

: NA

Mol F.

: C21H28I3N3O10

Mol W.

: 863.17

Cat No.

: SA31517

Impurities, Iohexol

Iohexol USP Related Compound C

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CAS No.

: 76820-34-3

Mol F.

: C14H16I3N3O8

Mol W.

: 735.01

Cat No.

: SA31518

Impurities, Ipratropium Bromide

Ipratropium Bromide

$100.00 25 mg

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CAS No.

: 60205-81-4 (Anhydrous); 66985-17-9

Mol F.

: C20H30BrNO3

Mol W.

: 412.36

Cat No.

: SA36000

Impurities, Iptacopan

Iptacopan | CAS : 1644670-37-0

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CAS No.

: 1644670-37-0

Mol F.

: C25H30N2O4

Mol W.

: 422.53

Cat No.

: SA52900

Impurities, Iptacopan

Iptacopan RS Isomer

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CAS No.

: NA

Mol F.

: C25H30N2O4

Mol W.

: 422.53

Cat No.

: SA52903

Impurities, Iptacopan

Iptacopan-RR Isomer

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CAS No.

: 1644670-39-2

Mol F.

: C25H30N2O4

Mol W.

: 422.53

Cat No.

: SA52901

Impurities, Iptacopan

Iptacopan-SR Isomer

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CAS No.

: 3057514-75-4

Mol F.

: C25H30N2O4

Mol W.

: 422.53

Cat No.

: SA52902

Impurities, Irbesartan

Irbesartan

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CAS No.

: 138402-11-6

Mol F.

: C25H28N6O

Mol W.

: 428.53

Cat No.

: SA23304

Impurities, Irbesartan

Irbesartan Bromo N2-Trityl Impurity

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CAS No.

: 133051-88-4

Mol F.

: C33H25BrN4

Mol W.

: 557.48

Cat No.

: SA23302

Impurities, Irbesartan

Irbesartan Bromo Nitrile Impurity

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CAS No.

: 114772-54-2

Mol F.

: C14H10BrN

Mol W.

: 272.14

Cat No.

: SA23303

Impurities, Irbesartan

Irbesartan Cyano Dimer Impurity

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CAS No.

: NA

Mol F.

: C39H36N4O

Mol W.

: 576.73

Cat No.

: SA23316

Impurities, Irbesartan

Irbesartan Dibromomethyl Impurity

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CAS No.

: 209911-63-7

Mol F.

: C14H9Br2N

Mol W.

: 351.04

Cat No.

: SA23305

Impurities, Irbesartan

Irbesartan Dimer Impurity

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CAS No.

: 1346598-52-4

Mol F.

: C39H38N10O

Mol W.

: 662.79

Cat No.

: SA23312

Impurities, Irbesartan

Irbesartan EP Impurity A

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CAS No.

: 748812-53-5

Mol F.

: C25H30N6O2

Mol W.

: 446.54

Cat No.

: SA23306

Impurities, Irbesartan

Irbesartan Methyl Impurity

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CAS No.

: 120568-11-8

Mol F.

: C14H12N4

Mol W.

: 236.27

Cat No.

: SA23309

Impurities, Irbesartan

Irbesartan N2-Trityl Impurity

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CAS No.

: 886999-35-5

Mol F.

: C44H42N6O

Mol W.

: 670.84

Cat No.

: SA23310

Impurities, Irbesartan

Irbesartan Propyl Analog

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CAS No.

: 158778-58-6

Mol F.

: C24H26N6O

Mol W.

: 414.5

Cat No.

: SA23311

Impurities, Isavuconazole

Isavuconazole hydroxy methyl impurity

$1,200.00 25 mg

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CAS No.

: 2761502-58-1

Mol F.

: C32H30F2N7O4S

Mol W.

: 682.14/646.20 (Free base)

Cat No.

: SA44104

Impurities, Isavuconazole

Isavuconazole Methyl ester Impurity

$1,050.00 25 mg

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CAS No.

Mol F.

: C41H46ClF2N7O9S

Mol W.

: 886.36

Cat No.

: SA44115

Impurities, Olmesartan Medoxomil

Iso Butylimidazole Imtermediate

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CAS No.

: 1346598-38-6

Mol F.

: C13H22N2O3

Mol W.

: 254.33

Cat No.

: SA17738

Ganciclovir, Impurities

Iso Ganciclovir

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CAS No.

: 86357-09-7

Mol F.

: C₉H₁₃N₅O₄

Mol W.

: 255.23

Cat No.

: SA13708

Impurities, Loratadine

Iso Loratadine A

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CAS No.

: 169253-13-8

Mol F.

: C22H23ClN2O2

Mol W.

: 382.88

Cat No.

: SA34035

Aciclovir, Impurities

Iso-Aciclovir

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CAS No.

: 374697-95-7

Mol F.

: C8H11N5O3

Mol W.

: 225.2

Cat No.

: SA21427

Gatifloxacin, Impurities

Iso-Gatifloxacin; Gatifloxacin 2-Methyl Isomer

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CAS No.

: 1029364-65-5

Mol F.

: C19H21FN3O4

Mol W.

: 375.39

Cat No.

: SA37905

Impurities, Niacin

Isocinchomeronic acid

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CAS No.

: 100-26-5

Mol F.

: C7H5NO4

Mol W.

: 167.12

Cat No.

: SA33100

Ethisterone, Impurities

Isodanazol

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CAS No.

: 161696-95-3

Mol F.

: C₂₂H₂₇NO₂

Mol W.

: 337.46

Cat No.

: SA12903

Impurities, Nicotine

Isonicotine

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CAS No.

: 92118-22-4

Mol F.

: C₁₀H₁₄N₂

Mol W.

: 162.23

Cat No.

: SA32212

Impurities, Niacin

Isonicotinic acid

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CAS No.

: 55-22-1

Mol F.

: C6H5NO3

Mol W.

: 139.11000000000001

Cat No.

: SA33102

Impurities, Isoproterenol

Isoprenaline; Isoproterenol

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CAS No.

: 7683-59-2 (Base); 5178-52-9 (HCl salt)

Mol F.

: C11H17NO3

Mol W.

: 211.26

Cat No.

: SA25900

Impurities, Nirmatrelvir

Isopropyl (S)-2-amino-3-((S)-2-oxopyrrolidin-3-yl)propanoate

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CAS No.

: NA

Mol F.

: C10H18N2O3

Mol W.

: 214.3

Cat No.

: SA46911

Dapagliflozin, Impurities

Isopropyl Methanesulfonate Impurity

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CAS No.

: 926-06-7

Mol F.

: C4H10O3S

Mol W.

: 138.19

Cat No.

: SA15040

Impurities, P-TOLUENESULFONATE

ISOPROPYL-P-TOLUENE SULPHONATE ESTER

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CAS No.

: 2307-69-9

Mol F.

: C10H14O3S

Mol W.

: 214.28

Cat No.

: SA23400

Clindamycin, Impurities

Isopropylidene Lincomycin

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CAS No.

Mol F.

: C21H38N2O6S

Mol W.

: 446.6

Cat No.

: SA29718

Impurities, Isoquinoline

Isoquinoline

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CAS No.

: 119-65-3

Mol F.

: C₉H₇N

Mol W.

: 129.16

Cat No.

: SA19300

Impurities, Isoquinoline

Isoquinoline N-oxide

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CAS No.

: 1532-72-5

Mol F.

: C9H7NO

Mol W.

: 145.16

Cat No.

: SA19311

Impurities, Isoquinoline

Isoquinoline-3-carboxylic Acid

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CAS No.

: 6624-49-3

Mol F.

: C₁₀H₇NO₂

Mol W.

: 173.17

Cat No.

: SA19310

Impurities, Isoquinoline

Isoquinoline-5-Sulfonic Acid

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CAS No.

: 27655-40-9

Mol F.

: C9H7N4O3S

Mol W.

: 209.23

Cat No.

: SA19307

Impurities, Isoquinoline

Isoquinoline-6-sulfonic Acid

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CAS No.

: NA

Mol F.

: C9H7NO3S

Mol W.

: 209.23

Cat No.

: SA19306

Impurities, Tiagabine

Keto Tiagabine

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CAS No.

: 161014-55-7

Mol F.

: C20H25NO3S2

Mol W.

: 391.55

Cat No.

: SA10502

Impurities, Ketoprofen

Ketoprofen

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CAS No.

: 22071-15-4

Mol F.

: C16H14O3

Mol W.

: 254.28

Cat No.

: SA36600

Impurities, Ketoprofen

Ketoprofen EP Impurity A

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CAS No.

: 66067-44-5

Mol F.

: C15H12O2

Mol W.

: 224.25

Cat No.

: SA36601

Impurities, Ketoprofen

Ketoprofen EP Impurity B

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CAS No.

: 22071-22-3

Mol F.

: C15H12O3

Mol W.

: 240.25

Cat No.

: SA36602

Impurities, Ketoprofen

Ketoprofen EP Impurity C

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CAS No.

: 68432-95-1

Mol F.

: C10H10O4

Mol W.

: 194.18

Cat No.

: SA36603

Impurities, Ketoprofen

Ketoprofen EP Impurity D

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CAS No.

: 107257-20-5

Mol F.

: C17H16O3

Mol W.

: 268.31

Cat No.

: SA36604

Impurities, Ketoprofen

Ketoprofen EP Impurity E

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CAS No.

: 59512-16-2

Mol F.

: C16H15NO2

Mol W.

: 253.29

Cat No.

: SA36605

Impurities, Ketoprofen

Ketoprofen EP Impurity F

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CAS No.

: 42872-30-0

Mol F.

: C16H13NO

Mol W.

: 235.28

Cat No.

: SA36606

Impurities, Ketoprofen

Ketoprofen EP Impurity G

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CAS No.

: 5537-71-3

Mol F.

: C10H9NO2

Mol W.

: 175.18

Cat No.

: SA36607

Impurities, Ketoprofen

Ketoprofen EP Impurity H

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CAS No.

: 5689-33-8

Mol F.

: C9H7NO2

Mol W.

: 161.16

Cat No.

: SA36608