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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, 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 Impurity 18

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CAS No.

: NA

Mol F.

: C49H52ClF2N11O11S

Mol W.

: 1076.52

Cat No.

: SA44138

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, Pregabalin

Isobutylglutarmonoamide (S-Isomer)

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CAS No.

: NA

Mol F.

: C9H17NO3

Mol W.

: 187.24

Cat No.

: SA24851

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

Impurities, Tenofovir

Isopropyl Carbamate Mono-POC Tenofovir (Racemic)

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CAS No.

: NA

Mol F.

: C18H28N5O9P

Mol W.

: 489.42

Cat No.

: SA36940

Dapagliflozin, Impurities

Isopropyl Methanesulfonate Impurity

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CAS No.

: 926-06-7

Mol F.

: C4H10O3S

Mol W.

: 138.19

Cat No.

: SA15040

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, Ivermectin

Ivermectin

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CAS No.

: 70288-86-7

Mol F.

: C48H74O14

Mol W.

: 875.1

Cat No.

: SA54200

Impurities, Tiagabine

Keto Tiagabine

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CAS No.

: 161014-55-7

Mol F.

: C20H25NO3S2

Mol W.

: 391.55

Cat No.

: SA10502

Impurities, Ketoconazole

Ketoconazole

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CAS No.

: 65277-42-1

Mol F.

: C26H28Cl2N4O4

Mol W.

: 531.4

Cat No.

: SA54900

Impurities, Ketoconazole

Ketoconazole Bisulfite Impurity

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CAS No.

: NA

Mol F.

: C26H28Cl2N4O7S

Mol W.

: 611.5

Cat No.

: SA54912

Impurities, Ketoconazole

Ketoconazole EP Impurity A

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CAS No.

: 254912-63-5

Mol F.

: C26H26Cl2N4O4

Mol W.

: 529.4

Cat No.

: SA54902

Impurities, Ketoconazole

Ketoconazole EP Impurity B

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CAS No.

: 1346598-39-7

Mol F.

: C38H42Cl2N6O6

Mol W.

: 749.7

Cat No.

: SA54903

Impurities, Ketoconazole

Ketoconazole EP Impurity C

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CAS No.

: 83374-59-8

Mol F.

: C26H28Cl2N4O4

Mol W.

: 531.4

Cat No.

: SA54904

Impurities, Ketoconazole

Ketoconazole EP Impurity D

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CAS No.

: 67914-61-8

Mol F.

: C24H26Cl2N4O3

Mol W.

: 489.4

Cat No.

: SA54901

Impurities, Ketoconazole

Ketoconazole EP Impurity E

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CAS No.

: 134071-44-6

Mol F.

: C21H20Cl2N2O5S

Mol W.

: 483.4

Cat No.

: SA54905

Impurities, Ketoconazole

Ketoconazole Hydroxy Impurity

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CAS No.

: NA

Mol F.

: C26H28Cl2N4O5

Mol W.

: 547.4

Cat No.

: SA54907

Impurities, Ketoconazole

Ketoconazole Hydroxymethyl Impurity

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CAS No.

: 170210-42-1

Mol F.

: C14H14Cl2N2O3

Mol W.

: 329.2

Cat No.

: SA54909

Impurities, Ketoconazole

Ketoconazole N-Oxide

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CAS No.

: 254912-65-7

Mol F.

: C26H28Cl2N4O5

Mol W.

: 547.4

Cat No.

: SA54908

Impurities, Ketoconazole, Nitrosamine

Ketoconazole Nitroso EP Impurity D

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CAS No.

: NA

Mol F.

: C24H25Cl2N5O4

Mol W.

: 518.4

Cat No.

: SA54911

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

Impurities, Ketoprofen

Ketoprofen EP Impurity I

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CAS No.

: 21288-34-6

Mol F.

: C15H11NO

Mol W.

: 221.25

Cat No.

: SA36609

Impurities, Ketoprofen

Ketoprofen EP Impurity K

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CAS No.

: NA

Mol F.

: C19H20O3

Mol W.

: 296.36

Cat No.

: SA36610