Home / Products / Impurities

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.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Impurities, Venlafaxine

O-Desmethyl Venlafaxine N-Dimer | CAS : 1187545-61-4

$1,995.00 50 mg

PLEASE ENQUIRE

CAS No.

: 1187545-61-4

Mol F.

: C32H48N2O4

Mol W.

: 524.7

Cat No.

: SA22728

Cefadroxil, Impurities

O-Ethoxycarbonyl Cefadroxil

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 2378158-44-0

Mol F.

: C19H21N3O7S

Mol W.

: 435.45

Cat No.

: SA42302

Ezetimibe, Impurities

O-Fluoro oxazolidone

$100.00 25 mg

PLEASE ENQUIRE

CAS No.

: 2514695-40-8

Mol F.

: C20H18FNO4

Mol W.

: 355.36

Cat No.

: SA14832

Brimonidine, Impurities

O-Isopropyl (5-Bromoquinoxalin-6-yl)carbamothioate

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C12H12BrOS

Mol W.

: 326.20999999999998

Cat No.

: SA20716

Impurities, Olmesartan Medoxomil

O-Methyl Ether Olmesartan Acid

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1039762-40-7

Mol F.

: C25H28N6O3

Mol W.

: 460.53

Cat No.

: SA17736

Impurities, Ofloxacin

Ofloxacin

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 82419-36-1

Mol F.

: C18H20FN304

Mol W.

: 361.4

Cat No.

: SA55700

Impurities, Ofloxacin

Ofloxacin EP Impurity A

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 82419-35-0

Mol F.

: C13H9F2NO4

Mol W.

: 281.2

Cat No.

: SA55701

Impurities, Ofloxacin

Ofloxacin EP Impurity E

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 82419-52-1

Mol F.

: C17H18FN3O4

Mol W.

: 347.3

Cat No.

: SA55702

Impurities, Olaparib

Olaparib

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C24H23FN4O3

Mol W.

: 434.46

Cat No.

: SA37400

Impurities, Olaparib

Olaparib 3-Hydroxypiperazine Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C24H23FN4O4

Mol W.

: 450.46

Cat No.

: SA37404

Impurities, Olaparib

Olaparib Descyclopropanecarbonyl Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C20H19FN4O2

Mol W.

: 366.39

Cat No.

: SA37401

Impurities, Olaparib

Olaparib Hydroxy Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1460272-53-0

Mol F.

: C24H23FN4O4

Mol W.

: 450.46

Cat No.

: SA37403

Impurities, Nitrosamine, Olaparib

Olaparib N-Nitroso Piperazine Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 2742659-74-9

Mol F.

: C20H18FN5O3

Mol W.

: 395.39

Cat No.

: SA37405

Impurities, Olaparib

Olaparib Piperazine Open Ring Analogue

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C24H25FN4O4

Mol W.

: 452.48

Cat No.

: SA37402

Impurities, Olmesartan Medoxomil

Olmesartan (5-acetyl) Imidazolyl Impurity | CAS : 2411637-68-6

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 2411637-68-6

Mol F.

: C11H18N2O2

Mol W.

: 210.3

Cat No.

: SA17758

Impurities, Olmesartan Medoxomil

Olmesartan amide Dimer Impurity

$495.00 25 mg

PLEASE ENQUIRE

CAS No.

Mol F.

: C53H54N12O8

Mol W.

: 987.07

Cat No.

: SA17755

Impurities, Olmesartan Medoxomil

Olmesartan Anhydro Acid Ethyl Ester

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C26H28N6O2

Mol W.

: 456.54

Cat No.

: SA17724

Impurities, Olmesartan Medoxomil

Olmesartan Anhydro Acid N1-Trityl Ethyl Ester

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C45H42N6O2

Mol W.

: 698.85

Cat No.

: SA17723

Impurities, Olmesartan Medoxomil

Olmesartan Bis-medoxomil (1H-1-Medoxomil + 2H-2-Medoxomil Mixture)

$495.00 25 mg

PLEASE ENQUIRE

CAS No.

: 1392475-91-0

Mol F.

: C34H34N6O9

Mol W.

: 670.67

Cat No.

: SA17742

Impurities, Olmesartan Medoxomil

Olmesartan Imidazole 2-hydroxybutanyl Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 172875-53-5

Mol F.

: C13H22N2O3

Mol W.

: 254.33

Cat No.

: SA17759

Impurities, Olmesartan Medoxomil

Olmesartan Imidazole Diacid Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 58954-23-7

Mol F.

: C8H10N2O4

Mol W.

: 198.18

Cat No.

: SA17753

Impurities, Olmesartan Medoxomil

Olmesartan Impurity SA17752

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1392475-91-0

Mol F.

: C34H34N6O9

Mol W.

: 670.67

Cat No.

: SA17752

Impurities, Olmesartan Medoxomil

Olmesartan Medoxomil Azide Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C29H29N9O5

Mol W.

: 583.60

Cat No.

: SA17760

Impurities, Olmesartan Medoxomil

Olmesartan Medoxomil Ethyl Methyl Analog

$195.00 25 mg

PLEASE ENQUIRE

CAS No.

: 1378863-74-1

Mol F.

: C30H32N6O6

Mol W.

: 572.61

Cat No.

: SA17703

Impurities, Olmesartan Medoxomil

Olmesartan Medoxomil Methyl Ether

$395.00 25 mg

PLEASE ENQUIRE

CAS No.

: 896419-17-3

Mol F.

: C30H32N6O6

Mol W.

: 572.61

Cat No.

: SA17732

Impurities, Olmesartan Medoxomil

Olmesartan Methyl Ester

$195.00 25 mg

PLEASE ENQUIRE

CAS No.

: 1347262-29-6

Mol F.

: C25H28N6O3

Mol W.

: 460.53

Cat No.

: SA17734

Impurities, Olmesartan Medoxomil

Olmesartan Methyl Ketone

$495.00 25 mg

PLEASE ENQUIRE

CAS No.

: 1227626-45-0

Mol F.

: C25H28N6O2

Mol W.

: 444.53

Cat No.

: SA17733

Impurities, Olmesartan Medoxomil

Olmesartan N1-Trityl Impurity

$95.00 25 mg

PLEASE ENQUIRE

CAS No.

Mol F.

: C43H40N6O3

Mol W.

: 688.82

Cat No.

: SA17718

Impurities, Omeprazole

Omeprazole

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 73590-58-6

Mol F.

: C17H19N3O3S

Mol W.

: 345.4

Cat No.

: SA19400

Impurities, Omeprazole

Omeprazole 4-Desmethyl Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 301669-82-9

Mol F.

: C16H17N3O3S

Mol W.

: 331.4

Cat No.

: SA19419

Impurities, Omeprazole

Omeprazole 4-Hydroxy Sulfide Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 103876-98-8

Mol F.

: C16H17N3O2S

Mol W.

: 315.4

Cat No.

: SA19421

Omeprazole

Omeprazole 5-Methoxy-2-benzimidazolinone Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 2080-75-3

Mol F.

: C8H8N2O2

Mol W.

: 164.2

Cat No.

: SA19418

Impurities, Omeprazole

Omeprazole Bis-Desmethoxy Sulfide Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 704910-94-1

Mol F.

: C15H15N3S

Mol W.

: 269.4

Cat No.

: SA19420

Impurities, Omeprazole

Omeprazole EP Impurity A

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 37052-78-1

Mol F.

: C8H8N2OS

Mol W.

: 180.23

Cat No.

: SA19407

Impurities, Omeprazole

Omeprazole EP Impurity C

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 73590-85-9

Mol F.

: C17H19N3O2S

Mol W.

: 329.42

Cat No.

: SA19409

Omeprazole

Omeprazole EP Impurity D

$99.00 50 mg

In Stock

CAS No.

: 88546-55-8

Mol F.

: C17H19N3O4S

Mol W.

: 361.42

Cat No.

: SA19410

Omeprazole

Omeprazole EP Impurity E

$155.00 100 mg

PLEASE ENQUIRE

CAS No.

: 176219-04-8

Mol F.

: C17H19N3O4S

Mol W.

: 361.42

Cat No.

: SA19411

Omeprazole

Omeprazole EP Impurity F

$1,995.00 100 mg

PLEASE ENQUIRE

CAS No.

: 125656-82-8

Mol F.

: C16H13N3O2S

Mol W.

: 311.36

Cat No.

: SA19412

Omeprazole

Omeprazole EP Impurity G

$1,995.00 100 mg

PLEASE ENQUIRE

CAS No.

: 125656-83-9

Mol F.

: C16H13N3O2S

Mol W.

: 311.36

Cat No.

: SA19413

Omeprazole

Omeprazole EP Impurity I

$175.00 50 mg

In Stock

CAS No.

: 158812-85-2

Mol F.

: C17H19N3O5S

Mol W.

: 377.41

Cat No.

: SA19415

Omeprazole

Omeprazole Hydroxymethyl Impurity

$255.00 1 g

PLEASE ENQUIRE

CAS No.

: 86604-78-6

Mol F.

: C9H13NO2

Mol W.

: 167.2

Cat No.

: SA19402

Omeprazole

Omeprazole Pyridone Acid Impurity | CAS : 1227380-90-6

$1,195.00 200 mg

PLEASE ENQUIRE

CAS No.

: 1227380-90-6

Mol F.

: C16H15N3O4

Mol W.

: 313.31

Cat No.

: SA19416

Impurities, Ondansetron

Ondansetron EP Impurity A

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 153139-56-1

Mol F.

: C16H20N2O

Mol W.

: 256.34

Cat No.

: SA35801

Impurities, Ondansetron

Ondansetron EP Impurity B; Ondansetron Dimer

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1076198-52-1

Mol F.

: C37H38N6O2

Mol W.

: 598.73

Cat No.

: SA35802

Impurities, Ondansetron

Ondansetron EP Impurity C

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 27387-31-1

Mol F.

: C13H13NO

Mol W.

: 199.25

Cat No.

: SA35803

Ondansetron

Ondansetron EP Impurity D

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 99614-64-9

Mol F.

: C14H13NO

Mol W.

: 211.26

Cat No.

: SA35804

Impurities, Ondansetron

Ondansetron EP Impurity E

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 288-32-4

Mol F.

: C3H4N2

Mol W.

: 68.08

Cat No.

: SA35805

Impurities, Ondansetron

Ondansetron EP Impurity F

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 693-98-1

Mol F.

: C4H6N2

Mol W.

: 82.1

Cat No.

: SA35806

Impurities, Ondansetron

Ondansetron EP Impurity G

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 99614-03-6

Mol F.

: C17H17N3O

Mol W.

: 279.33999999999997

Cat No.

: SA35807

Donepezil, Impurities

Open-Ring Hydroxy Acid Donepezil Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C24H31NO5

Mol W.

: 413.51

Cat No.

: SA34318