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

Aciclovir, Impurities

CNP ( 5-chloro-2-nitro diphenylamine)

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 25781-92-4

Mol F.

: C12H9ClN2O2

Mol W.

: 248.67

Cat No.

: SA21402

Cobicistat, Impurities

Cobicisat stage-I enantiomer Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1370406-80-6

Mol F.

: C23H27N3O2S.HCl

Mol W.

: 446.01

Cat No.

: SA48616

Cobicistat, Impurities

Cobicisat stage-II Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C21H34N4O8S

Mol W.

: 502.58

Cat No.

: SA48610

Cobicistat, Impurities

Cobicistat 2-Amino Amide Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1051463-15-0

Mol F.

: C31H41N5O4S

Mol W.

: 579.79999999999995

Cat No.

: SA48609

Cobicistat, Impurities

Cobicistat 4-Carbonyl Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C40H51N7O6S2

Mol W.

: 790

Cat No.

: SA48608

Cobicistat, Impurities

Cobicistat API

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1004316-88-4

Mol F.

: C40H53N7O5S2

Mol W.

: 776.03

Cat No.

: SA48600

Cobicistat, Impurities

Cobicistat Cyclized impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C15H23N3O3S

Mol W.

: 325.43

Cat No.

: SA48613

Cobicistat, Impurities

Cobicistat Dimer Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C28H30N4O4S

Mol W.

: 550.69

Cat No.

: SA48614

Cobicistat, Impurities

Cobicistat Enantiomer Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1004316-77-1 (Free Base)

Mol F.

: C18H26Cl2N2

Mol W.

: 341.32

Cat No.

: SA48601

Cobicistat, Impurities

Cobicistat Hydroxy Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1051463-40-1

Mol F.

: C40H53N7O6S2

Mol W.

: 792

Cat No.

: SA48603

Cobicistat, Impurities

Cobicistat Intermediate A Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1247119-33-0

Mol F.

: C23H27N3O2S.HCl

Mol W.

: 446.01

Cat No.

: SA48615

Cobicistat, Impurities

Cobicistat Morpholine acid Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1004316-92-0

Mol F.

: C17H28N4O4S

Mol W.

: 384.49

Cat No.

: SA48612

Cobicistat, Impurities

Cobicistat MTV-Imidazole Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1247119-46-5

Mol F.

: C12H16N4OS

Mol W.

: 264.35000000000002

Cat No.

: SA48611

Cobicistat, Impurities

Cobicistat RRR Isomer

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1051463-82-1

Mol F.

: C40H53N7O5S2

Mol W.

: 776

Cat No.

: SA48607

Cobicistat, Impurities

Cobicistat SSR Isomer

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C40H53N7O5S2

Mol W.

: 776

Cat No.

: SA48605

Cobicistat, Impurities

Cobicistat SSS Isomer

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 2230789-82-7

Mol F.

: C40H53N7O5S2

Mol W.

: 776

Cat No.

: SA48606

Cobicistat, Impurities

Cobicistat Urea Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1004316-93-1

Mol F.

: C13H19N3O3S

Mol W.

: 297.39999999999998

Cat No.

: SA48604

Colesevelam, Impurities

Colesevelam Trimethylamine Hydrochloride Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 593-81-7

Mol F.

: C3H9N·HCl

Mol W.

: 95.57

Cat No.

: SA10218

Hydrocortisone Valerate, Impurities

Cortisone

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 53-06-5

Mol F.

: C21H28O5

Mol W.

: 360.44

Cat No.

: SA27300

Cyanocobalamin

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 68-19-9

Mol F.

: C63H88CoN14O14P

Mol W.

: 1355.4

Cat No.

: SA55300

Cyclobenzaprine, Impurities

Cyclobenzaprine 3-Hydroxy Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 30235-48-4

Mol F.

: C20H21NO

Mol W.

: 291.39

Cat No.

: SA23107

Cyclobenzaprine, Impurities

Cyclobenzaprine 5-Hydroxy Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 18029-54-4

Mol F.

: C20H23NO

Mol W.

: 293.4

Cat No.

: SA23101

Cyclobenzaprine, Impurities

Cyclobenzaprine Desmethyl Hydrochloride

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 438-59-5

Mol F.

: C19H20ClN

Mol W.

: 297.82

Cat No.

: SA23103

Cyclobenzaprine, Impurities

Cyclobenzaprine Dibenzosuberenone Impurity

$85.00 25 mg

PLEASE ENQUIRE

CAS No.

: 2222-33-5

Mol F.

: C15H10O

Mol W.

: 206.24

Cat No.

: SA23106

Cyclobenzaprine, Impurities

Cyclobenzaprine Didesmethyl

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1614-47-7

Mol F.

: C18H18ClN

Mol W.

: 283.8

Cat No.

: SA23104

Cyclobenzaprine, Impurities

Cyclobenzaprine HCl

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 303-53-7 (Base); 6202-23-9 (HCl)

Mol F.

: C20H22ClN

Mol W.

: 311.85

Cat No.

: SA23102

Cyclobenzaprine, Impurities

Cyclobenzaprine-10,11-epoxide

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 58256-08-9

Mol F.

: C20H21NO

Mol W.

: 291.4

Cat No.

: SA23109

Carbamazepine, Impurities

Cyheptamide

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 7199-29-3

Mol F.

: C16H15NO

Mol W.

: 237.3

Cat No.

: SA20336

Impurities, Permethrin

Cypermethrin

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 52315-07-8

Mol F.

: C22H19Cl2NO3

Mol W.

: 416.3

Cat No.

: SA51911

Cyproheptadine, Impurities

Cyproheptadine 10,11-Dihydro Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 21081-07-2

Mol F.

: C21H23N

Mol W.

: 289.4

Cat No.

: SA53806

Cyproheptadine, Impurities

Cyproheptadine Despiperidine Methyl Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 24167-43-9

Mol F.

: C16H16

Mol W.

: 208.3

Cat No.

: SA53808

Cyproheptadine, Impurities

Cyproheptadine Despiperidine Propylidene Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C18H16

Mol W.

: 232.3

Cat No.

: SA53807

Cyproheptadine, Impurities

Cyproheptadine Diol Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C21H23NO2

Mol W.

: 321.42

Cat No.

: SA53810

Cyproheptadine, Impurities

Cyproheptadine EP Impurity A

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 256-81-5

Mol F.

: C15H12

Mol W.

: 192.3

Cat No.

: SA53801

Cyproheptadine, Impurities

Cyproheptadine EP impurity B

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 2222-33-5

Mol F.

: C15H10O

Mol W.

: 206.2

Cat No.

: SA53802

Cyproheptadine, Impurities

Cyproheptadine EP impurity C

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 3967-32-6

Mol F.

: C21H23NO

Mol W.

: 305.4

Cat No.

: SA53803

Cyproheptadine, Impurities

Cyproheptadine Epoxide Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 54191-04-7

Mol F.

: C21H21NO

Mol W.

: 303.41

Cat No.

: SA53809

Cyproheptadine, Impurities

Cyproheptadine N-Oxide Mixture

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 100295-63-4

Mol F.

: C21H21NO

Mol W.

: 303.4

Cat No.

: SA53804

Impurities, Molnupiravir

Cytidine-4-amino analogue impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C9H13N3O5

Mol W.

: 243.22

Cat No.

: SA46209

Impurities, Molnupiravir

Cytidine-N3-analogue impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1195711-14-8

Mol F.

: C9H13N3O5

Mol W.

: 243.22

Cat No.

: SA46210

Impurities, Topiramate

D-Fructopiranose Hydrochloride

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 32785-90-3

Mol F.

: C12H19ClO5

Mol W.

: 278.73

Cat No.

: SA45510

Emtricitabine, Impurities

D-Isomenthol Emtricitanibe Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 23283-97-8

Mol F.

: C10H20O

Mol W.

: 156.3

Cat No.

: SA22931

Ganciclovir, Impurities

D-Valganciclovir Hydrochloride

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1393911-57-3

Mol F.

: C₁₄H₂₃ClN₆O₅

Mol W.

: 390.82

Cat No.

: SA13715

Dacarbazine, Impurities

Dacarbazine

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 4342-03-4

Mol F.

: C6H10N6O

Mol W.

: 182.18

Cat No.

: SA38800

Dacarbazine, Impurities

Dacarbazine EP Impurity B

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 360-97-4

Mol F.

: C4H6N4O

Mol W.

: 126.12

Cat No.

: SA38802

Dacarbazine, Impurities

Dacarbazine EP Impurity C

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1314929-56-0

Mol F.

: C4H5N5O

Mol W.

: 139.12

Cat No.

: SA38803

Dacarbazine, Impurities

Dacarbazine EP Impurity D

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 124-40-3 (Free base); 506-59-2 (HCl Salt)

Mol F.

: C2H7N

Mol W.

: 45.08

Cat No.

: SA38804

Ethisterone, Impurities

Danazol

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 17230-88-5

Mol F.

: C₂₂H₂₇NO₂

Mol W.

: 337.46

Cat No.

: SA12907

Dapagliflozin, Impurities

Dapagliflozin

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 461432-26-8

Mol F.

: C21H25ClO6

Mol W.

: 408.87

Cat No.

: SA15002

Dapagliflozin

Dapagliflozin 1,4-Butanediol Dimer

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C42H48Cl2O12

Mol W.

: 815.7

Cat No.

: SA15086