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, Vericiguat

Dimethyl 6-amino-2-(5-fluoro-1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridin-3-yl)pyrimidine-4,5-diyldicarbamate

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C21H18F2N8O4

Mol W.

: 484.42

Cat No.

: SA50712

Impurities, Omeprazole

Dimethyl Sulfate

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 77-78-1

Mol F.

: C2H6O4S

Mol W.

: 126.13

Cat No.

: SA19403

Fingolimod, Impurities

Dimethylamino Fingolimod Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1404433-87-9

Mol F.

: C21H38ClNO2

Mol W.

: 371.98

Cat No.

: SA34513

Impurities, Tolterodine

Diol acetate tolterodine impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 2514856-06-3

Mol F.

: C18H20O3

Mol W.

: 284.35000000000002

Cat No.

: SA28212

Diphenhydramine, Impurities

Diphenhydramine

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 147-24-0(HCl); 58-73-1(Base)

Mol F.

: C17H22ClNO

Mol W.

: 291.82

Cat No.

: SA19801

Diphenhydramine, Impurities

Diphenhydramine Related Compoud A

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 53499-40-4(HCl); 17471-10-2(Base)

Mol F.

: C16H19NO.HCl

Mol W.

: 277.79

Cat No.

: SA19802

Dipyridamole, Impurities

Dipyridamole

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 58-32-2

Mol F.

: C24H40N8O4

Mol W.

: 504.63

Cat No.

: SA38900

Dipyridamole, Impurities

Dipyridamole EP Impurity A

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 16982-40-4

Mol F.

: C‚…H„€NˆO‚

Mol W.

: 484.64

Cat No.

: SA38901

Dipyridamole, Impurities

Dipyridamole EP Impurity B

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 16908-47-7

Mol F.

: C‚ƒH„€NˆO†

Mol W.

: 524.61

Cat No.

: SA38902

Dipyridamole, Impurities

Dipyridamole EP Impurity C

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 54093-92-4

Mol F.

: C‚€Hƒ€ClN‡O‚

Mol W.

: 435.95

Cat No.

: SA38903

Dipyridamole, Impurities

Dipyridamole EP Impurity D

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1176886-12-6

Mol F.

: C22H36N8O3

Mol W.

: 460.57

Cat No.

: SA38904

Dipyridamole, Impurities

Dipyridamole EP Impurity E

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 2365420-11-5

Mol F.

: C24H40N8O4

Mol W.

: 504.63

Cat No.

: SA38905

Dipyridamole, Impurities

Dipyridamole EP Impurity F

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 60286-30-8

Mol F.

: C21H36N8O5

Mol W.

: 480.56

Cat No.

: SA38906

Dipyridamole, Impurities

Dipyridamole EP Impurity G

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1913545

Mol F.

: C16H20N2O

Mol W.

: 367.27

Cat No.

: SA38907

Dolutegravir, Impurities

Dolutegravir O-Methyl 12-Epi Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C21H21F2N3O5

Mol W.

: 433.41

Cat No.

: SA20204

Dolutegravir, Impurities

Dolutegravir O-Methyl Enantiomer Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C21H21F2N3O5

Mol W.

: 433.41

Cat No.

: SA20205

Dolutegravir, Impurities

Dolutegravir RR Isomer

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1357289-29-2

Mol F.

: C20H19F2N3O5

Mol W.

: 419.38

Cat No.

: SA20207

Dolutegravir, Impurities

Dolutegravir Sodium Salt

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1051375-19-9

Mol F.

: C20H18F2N3NaO5

Mol W.

: 441.36

Cat No.

: SA20206

Dolutegravir, Impurities

Dolutegravir SR Isomer

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1309560-49-3

Mol F.

: C20H19F2N3O5

Mol W.

: 419.38

Cat No.

: SA20208

Donepezil, Impurities

Donepezil

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 120014-06-4

Mol F.

: C₂₄H₂₉NO₃

Mol W.

: 379.49

Cat No.

: SA34302

Dorzolamide, Impurities

Dorzolamide EP Impurity A

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 120279-95-0 (base); 122028-36-8 (HCl salt)

Mol F.

: C10H16N2O4S3

Mol W.

: 324.44

Cat No.

: SA24116

Dorzolamide, Impurities

Dorzolamide EP Impurity C

$695.00 25 mg

PLEASE ENQUIRE

CAS No.

Mol F.

: C10H17BN2O6S3

Mol W.

: 368.26

Cat No.

: SA24103

Dorzolamide, Impurities

Dorzolamide Hydrochloride

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 130693-82-2

Mol F.

: C10H17ClN2O4S3

Mol W.

: 360.9

Cat No.

: SA24105

Dorzolamide, Impurities

Dorzolamide N-Sulfonamide Dimer

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 199734-72-0

Mol F.

: C20H29N2O8S6

Mol W.

: 631.85

Cat No.

: SA24118

Impurities, Prazosin

Doxazosin EP Impurity D

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 28888-44-0

Mol F.

: C10H10N2O4

Mol W.

: 222.2

Cat No.

: SA24205

Doxepin, Impurities

Doxepin

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1229-29-4

Mol F.

: C19H21NO

Mol W.

: 279.38

Cat No.

: SA29900

Doxepin, Impurities

Doxepin EP Impurity A

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 4504-87-4

Mol F.

: C14H10O2

Mol W.

: 210.23

Cat No.

: SA29901

Doxepin, Impurities

Doxepin EP Impurity B

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 4504-88-5

Mol F.

: C19H23NO2

Mol W.

: 297.39

Cat No.

: SA29902

Doxepin, Impurities

Doxepin EP Impurity D

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 25127-31-5

Mol F.

: C19H21NO

Mol W.

: 279.38

Cat No.

: SA29904

Doxepin, Impurities

Doxepin N-Desmethyl N-Acetyl Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 250331-54-5

Mol F.

: C20H21NO2

Mol W.

: 307.39

Cat No.

: SA29906

Doxepin, Impurities

Doxepin N-Oxide

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 22684-91-9

Mol F.

: C19H21NO2

Mol W.

: 295.37

Cat No.

: SA29907

DROSPIRENONE, Impurities

Drospirenone | CAS : 67392-87-4

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 67392-87-4

Mol F.

: C24H30O3

Mol W.

: 366.49

Cat No.

: SA53000

Duloxetine, Impurities

Duloxetine 2-Naphthalenol Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1346599-09-4

Mol F.

: C18H19NOS

Mol W.

: 297.42

Cat No.

: SA36315

Duloxetine, Impurities

Duloxetine Methylaminopropanol Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 116539-56-1

Mol F.

: C8H13NOS

Mol W.

: 171.26

Cat No.

: SA36312

Duloxetine, Impurities

Duloxetine N-Desmethyl

$550.00 25 mg

PLEASE ENQUIRE

CAS No.

: 178273-35-3(base);1798887-69-0(Oxalate)

Mol F.

: C17H17NOS

Mol W.

: 283.39

Cat No.

: SA36310

Duloxetine, Impurities

Duloxetine N-Desmethyl (R)-Isomer

$450.00 25 mg

PLEASE ENQUIRE

CAS No.

: 1193213-97-6(base)

Mol F.

: C17H17NOS

Mol W.

: 283.39

Cat No.

: SA36314

Duloxetine, Impurities

Duloxetine phthalimide | CAS : 199191-67-8

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 199191-67-8

Mol F.

: C26H23NO4S

Mol W.

: 445.53

Cat No.

: SA36321

Dutasteride, Impurities

Dutasteride

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 164656-23-9

Mol F.

: C27H30F6N2O2

Mol W.

: 528.53

Cat No.

: SA35200

Dutasteride, Impurities

Dutasteride 17-Epimer; Dutasteride EP Impurity E

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1796930-46-5

Mol F.

: C27H30F6N2O2

Mol W.

: 528.53

Cat No.

: SA35205

Dutasteride, Impurities

Dutasteride EP Impurity B

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 2512195-98-9

Mol F.

: C21H32N2O2

Mol W.

: 344.49

Cat No.

: SA35202

Dutasteride, Impurities

Dutasteride EP Impurity D

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C27H28F6N2O2

Mol W.

: 526.51

Cat No.

: SA35204

Dutasteride, Impurities

Dutasteride EP Impurity G

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1430804-85-5

Mol F.

: C27H28F6N2O2

Mol W.

: 526.51

Cat No.

: SA35207

Dutasteride, Impurities

Dutasteride EP Impurity H; Dutasteride α-Dimer

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1648593-70-7

Mol F.

: C46H55F6N3O4

Mol W.

: 827.94

Cat No.

: SA35208

Dutasteride, Impurities

Dutasteride EP Impurity I; Dutasteride β-Dimer

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1648593-70-7

Mol F.

: C46H55F6N3O4

Mol W.

: 827.94

Cat No.

: SA35209

Impurities, Norgestimate

E-17-Deacetylnorgestimate

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 74183-55-4

Mol F.

: C21H29NO2

Mol W.

: 327.46

Cat No.

: SA15902

Edoxaban, Impurities

Edoxaban chloro impurity 2

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 4755-77-5

Mol F.

: C4H5ClO3

Mol W.

: 136.53

Cat No.

: SA33015

Edoxaban, Impurities

Edoxaban Dichloro Dipyridine Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C12H10Cl4N4O2

Mol W.

: 384.05

Cat No.

: SA33029

Edoxaban, Impurities

Edoxaban Impurity B

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C24H30ClN7O5S

Mol W.

: 564.07

Cat No.

: SA33026

Edoxaban, Impurities

Edoxaban Impurity C

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 480452-37-7

Mol F.

: C16H22ClN5O3

Mol W.

: 367.83

Cat No.

: SA33025

Edoxaban, Impurities, Nitrosamine

Edoxaban N-Nitroso Piperidinyl Carboxylic Acid Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C7H7N3O3S

Mol W.

: 213.21

Cat No.

: SA33054