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

Carvedilol, Impurities

N-Isopropyl Carvedilol

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1246819-01-1

Mol F.

: C₂₇H₃₂N₂O₄

Mol W.

: 448.55

Cat No.

: SA31710

Duloxetine, Impurities

N-Methyl Duloxetine (Racemic)

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 116817-11-9

Mol F.

: C19H21NOS

Mol W.

: 311.44

Cat No.

: SA36323

Impurities, Lenalidomide

N-Methyl Lenalidomide Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 2197421-58-0

Mol F.

: C14H15N3O3

Mol W.

: 273.29000000000002

Cat No.

: SA34103

Impurities, Omeprazole

N-Methyl Omeprazole (Mixture of Isomers)

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 784143-42-6

Mol F.

: C18H21N3O3S

Mol W.

: 359.44

Cat No.

: SA19417

Impurities, Paroxetine

N-Methyl Paroxetine

$99.00 25 mg

PLEASE ENQUIRE

CAS No.

: 110429-36-2

Mol F.

: C20H22FNO3

Mol W.

: 343.4

Cat No.

: SA18316

Pioglitazone

N-Methyl Pioglitazone Impurity | CAS : 1333110-79-4

$995.00 100 mg

PLEASE ENQUIRE

CAS No.

: 1333110-79-4

Mol F.

: C20H22N2O3S

Mol W.

: 370.5

Cat No.

: SA52817

Ganciclovir, Impurities

N-Methyl Valganciclovir Hydrochloride

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1401562-16-0

Mol F.

: C₁₅H₂₄N₆O₅.HCl

Mol W.

: 368.39

Cat No.

: SA13717

Impurities, Varenicline

N-methyl varenicline Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 328055-92-1

Mol F.

: C14H15N3

Mol W.

: 225.29

Cat No.

: SA39510

Impurities, Nitrosamine

N-Methyl-4-Nitro-N-Nitrosoaniline

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 943-41-9

Mol F.

: C7H7N3O3

Mol W.

: 181.15

Cat No.

: SA446148

Impurities, Nitrosamine

N-methyl-N-(2-(methylamino) ethyl)nitrous amide

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 29104-67-4

Mol F.

: C4H11N3O

Mol W.

: 117.15

Cat No.

: SA446154

Impurities, Nitrosamine

N-Methyl-N-(4-oxobutyl)nitrous Amide

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 339362-86-6

Mol F.

: C5H10N2O2

Mol W.

: 130.15

Cat No.

: SA446116

Impurities, Nitrosamine

N-Methyl-N-Nitroso Benzylamine

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 937-40-6

Mol F.

: C8H10N2O

Mol W.

: 150.2

Cat No.

: SA446127

Impurities, Nitrosamine

N-Methyl-N-nitroso-2-propanamine

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 30533-08-5

Mol F.

: C4H10N2O

Mol W.

: 102.14

Cat No.

: SA44645

Impurities, Nitrosamine

N-Methyl-N-Phenethylnitrous Amide

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 13256-11-6

Mol F.

: C9H12N2O

Mol W.

: 164.2

Cat No.

: SA446152

Impurities, Nitrosamine

N-methyl-N-phenylnitrous amide

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 614-00-6

Mol F.

: C7H8N2O

Mol W.

: 136.15

Cat No.

: SA446107

Impurities, Saxagliptin

N-methylcyanamide Saxagliptin carboxylic acid Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C19H25N3O4

Mol W.

: 359.42

Cat No.

: SA27408

Alimemazine, Impurities

N-Nitoso Alimemazine EP Impurity B

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C17H19N3OS

Mol W.

: 313.4

Cat No.

: SA55904

Impurities, Linagliptin, Nitrosamine

N-Nitoso Linagliptin N-Alkyl Dimer Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C51H55N17O5

Mol W.

: 986.09

Cat No.

: SA49954

Impurities, Nitrosamine

N-Nitrosamine piperazine ethanol | CAS :48121-20-6

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 48121-20-6

Mol F.

: C6H13N3O2

Mol W.

: 159.19

Cat No.

: SA446108

Impurities, Nitrosamine, Tranexamic Acid

N-Nitrosamine Tranexamic Acid Dimer

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C16H26N2O5

Mol W.

: 326.39

Cat No.

: SA17409

Cinacalcet, Impurities, Nitrosamine

N-Nitroso 3′-Destrifluoromethyl 2′-Trifluoromethyl Cinacalcet

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C22H21F3N2O

Mol W.

: 386.41

Cat No.

: SA34218

Abemaciclib, Impurities, Nitrosamine

N-Nitroso Abemaciclib

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C27H31F2N9O

Mol W.

: 535.6

Cat No.

: SA53314

Impurities, Nitrosamine

N-Nitroso Acetylcysteine

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C5H8N2O4S

Mol W.

: 192.2

Cat No.

: SA446112

Amlodipine, Impurities, Nitrosamine

N-Nitroso Amlodipine

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C20H24ClN3O6

Mol W.

: 437.88

Cat No.

: SA30518

Amoxicillin, Impurities, Nitrosamine

N-Nitroso Amoxicillin EP Impurity C

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C16H18N4O6S

Mol W.

: 394.4

Cat No.

: SA15322

Amoxicillin, Impurities, Nitrosamine

N-Nitroso Amoxicillin EP Impurity D

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C16H20N4O7S

Mol W.

: 412.4

Cat No.

: SA15321

Amoxicillin, Impurities, Nitrosamine

N-Nitroso Amoxicillin EP Impurity E

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C15H20N4O5S

Mol W.

: 368.4

Cat No.

: SA15303

Apalutamide, Impurities, Nitrosamine

N-Nitroso Apalutamide

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C21H14F4N6O3S

Mol W.

: 506.4

Cat No.

: SA55811

Apalutamide, Impurities, Nitrosamine

N-Nitroso Apalutamide Benzylamine Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C13H13FN4O2

Mol W.

: 276.3

Cat No.

: SA55813

Aripiprazole

N-Nitroso Aripiprazole EP Impurity B

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 2989508-28-1

Mol F.

: C10H11Cl2N3O

Mol W.

: 260.12

Cat No.

: SA24028

Impurities, Nitrosamine

N-Nitroso Arotinolol

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C15H20N4O3S3

Mol W.

: 400.53

Cat No.

: SA44682

Aspartame, Impurities, Nitrosamine

N-Nitroso Aspartame

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C14H17N3O6

Mol W.

: 323.3

Cat No.

: SA56304

Atazanavir, Impurities, Nitrosamine

N-Nitroso Atazanavir EP Impurity C

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C26H42N6O8

Mol W.

: 566.7

Cat No.

: SA56813

Azelastine, Impurities, Nitrosamine

N-Nitroso Azelastine EP Impurity A

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C7H7N3O2

Mol W.

: 165.2

Cat No.

: SA54711

Azelastine, Impurities, Nitrosamine

N-Nitroso Azelastine EP Impurity B

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C14H20N4O2

Mol W.

: 276.3

Cat No.

: SA54710

Impurities, Nitrosamine

N-Nitroso Azelnidipine

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C33H33N5O7

Mol W.

: 611.64

Cat No.

: SA44683

Azithromycin, Impurities, Nitrosamine

N-Nitroso Azithromycin EP Impurity A

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C37H69N3O13

Mol W.

: 763.96

Cat No.

: SA10316

Bendamustine, Impurities, Nitrosamine

N-Nitroso Bendamustine Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C14H17ClN4O3

Mol W.

: 324.77

Cat No.

: SA54410

Benserazide, Impurities, Nitrosamine

N-Nitroso Benserazide

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C10H14N4O6

Mol W.

: 286.2

Cat No.

: SA56604

Benzydamine, Impurities, Nitrosamine

N-Nitroso Benzydamine EP Impurity A

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C19H23N3O3

Mol W.

: 341.4

Cat No.

: SA54608

Impurities, Nitrosamine

N-Nitroso Binimetinib

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C17H14BrF2N5O4

Mol W.

: 470.2

Cat No.

: SA446129

Impurities, Nitrosamine

N-Nitroso Blonanserin Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C21H25FN4O

Mol W.

: 368.5

Cat No.

: SA44667

Impurities, Nitrosamine

N-Nitroso Bromocriptine

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C32H39BrN6O6

Mol W.

: 683.6

Cat No.

: SA44630

Carbamazepine, Impurities, Nitrosamine

N-Nitroso Carbamazepine EP Impurity E

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 7458-08-4

Mol F.

: C14H12N2O

Mol W.

: 224.3

Cat No.

: SA20345

Impurities, Nitrosamine

N-Nitroso Carteolol

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C16H23N3O4

Mol W.

: 321.38

Cat No.

: SA44685

Impurities, Nitrosamine

N-Nitroso Cinacalcet

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 3036581-83-3

Mol F.

: C22H21F3N2O

Mol W.

: 386.41

Cat No.

: SA446118

Cinacalcet, Impurities, Nitrosamine

N-Nitroso Cinacalcet Related Compound C

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C22H21F3N2O

Mol W.

: 386.41

Cat No.

: SA34219

Citalopram, Impurities, Nitrosamine

N-Nitroso Citalopram

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C19H18FN2O2

Mol W.

: 339.37

Cat No.

: SA17024

Clopidogrel, Impurities, Nitrosamine

N-Nitroso Clopidogrel EP Impurity F

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 3033746-15-2

Mol F.

: C15H15ClN2O3S

Mol W.

: 338.8

Cat No.

: SA54008

Impurities, Nitrosamine

N-Nitroso Clopidogrel EP Impurity F

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C15H15ClN2O3S

Mol W.

: 338.8

Cat No.

: SA44619