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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, Nitrosamine

N-Nitroso Azelnidipine

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CAS No.

Mol F.

: C33H33N5O7

Mol W.

: 611.64

Cat No.

: SA44683

Azithromycin, Impurities, Nitrosamine

N-Nitroso Azithromycin EP Impurity A

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CAS No.

: NA

Mol F.

: C37H69N3O13

Mol W.

: 763.96

Cat No.

: SA10316

Bendamustine, Impurities, Nitrosamine

N-Nitroso Bendamustine Impurity

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CAS No.

: NA

Mol F.

: C14H17ClN4O3

Mol W.

: 324.77

Cat No.

: SA54410

Benserazide, Impurities, Nitrosamine

N-Nitroso Benserazide

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CAS No.

: NA

Mol F.

: C10H14N4O6

Mol W.

: 286.2

Cat No.

: SA56604

Benzydamine, Impurities, Nitrosamine

N-Nitroso Benzydamine EP Impurity A

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CAS No.

: NA

Mol F.

: C19H23N3O3

Mol W.

: 341.4

Cat No.

: SA54608

Impurities, Nitrosamine

N-Nitroso Binimetinib

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CAS No.

: NA

Mol F.

: C17H14BrF2N5O4

Mol W.

: 470.2

Cat No.

: SA446129

Impurities, Nitrosamine

N-Nitroso Blonanserin Impurity

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CAS No.

Mol F.

: C21H25FN4O

Mol W.

: 368.5

Cat No.

: SA44667

Impurities, Nitrosamine

N-Nitroso Bromocriptine

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CAS No.

: NA

Mol F.

: C32H39BrN6O6

Mol W.

: 683.6

Cat No.

: SA44630

Carbamazepine, Impurities, Nitrosamine

N-Nitroso Carbamazepine EP Impurity E

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CAS No.

: 7458-08-4

Mol F.

: C14H12N2O

Mol W.

: 224.3

Cat No.

: SA20345

Impurities, Nitrosamine

N-Nitroso Carteolol

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CAS No.

Mol F.

: C16H23N3O4

Mol W.

: 321.38

Cat No.

: SA44685

Impurities, Nitrosamine

N-Nitroso Cinacalcet

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CAS No.

: 3036581-83-3

Mol F.

: C22H21F3N2O

Mol W.

: 386.41

Cat No.

: SA446118

Cinacalcet, Impurities, Nitrosamine

N-Nitroso Cinacalcet Related Compound C

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CAS No.

: NA

Mol F.

: C22H21F3N2O

Mol W.

: 386.41

Cat No.

: SA34219

Citalopram, Impurities, Nitrosamine

N-Nitroso Citalopram

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CAS No.

Mol F.

: C19H18FN2O2

Mol W.

: 339.37

Cat No.

: SA17024

Impurities, Nitrosamine

N-Nitroso Clopidogrel EP Impurity F

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CAS No.

: NA

Mol F.

: C15H15ClN2O3S

Mol W.

: 338.8

Cat No.

: SA44619

Clopidogrel, Impurities, Nitrosamine

N-Nitroso Clopidogrel EP Impurity F

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CAS No.

: 3033746-15-2

Mol F.

: C15H15ClN2O3S

Mol W.

: 338.8

Cat No.

: SA54008

Clozapine, Impurities, Nitrosamine

N-Nitroso Clozapine

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CAS No.

: 156632-03-0

Mol F.

: C18H18ClN5O

Mol W.

: 355.8

Cat No.

: SA446156

Impurities, Nitrosamine

N-Nitroso Cyclophosphamide

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CAS No.

Mol F.

: C7H14Cl2N3O3P

Mol W.

: 290.08

Cat No.

: SA446102

Impurities, Nitrosamine

N-Nitroso Cytarabine Impurity B

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CAS No.

: NA

Mol F.

: C9H11N3O7

Mol W.

: 273.2

Cat No.

: SA446157

Impurities, Nitrosamine

N-Nitroso Cytarabine Impurity C

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CAS No.

: NA

Mol F.

: C4H4N4O2

Mol W.

: 140.1

Cat No.

: SA446158

Impurities, Nitrosamine

N-Nitroso dabigatran Impurity

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CAS No.

Mol F.

: C34H40N8O6

Mol W.

: 656.73

Cat No.

: SA44655

Colesevelam, Impurities, Nitrosamine

N-Nitroso Decyl Aminoquat

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CAS No.

: NA

Mol F.

: C19H42BrN3O

Mol W.

: 408.46

Cat No.

: SA10219

Impurities, Nitrosamine

N-Nitroso Desipramine

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CAS No.

: 57164-17-7

Mol F.

: C18H21N3O

Mol W.

: 295.4

Cat No.

: SA446133

Desloratadine, Impurities, Nitrosamine

N-Nitroso Desloratadine

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CAS No.

: 1246819-22-6

Mol F.

: C19H18ClN3O

Mol W.

: 339.82

Cat No.

: SA44635

Alcaftadine, Impurities, Nitrosamine

N-Nitroso Desmethyl Alcaftadine

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CAS No.

: NA

Mol F.

: C18H18N4O2

Mol W.

: 322.37

Cat No.

: SA31008

Azelastine, Impurities, Nitrosamine

N-Nitroso Desmethyl Azelastine

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CAS No.

: NA

Mol F.

: C21H21ClN4O2

Mol W.

: 396.9

Cat No.

: SA54712

Bedaquiline, Impurities, Nitrosamine

N-Nitroso Desmethyl Bedaquiline

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CAS No.

: NA

Mol F.

: C31H28BrN3O3

Mol W.

: 570.5

Cat No.

: SA56905

Chlorpheniramine, Impurities, Nitrosamine

N-Nitroso Desmethyl Chlorpheniramine Impurity

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CAS No.

: 3036581-84-4

Mol F.

: C15H16ClN3O

Mol W.

: 289.8

Cat No.

: SA446113

Chlorpromazine, Nitrosamine

N-Nitroso Desmethyl Chlorpromazine

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CAS No.

: 55855-44-2

Mol F.

: C16H16ClN3OS

Mol W.

: 333.83

Cat No.

: SA21620

Clomipramine, Nitrosamine

N-Nitroso Desmethyl Clomipramine

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CAS No.

: NA

Mol F.

: C18H20ClN3O

Mol W.

: 329.82

Cat No.

: SA33709

Impurities, Nitrosamine

N-Nitroso Desmethyl Clozapine Impurity

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CAS No.

: NA

Mol F.

: C17H16ClN5O

Mol W.

: 341.79

Cat No.

: SA446135

Impurities, Nitrosamine

N-Nitroso Desmethyl Diphenhydramine

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CAS No.

: 55855-43-1

Mol F.

: C16H18N2O2

Mol W.

: 270.3

Cat No.

: SA446134

Imatinib

N-Nitroso Desmethyl Imatinib

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In Stock

CAS No.

: 2816369-80-7

Mol F.

: C28H28N8O2

Mol W.

: 508.6

Cat No.

: SA22217

Impurities, Nitrosamine, Ranitidine

N-Nitroso Desmethyl Ranitidine

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CAS No.

Mol F.

: C12H19N5O4S

Mol W.

: 329.38

Cat No.

: SA26519

Impurities, Nitrosamine, Verapamil

N-Nitroso Desmethyl S-Verapamil

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CAS No.

: NA

Mol F.

: C26H35N3O5

Mol W.

: 469.57

Cat No.

: SA32917

Impurities, Nitrosamine, Tetracaine

N-Nitroso Desmethyl Tetracaine | CAS : 3050754-69-0

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CAS No.

: 3050754-69-0

Mol F.

: C14H21N3O3

Mol W.

: 279.3

Cat No.

: SA446110

Impurities, Nitrosamine, Ropinirole

N-Nitroso Despropyl Ropinirole

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CAS No.

Mol F.

: C13H17N3O2

Mol W.

: 247.29

Cat No.

: SA41217

Diazepam, Impurities, Nitrosamine

N-Nitroso Diazepam EP Impurity D

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CAS No.

: 51145-18-7

Mol F.

: C14H11ClN2O2

Mol W.

: 274.7

Cat No.

: SA20509

Diclofenac, Impurities, Nitrosamine

N-Nitroso Diclofenac

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CAS No.

: 66505-80-4

Mol F.

: C14H10Cl2N2O3

Mol W.

: 325.1

Cat No.

: SA12716

Colesevelam, Impurities

N-Nitroso Dihexyl Aminoquat Dibromide

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CAS No.

: NA

Mol F.

: C18H42N4O2 : 2(Br)

Mol W.

: 330.6 : 2(79.9)

Cat No.

: SA10220

Diltiazem, Impurities, Nitrosamine

N-NITROSO DILTIAZEM EP IMPURITY G

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CAS No.

: NA

Mol F.

: C19H21N3O4S

Mol W.

: 387.45

Cat No.

: SA19533

Domperidone, Impurities, Nitrosamine

N-Nitroso Domperidone EP Impurity A

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CAS No.

: NA

Mol F.

: C12H13ClN4O2

Mol W.

: 280.7

Cat No.

: SA57407

Duloxetine, Impurities, Nitrosamine

N-Nitroso Duloxetin EP Impurity C

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CAS No.

Mol F.

: C18H18N2O2S

Mol W.

: 326.41

Cat No.

: SA36318

Duloxetine, Impurities, Nitrosamine

N-Nitroso Duloxetin EP Impurity E

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CAS No.

Mol F.

: C18H18N2O2S

Mol W.

: 326.41

Cat No.

: SA36319

Duloxetine, Impurities, Nitrosamine

N-Nitroso Duloxetin EP Impurity F

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CAS No.

Mol F.

: C18H18N2O2S

Mol W.

: 326.41

Cat No.

: SA36320

Impurities, Nitrosamine

N-Nitroso Ebastine

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CAS No.

: NA

Mol F.

: C18H20N2O2

Mol W.

: 296.36

Cat No.

: SA44631

Eltrombopag, Impurities, Nitrosamine

N-Nitroso Eltrombopag

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CAS No.

Mol F.

: C25H21N5O5

Mol W.

: 471.46

Cat No.

: SA51104

Ensartinib, Impurities, Nitrosamine

N-Nitroso Ensartinib Impurity

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CAS No.

: NA

Mol F.

: C26H26Cl2FN7O4

Mol W.

: 590.4

Cat No.

: SA53603

Impurities, Nitrosamine

N-Nitroso Enzalutamide Cyanoamide Impurity

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CAS No.

: NA

Mol F.

: C12H13FN4O2

Mol W.

: 264.3

Cat No.

: SA446159

Eslicarbazepine, Impurities, Nitrosamine

N-Nitroso Eslicarbazepine

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CAS No.

Mol F.

: C14H12N2O2

Mol W.

: 240.26

Cat No.

: SA28810

Ezetimibe, Impurities, Nitrosamine

N-Nitroso Ezetimibe

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CAS No.

Mol F.

: C33H29F2N3O6

Mol W.

: 601.6

Cat No.

: SA14855