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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, Pregabalin

rac-4-Methyl-pregabalin

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CAS No.

: 313651-23-9

Mol F.

: C9H19NO2

Mol W.

: 173.25

Cat No.

: SA24816

Bromhexine, Impurities

rac-cis-Ambroxol

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CAS No.

: 107814-37-9

Mol F.

: C13H18Br2N2O

Mol W.

: 378.10

Cat No.

: SA28407

Dorzolamide, Impurities

rac-Dorzolamide

$255.00 25 mg

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CAS No.

: 120280-13-9

Mol F.

: C10H16N2O4S3

Mol W.

: 324.44

Cat No.

: SA24117

Impurities, Praziquantel

rac-Praziquanamine

$120.00 25 mg

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CAS No.

: 61196-37-0

Mol F.

: C12H14N2O

Mol W.

: 202.25

Cat No.

: SA13907

Impurities, Pregabalin

rac-Pregabalin N-Acrylamide

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CAS No.

: 1495844-28-4

Mol F.

: C11H19NO3

Mol W.

: 213.27

Cat No.

: SA24819

Dorzolamide, Impurities

rac-trans Dorzolamide Hydrochloride

$255.00 25 mg

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CAS No.

: 120279-36-9

Mol F.

: C10H17ClN2O4S3

Mol W.

: 360.9

Cat No.

: SA24119

Impurities, Pitavastatin

Racemic pitvastatin

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CAS No.

: NA

Mol F.

: C25H23FNO4- .1/2Ca+2

Mol W.

: 420.45. 20

Cat No.

: SA29521

Impurities, Raloxifene

Raloxifene 4-Monomethyl Ether

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CAS No.

: 185415-07-0

Mol F.

: C29H299NO4S

Mol W.

: 487.61

Cat No.

: SA24904

Impurities, Raloxifene

Raloxifene 6-Monomethyl Ether; 6-methoxy benzothiophene impurity

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CAS No.

: 178451-13-3

Mol F.

: C29H299NO4S

Mol W.

: 487.61

Cat No.

: SA24903

Impurities, Raloxifene

Raloxifene Benzoic Acid Impurity

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CAS No.

: 84449-80-9

Mol F.

: C14H20ClNO3

Mol W.

: 285.77

Cat No.

: SA24920

Impurities, Raloxifene

Raloxifene Dimer

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CAS No.

: 618902-12-8

Mol F.

: C56H52N2O8S2

Mol W.

: 945.15

Cat No.

: SA24905

Impurities, Raltegravir

Raltegravir (E/Z Mixture)-ethoxyacethydrazone

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CAS No.

: NA

Mol F.

: C22H27FN6O6

Mol W.

: 490.48

Cat No.

: SA25618

Impurities, Raltegravir

Raltegravir EP Impurity A

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CAS No.

: 518048-03-8

Mol F.

: C16H19FN4O3

Mol W.

: 334.35

Cat No.

: SA25600

Impurities, Raltegravir

Raltegravir EP Impurity B

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CAS No.

: 1193687-85-2

Mol F.

: C19H24FN5O3

Mol W.

: 389.42

Cat No.

: SA25601

Impurities, Raltegravir

Raltegravir EP Impurity C

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CAS No.

: 1391918-17-4

Mol F.

: C20H23FN6O6

Mol W.

: 462.44

Cat No.

: SA25602

Impurities, Raltegravir

Raltegravir EP Impurity D

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CAS No.

: 1064706-98-4

Mol F.

: C18H19FN4O6

Mol W.

: 406.37

Cat No.

: SA25603

Impurities, Raltegravir

Raltegravir EP Impurity E

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CAS No.

: 1193687-87-4

Mol F.

: C20H22N6O5

Mol W.

: 426.43

Cat No.

: SA25604

Impurities, Raltegravir

Raltegravir EP Impurity F

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CAS No.

: 2138805-56-6(Z/E)

Mol F.

: C22H27FN6O6

Mol W.

: 490.48

Cat No.

: SA25605

Impurities, Raltegravir

Raltegravir EP Impurity G

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CAS No.

: NA

Mol F.

: C22H27FN6O6

Mol W.

: 490.48

Cat No.

: SA25606

Impurities, Raltegravir

Raltegravir EP Impurity H

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CAS No.

: 1391918-18-5

Mol F.

: C34H36F2N8O8

Mol W.

: 722.69

Cat No.

: SA25607

Impurities, Raltegravir

Raltegravir Impurity SA25612

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CAS No.

: 1159977-42-0

Mol F.

: C18H21N3O6

Mol W.

: 375.38

Cat No.

: SA25612

Impurities, Raltegravir

Raltegravir Impurity SA25614

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CAS No.

: 519032-08-7

Mol F.

: C17H19N3O6

Mol W.

: 361.35

Cat No.

: SA25614

Impurities, Raltegravir

Raltegravir Impurity SA25615

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CAS No.

: 888504-27-6

Mol F.

: C18H21N3O6

Mol W.

: 375.38

Cat No.

: SA25615

Impurities, Raltegravir

Raltegravir Impurity SA25617

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CAS No.

: 1172131-64-4

Mol F.

: C21H27FN4O4

Mol W.

: 418.46

Cat No.

: SA25617

Impurities, Ramipril

Ramipril

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CAS No.

: 87333-19-5

Mol F.

: C23H32N2O5

Mol W.

: 416.51

Cat No.

: SA31300

Impurities, Ramipril

Ramipril Bicyclic Acid

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CAS No.

: 80875-98-5

Mol F.

: C8H13NO2

Mol W.

: 155.19

Cat No.

: SA31316

Impurities, Ramipril

Ramipril Bicyclic Acid Benzyl Ester (HCl Salt)

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CAS No.

: 87269-87-2

Mol F.

: C15H20ClNO2

Mol W.

: 281.78

Cat No.

: SA31317

Impurities, Ramipril

Ramipril EP Impurity A

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CAS No.

: 108313-11-7

Mol F.

: C22H30N2O5

Mol W.

: 402.48

Cat No.

: SA31301

Impurities, Ramipril

Ramipril EP Impurity B

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CAS No.

: 295328-72-2

Mol F.

: C24H34N2O5

Mol W.

: 430.54

Cat No.

: SA31302

Impurities, Ramipril

Ramipril EP Impurity C

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CAS No.

: 99742-35-5

Mol F.

: C23H39ClN2O5

Mol W.

: 459.02

Cat No.

: SA31303

Impurities, Ramipril

Ramipril EP Impurity D

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CAS No.

: 108731-95-9

Mol F.

: C23H30N2O4

Mol W.

: 398.5

Cat No.

: SA31304

Impurities, Ramipril

Ramipril EP Impurity E

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CAS No.

: 87269-97-4

Mol F.

: C21H28N2O5

Mol W.

: 388.46

Cat No.

: SA31305

Impurities, Ramipril

Ramipril EP Impurity F

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CAS No.

: 82717-96-2

Mol F.

: C15H21NO4

Mol W.

: 279.33

Cat No.

: SA31306

Impurities, Ramipril

Ramipril EP Impurity G

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CAS No.

: 108-88-3

Mol F.

: C₇H₈

Mol W.

: 92.14

Cat No.

: SA31307

Impurities, Ramipril

Ramipril EP Impurity H

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CAS No.

: 104195-90-6

Mol F.

: C23H32N2O5

Mol W.

: 416.51

Cat No.

: SA31308

Impurities, Ramipril

Ramipril EP Impurity I

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CAS No.

: 129939-65-7

Mol F.

: C23H32N2O5

Mol W.

: 416.51

Cat No.

: SA31309

Impurities, Ramipril

Ramipril EP Impurity J

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CAS No.

: 1246253-05-3

Mol F.

: C23H32N2O5

Mol W.

: 416.51

Cat No.

: SA31310

Impurities, Ramipril

Ramipril EP Impurity K

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CAS No.

: 108736-10-3

Mol F.

: C21H26N2O4

Mol W.

: 370.44

Cat No.

: SA31311

Impurities, Ramipril

Ramipril EP Impurity L

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CAS No.

: 1309040-96-7

Mol F.

: C23H30N2O5

Mol W.

: 414.49

Cat No.

: SA31312

Impurities, Ramipril

Ramipril EP Impurity M

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CAS No.

: 2743-38-6

Mol F.

: C18H14O8

Mol W.

: 358.3

Cat No.

: SA31313

Impurities, Ramipril

Ramipril EP Impurity N

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CAS No.

: 129939-63-5

Mol F.

: C₂₃H₃₂N₂O₅

Mol W.

: 416.51

Cat No.

: SA31314

Impurities, Ramipril

Ramipril EP Impurity O

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CAS No.

: NA

Mol F.

: C30H38N2O6

Mol W.

: 522.63

Cat No.

: SA31315

Impurities, Ranitidine

Ranitidine

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CAS No.

: 66357-35-5(base);66357-59-3(HClsalt)

Mol F.

: C13H23ClN4O3S

Mol W.

: 350.86

Cat No.

: SA26500

Impurities, Ranitidine

Ranitidine EP Impurity J

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CAS No.

: 1331637-48-9

Mol F.

: C11H22N6O4S2

Mol W.

: 366.46

Cat No.

: SA26510

Impurities, Ranitidine

Ranitidine N,S-Dioxide

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CAS No.

: 1185237-42-6

Mol F.

: C13H22N4O5S

Mol W.

: 346.4

Cat No.

: SA26515

Impurities, Ranitidine

Ranitidine Nitroso Impurity 2

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CAS No.

: 185847-75-0

Mol F.

: C13H20N6O5S

Mol W.

: 372.4

Cat No.

: SA26522

Impurities, Ranolazine

Ranolazine

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CAS No.

: 95635-55-5(base);95635-56-6(dihydrochloridesalt)

Mol F.

: C24H33N3O4

Mol W.

: 427.54

Cat No.

: SA26800

Impurities, Ranolazine

Ranolazine Bis-N-Oxide

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CAS No.

: 1246816-00-1

Mol F.

: C24H33N3O6

Mol W.

: 459.54

Cat No.

: SA26801

Impurities, Ranolazine

Ranolazine N-Desacetamido Impurity

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CAS No.

: 162712-35-8

Mol F.

: C14H22N2O3

Mol W.

: 266.33999999999997

Cat No.

: SA26802

Impurities, Ranolazine

Ranolazine O-Desaryl Impurity

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CAS No.

: 172430-46-5

Mol F.

: C17H27N3O3

Mol W.

: 321.41000000000003

Cat No.

: SA26803