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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, Raloxifene

Raloxifene Bismethyl Ether

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In Stock

CAS No.

: 84541-38-8

Mol F.

: C30H31NO4S

Mol W.

: 501.64

Cat No.

: SA24902

Impurities, Raloxifene

Raloxifene Des(piperidineethyl) Impurity

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CAS No.

: 177744-96-6

Mol F.

: C21H14O4S

Mol W.

: 362.4

Cat No.

: SA24921

Impurities, Raloxifene

Raloxifene Diethoxy Impurity

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CAS No.

Mol F.

: C32H35NO4S

Mol W.

: 529.69

Cat No.

: SA24922

Impurities, Raloxifene

Raloxifene Dimesylate Hydrochloride

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CAS No.

: 84449-85-4

Mol F.

: C30H31NO8S3.HCl

Mol W.

: 666.22

Cat No.

: SA24906

Impurities, Raloxifene

Raloxifene Hydrochloride

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CAS No.

: 82640-04-8

Mol F.

: C28H28ClNO4S

Mol W.

: 510.04

Cat No.

: SA24901

Impurities, Ranitidine

Ranitidine EP Impurity A

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In Stock

CAS No.

: 72126-78-4

Mol F.

: C22H35N5O4S2

Mol W.

: 497.67

Cat No.

: SA26501

Impurities, Ranitidine

Ranitidine EP Impurity B

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CAS No.

: 66356-53-4

Mol F.

: C10H18N2OS

Mol W.

: 214.33

Cat No.

: SA26502

Impurities, Ranitidine

Ranitidine EP Impurity C

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CAS No.

: 73851-70-4

Mol F.

: C13H22N4O4S

Mol W.

: 330.4

Cat No.

: SA26503

Impurities, Ranitidine

Ranitidine EP Impurity D

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CAS No.

: 117846-02-3

Mol F.

: C12H19N3O4S

Mol W.

: 301.36

Cat No.

: SA26504

Impurities, Ranitidine

Ranitidine EP Impurity E

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CAS No.

: 73857-20-2

Mol F.

: C13H22N4O4S

Mol W.

: 330.4

Cat No.

: SA26505

Impurities, Ranitidine

Ranitidine EP Impurity F

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CAS No.

: 15433-79-1(base);81074-81-9(HClsalt)

Mol F.

: C8H13NO2

Mol W.

: 155.19

Cat No.

: SA26506

Impurities, Ranitidine

Ranitidine EP Impurity G

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CAS No.

: 148639-72-9(base);112233-23-5(HClsalt)

Mol F.

: C5H9N3OS

Mol W.

: 159.19999999999999

Cat No.

: SA26507

Impurities, Ranitidine

Ranitidine EP Impurity H

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CAS No.

: 72078-82-1

Mol F.

: C3H6N2O3

Mol W.

: 118.09

Cat No.

: SA26508

Impurities, Ranitidine

Ranitidine EP Impurity I

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CAS No.

: 207592-21-0

Mol F.

: C27H44N8O6S2

Mol W.

: 640.82

Cat No.

: SA26509

Impurities, Ranitidine

Ranitidine EP Impurity K

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CAS No.

: 61832-41-5

Mol F.

: C4H8N2O2S

Mol W.

: 148.18

Cat No.

: SA26511

Impurities, Ranitidine

Ranitidine Methyl Iodide

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CAS No.

: 13623-94-4

Mol F.

: C15H25IN3OS

Mol W.

: 456.07

Cat No.

: SA26517

Febuxostat, Impurities

RESOLUTION MIXTURE (FEBUXOSTAT – IMP STD )

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CAS No.

: NA

Mol F.

: C32H32N4O6S2

Mol W.

: 632.75

Cat No.

: SA32023

Impurities, Rilpivirine

Rilpivirine

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CAS No.

: 500287-72-9

Mol F.

: C22H18N6

Mol W.

: 366.42

Cat No.

: SA25416

Impurities, Rilpivirine

Rilpivirine amide 1 impurity

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CAS No.

: 500288-66-4

Mol F.

: C22H20N6O

Mol W.

: 384.43

Cat No.

: SA25406

Impurities, Rilpivirine

Rilpivirine Chloro Impurity

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In Stock

CAS No.

: 244768-32-9

Mol F.

: C11H7ClN4

Mol W.

: 230.65

Cat No.

: SA25410

Impurities, Rilpivirine

Rilpivirine Desmethyl Impurity

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CAS No.

: 500292-48-8

Mol F.

: C21H16N6

Mol W.

: 352.4

Cat No.

: SA25420

Impurities, Rilpivirine

Rilpivirine Hydroxy Impurity

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In Stock

CAS No.

: 189956-45-4

Mol F.

: C11H8N4O

Mol W.

: 212.21

Cat No.

: SA25409

Impurities, Rilpivirine

Rilpivirine Nitrile Impurity

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CAS No.

: NA

Mol F.

: C11H12N2

Mol W.

: 172.23

Cat No.

: SA25414

Ezetimibe, Impurities

Ring opened ezetimibe impurity

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In Stock

CAS No.

: 1197811-72-5

Mol F.

: C24H23F2NO3

Mol W.

: 411.44

Cat No.

: SA14847

Rivaroxaban

RIV1-dimer-R Isomer

$155.00 25 mg

In Stock

CAS No.

: 1643354-27-1

Mol F.

: C32H30N4O8

Mol W.

: 598.61

Cat No.

: SA18624

Impurities, Rivaroxaban

RIV1-dimer-S Isomer

$100.00 25 mg

In Stock

CAS No.

Mol F.

: C32H30N4O8

Mol W.

: 598.6

Cat No.

: SA18627

Rivaroxaban

Rivaroxaban 3-Chloro Isomer

$195.00 25 mg

In Stock

CAS No.

: 1855920-54-5

Mol F.

: C19H18ClN3O5S

Mol W.

: 435.88

Cat No.

: SA18608

Rivaroxaban

Rivaroxaban Amine Impurity

$80.00 25 mg

In Stock

CAS No.

: 446292-10-0 (base); 898543-06-1 (HCl salt)

Mol F.

: C₁₄H₁₈ClN₃O₄

Mol W.

: 327.76

Cat No.

: SA18602

Impurities, Rivaroxaban

Rivaroxaban Degradation Product 1

$150.00 25 mg

In Stock

CAS No.

: 1816946-19-6

Mol F.

: C13H19N3O2

Mol W.

: 449.31

Cat No.

: SA18615

Rivaroxaban

Rivaroxaban Descarbanyl Bisthiphene Impurity; Rivaroxaban Amide Dimer

$295.00 25 mg

In Stock

CAS No.

: 1838133-00-8

Mol F.

: C23H21Cl2N3O5S2

Mol W.

: 554.47

Cat No.

: SA18619

Rivaroxaban

Rivaroxaban Descarbony Open-ring Impurity; Rivaroxaban-RVXRC-11

$225.00 25 mg

In Stock

CAS No.

Mol F.

: C18H23Cl2N3O5S

Mol W.

: 427.902●72.92

Cat No.

: SA18612

Rivaroxaban

Rivaroxaban Descarbonyl Impurity; Rivaroxaban Amide Impurity

$195.00 25 mg

In Stock

CAS No.

: 721401-53-2; 482305-98-6

Mol F.

: C18H20ClN3O4S

Mol W.

: 409.89

Cat No.

: SA18611

Rivaroxaban

Rivaroxaban Diol

$455.00 5 mg

In Stock

CAS No.

: 1160170-00-2

Mol F.

: C₁₉H₂₀ClN₃O₆S

Mol W.

: 453.9

Cat No.

: SA18607

Impurities, Rivaroxaban

Rivaroxaban EP Impurity B

$100.00 25 mg

In Stock

CAS No.

: 1429334-00-8

Mol F.

: C16H19N3O5

Mol W.

: 333.34

Cat No.

: SA18613

Rivaroxaban

Rivaroxaban EP Impurity C

$80.00 25 mg

In Stock

CAS No.

: 24065-33-6

Mol F.

: C₅H₃ClO₂S

Mol W.

: 162.59

Cat No.

: SA18603

Rivaroxaban

Rivaroxaban EP Impurity E

$80.00 25 mg

In Stock

CAS No.

: 97799-98-9

Mol F.

: C₆H₆ClNOS

Mol W.

: 175.64

Cat No.

: SA18610

Rivaroxaban

Rivaroxaban EP Impurity E; Deschloro Rivoroxaban

$120.00 25 mg

In Stock

CAS No.

: 1415566-28-7

Mol F.

: C₁₉H₁₉N₃O₅S

Mol W.

: 401.44

Cat No.

: SA18606

Rivaroxaban

Rivaroxaban EP Impurity G

$80.00 25 mg

In Stock

CAS No.

: 446292-08-6

Mol F.

: C22H19N3O6

Mol W.

: 421.40

Cat No.

: SA18609

Impurities, Rivaroxaban

Rivaroxaban EP Impurity I

$250.00 25 mg

In Stock

CAS No.

: 1151893-81-0

Mol F.

: C24H21Cl2N3O7S2

Mol W.

: 598.48

Cat No.

: SA18620

Rivaroxaban

Rivaroxaban EP Impurity J

$250.00 25 mg

In Stock

CAS No.

: 1632463-24-1

Mol F.

: C₃₈H₃₆Cl₂N₆O₁₀S₂

Mol W.

: 871.76

Cat No.

: SA18621

Impurities, Rivaroxaban

Rivaroxaban Impurity B

$100.00 25 mg

In Stock

CAS No.

Mol F.

: C16H19N3O6

Mol W.

: 349.34

Cat No.

: SA18617

Impurities, Nitrosamine, Rivaroxaban

Rivaroxaban Nitroso Impurity 1

$125.00 50 mg

In Stock

CAS No.

: 25413-76-7

Mol F.

: C8H10N2O2

Mol W.

: 166.18

Cat No.

: SA18634

Impurities, Nitrosamine, Rivaroxaban

Rivaroxaban Nitroso Impurity 5

$195.00 50 mg

In Stock

CAS No.

Mol F.

: C13H16ClN3O4

Mol W.

: 313.7

Cat No.

: SA18632

Rivaroxaban

Rivaroxaban Open-Ring acid Impurity

$195.00 25 mg

In Stock

CAS No.

: 931204-39-6; 931117-61-2

Mol F.

: C19H20ClN3O6S

Mol W.

: 453.9

Cat No.

: SA18614

Rivaroxaban

Rivaroxaban Phthalamide Dimer

$100.00 25 mg

In Stock

CAS No.

: 1365267-36-2

Mol F.

: C₃₆H₃₆N₆O₁₀

Mol W.

: 712.71

Cat No.

: SA18605

Rivaroxaban

Rivaroxaban Phthalimido Descarbonyl Impurity

$100.00 25 mg

In Stock

CAS No.

: 1369969-44-7

Mol F.

: C21H21N3O5

Mol W.

: 395.42

Cat No.

: SA18626

Rivaroxaban

Rivaroxaban Phthalimido Descarbonyl Impurity

$80.00 25 mg

In Stock

CAS No.

: 446292-07-5

Mol F.

: C21H21N3O5

Mol W.

: 395.41

Cat No.

: SA18625

Impurities, Nitrosamine, Rivaroxaban

Rivaroxaban Phthalimido Descarbonyl Nitroso Impurity

$355.00 50 mg

In Stock

CAS No.

Mol F.

: C21H20N4O6

Mol W.

: 424.41

Cat No.

: SA18633

Rivaroxaban

Rivaroxaban Related Compound H; 4,5-Dichlorothiophene Rivaroxaban

$165.00 25 mg

In Stock

CAS No.

: 1770812-37-7

Mol F.

: C19H17Cl2N3O5S

Mol W.

: 470.33

Cat No.

: SA18622

Rivaroxaban

Rivaroxaban Urea Dimer; Rivaroxaban EP Impurity D

$100.00 25 mg

In Stock

CAS No.

: 1365267-35-1

Mol F.

: C₂₉H₃₂N₆O₉

Mol W.

: 608.6

Cat No.

: SA18604