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Impurities

SynThink is a producer and supplier of a number of pharmaceutical Reference Standards (Impurity Standards) which are required for pharmaceutical companies to study quality, stability and biological safety of pharmaceutical products. Many API Impurities are available in our stock.

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Impurities, Risperidone

Risperidone EP Impurity C

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Out of Stock

CAS No.

: 144598-75-4

Mol F.

: C23H27FN4O3

Mol W.

: 426.48

Cat No.

: SA26303

Impurities, Risperidone

Risperidone EP Impurity D

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Out of Stock

CAS No.

: 1199589-74-6

Mol F.

: C23H27FN4O2

Mol W.

: 410.48

Cat No.

: SA26304

Impurities, Risperidone

Risperidone EP Impurity E

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Out of Stock

CAS No.

: 1346602-28-5

Mol F.

: C24H29FN4O2

Mol W.

: 424.51

Cat No.

: SA26305

Impurities, Risperidone

Risperidone EP Impurity F

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Out of Stock

CAS No.

: 1346603-86-8

Mol F.

: C24H27FN4O4

Mol W.

: 454.49

Cat No.

: SA26306

Impurities, Risperidone

Risperidone EP Impurity H

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Out of Stock

CAS No.

: 158697-67-7

Mol F.

: C23H27F2N3O2

Mol W.

: 415.48

Cat No.

: SA26307

Impurities, Risperidone

Risperidone EP Impurity I

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Out of Stock

CAS No.

: 1329796-66-8

Mol F.

: C36H39F2N5O3

Mol W.

: 615.71

Cat No.

: SA26308

Impurities, Risperidone

Risperidone EP Impurity J

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Out of Stock

CAS No.

: 1346606-24-3

Mol F.

: C35H40F2N6O3

Mol W.

: 630.73

Cat No.

: SA26309

Impurities, Risperidone

Risperidone EP Impurity K

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Out of Stock

CAS No.

: 106266-09-5

Mol F.

: C23H28N4O2

Mol W.

: 392.49

Cat No.

: SA26310

Impurities, Risperidone

Risperidone EP Impurity L

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Out of Stock

CAS No.

: 63234-80-0

Mol F.

: C11H15ClN2O

Mol W.

: 226.7

Cat No.

: SA26311

Impurities, Risperidone

Risperidone EP Impurity M

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Out of Stock

CAS No.

: 84163-77-9(base);84163-13-3(HClsalt)

Mol F.

: C12H13FN2O

Mol W.

: 220.24

Cat No.

: SA26312

Impurities, Risperidone

Risperidone Ethyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 70381-58-7

Mol F.

: C11H16N2O

Mol W.

: 192.26

Cat No.

: SA26319

Impurities, Risperidone

Risperidone Hydroxyethyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 66698-27-9

Mol F.

: C11H16N2O2

Mol W.

: 208.26

Cat No.

: SA26320

Impurities, Risperidone

Risperidone N-Oxide

Please enquire for price & pack size

Out of Stock

CAS No.

: 832747-55-4

Mol F.

: C23H27FN4O3

Mol W.

: 426.48

Cat No.

: SA26313

Impurities, Risperidone

Risperidone Piperidine Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H25F2N3O2

Mol W.

: 425.47

Cat No.

: SA26321

Impurities, Risperidone

Risperidone Pyridopyrimidinone Impurity | CAS : 41078-70-0

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Out of Stock

CAS No.

: 41078-70-0

Mol F.

: C11H11ClN2O

Mol W.

: 222.67

Cat No.

: SA26324

Impurities, Risperidone

Risperidone USP RC G

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Out of Stock

CAS No.

: 152542-00-2

Mol F.

: C23H28FN3O3

Mol W.

: 413.49

Cat No.

: SA26322

Impurities, Ritlecitinib

Ritlecitinib

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C15H19N5O

Mol W.

: 285.34

Cat No.

: SA50000

Impurities, Ritlecitinib

Ritlecitinib Degradation Dimer

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C30H38N10O2

Mol W.

: 570.69

Cat No.

: SA50008

Impurities, Rivaroxaban

Rivaroxaban

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Out of Stock

CAS No.

: 366789-02-8

Mol F.

: C19H18ClN3O5S

Mol W.

: 435.88

Cat No.

: SA18629

Impurities, Rivaroxaban

Rivaroxaban

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Out of Stock

CAS No.

: 366789-02-8

Mol F.

: C₁₉H₁₈ClN₃O₅S

Mol W.

: 435.88

Cat No.

: SA18600

Impurities, Rivaroxaban

Rivaroxaban Impurity D

$350.00 25 mg

Out of Stock

CAS No.

: 1838139-24-4

Mol F.

: C19H18N3O5ClS

Mol W.

: 435.88

Cat No.

: SA18618

Impurities, Roflumilast

Roflumilast

Please enquire for price & pack size

Out of Stock

CAS No.

: 162401-32-3

Mol F.

: C17H14Cl2F2N2O3

Mol W.

: 403.2

Cat No.

: SA38100

Impurities, Roflumilast

Roflumilast Carboxylic Acid Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 162401-62-9

Mol F.

: C12H12F2O4

Mol W.

: 258.22

Cat No.

: SA38105

Impurities, Roflumilast

Roflumilast Descyclopropylmethyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 1391052-76-8

Mol F.

: C13H8Cl2F2N2O3

Mol W.

: 349.11

Cat No.

: SA38102

Impurities, Roflumilast

Roflumilast Dicyclopropylmethoxy Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 1391052-24-6

Mol F.

: C20H20Cl2N2O3

Mol W.

: 407.29

Cat No.

: SA38101

Impurities, Roflumilast

Roflumilast Dihydroxy Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 1412448-29-3

Mol F.

: C12H8Cl2N2O3

Mol W.

: 299.11

Cat No.

: SA38103

Impurities, Roflumilast

Roflumilast N-Oxide

Please enquire for price & pack size

Out of Stock

CAS No.

: 292135-78-5

Mol F.

: C17H14Cl2F2N2O4

Mol W.

: 419.2

Cat No.

: SA38104

Impurities, Ropinirole

Ropinirole

Please enquire for price & pack size

Out of Stock

CAS No.

: 91374-21-9

Mol F.

: C16H25ClN2O

Mol W.

: 296.84

Cat No.

: SA41200

Impurities, Ropinirole

Ropinirole 3-Methoxy Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 1797131-21-5

Mol F.

: C17H27ClN2O2

Mol W.

: 326.86

Cat No.

: SA41216

Impurities, Ropinirole

Ropinirole Aminoacetic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 920755-10-8

Mol F.

: C16H25N2NaO2

Mol W.

: 278.39

Cat No.

: SA41212

Impurities, Ropinirole

Ropinirole Bromoethyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 120427-96-5

Mol F.

: C10H10BrNO

Mol W.

: 240.1

Cat No.

: SA41213

Impurities, Ropinirole

Ropinirole EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 221264-21-7 (HCl salt)

Mol F.

: C16H23ClN2O2

Mol W.

: 310.82

Cat No.

: SA41201

Impurities, Ropinirole

Ropinirole EP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 249622-60-4

Mol F.

: C16H24N2O

Mol W.

: 260.37

Cat No.

: SA41202

Impurities, Ropinirole

Ropinirole EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 221264-43-3 (Z/E); 145570-92-9 (Z)

Mol F.

: C19H29ClN2O

Mol W.

: 336.9

Cat No.

: SA41203

Impurities, Ropinirole

Ropinirole EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 173990-76-6

Mol F.

: CƒH‰ClN‚O

Mol W.

: 254.76

Cat No.

: SA41204

Impurities, Ropinirole

Ropinirole EP Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C17H24N2O

Mol W.

: 272.39

Cat No.

: SA41205

Impurities, Ropinirole

Ropinirole EP Impurity F

Please enquire for price & pack size

Out of Stock

CAS No.

: 139122-19-3

Mol F.

: C€HNO‚

Mol W.

: 177.2

Cat No.

: SA41206

Impurities, Ropinirole

Ropinirole EP Impurity G

Please enquire for price & pack size

Out of Stock

CAS No.

: 76149-15-0

Mol F.

: C†H‚„N‚

Mol W.

: 244.38

Cat No.

: SA41207

Impurities, Ropinirole

Ropinirole EP Impurity H

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C16H23N3O2

Mol W.

: 289.37

Cat No.

: SA41208

Impurities, Ropinirole

Ropinirole N-Ethyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 1797132-03-6

Mol F.

: CˆH‚ˆN‚O

Mol W.

: 288.43

Cat No.

: SA41209

Impurities, Ropinirole

Ropinirole N-Hydroxy Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 954117-22-7 (base)

Mol F.

: C16H25ClN2O2

Mol W.

: 312.83

Cat No.

: SA41215

Impurities, Ropinirole

Ropinirole N-Hydroxymethyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 1027600-42-5

Mol F.

: C17H26N2O2

Mol W.

: 290.4

Cat No.

: SA41210

Impurities, Ropinirole

Ropinirole N-Oxide

Please enquire for price & pack size

Out of Stock

CAS No.

: 1076199-41-1 (base)

Mol F.

: C16H25ClN2O2 (HCl salt)

Mol W.

: 312.83

Cat No.

: SA41214

Impurities, Ropinirole

Ropinirole Open Ring Nitro Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 91374-25-3

Mol F.

: C16H25ClN2O4

Mol W.

: 344.83

Cat No.

: SA41211

Impurities, Rosuvastatin

Rosuvastatin (3R,5R)-Isomer Ethyl Ester

$1,050.00 25 mg

Out of Stock

CAS No.

Mol F.

: C24H32FN3O6S

Mol W.

: 509.59

Cat No.

: SA12172

Impurities, Rosuvastatin

Rosuvastatin (3R,5R)-Lactone

$850.00 25 mg

Out of Stock

CAS No.

: 1422954-11-7

Mol F.

: C22H26FN3O5S

Mol W.

: 463.52

Cat No.

: SA12173

Impurities, Rosuvastatin

Rosuvastatin (3S,5R)-Isomer Ethyl Ester

$650.00 25 mg

Out of Stock

CAS No.

Mol F.

: C24H32FN3O6S

Mol W.

: 509.59

Cat No.

: SA12174

Impurities, Rosuvastatin

Rosuvastatin (3S,5R)-Isomer Methyl Ester

$600.00 25 mg

Out of Stock

CAS No.

: 615263-54-2

Mol F.

: C23H30FN3O6S

Mol W.

: 495.56

Cat No.

: SA12175

Impurities, Rosuvastatin

Rosuvastatin (3S,5S)-Isomer Ethyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C24H32FN3O6S

Mol W.

: 509.59

Cat No.

: SA12176

Impurities, Rosuvastatin

Rosuvastatin (3S,5S)-Isomer Methyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C23H30FN3O6S

Mol W.

: 495.56

Cat No.

: SA12177