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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, Prednisolone

Prednisolone-17-ethylcarbonate

$255.00 25 mg

Out of Stock

CAS No.

: 104286-02-4

Mol F.

: C₂₄H₃₂O₇

Mol W.

: 432.51

Cat No.

: SA16702

Impurities, Prednisolone

Prednisolone-21-acetate-17-ethylcarbonate

$395.00 25 mg

Out of Stock

CAS No.

: 671225-23-3

Mol F.

: C26H34O8

Mol W.

: 474.54

Cat No.

: SA16705

Impurities, Prednisolone

Prednisolone-21-propanoate

$295.00 25 mg

Out of Stock

CAS No.

: 5740-62-5

Mol F.

: C24H32O6

Mol W.

: 416.51

Cat No.

: SA16703

Impurities, Prednisone

Prednisone 17, 21-Diacetate

Please enquire for price & pack size

Out of Stock

CAS No.

: 6677-19-6

Mol F.

: C25H30O7

Mol W.

: 442.5

Cat No.

: SA26201

Impurities, Prednisone

Prednisone 21-Sulfate Ester Sodium Salt

Please enquire for price & pack size

Out of Stock

CAS No.

: 113092-08-3

Mol F.

: C21H25NaO8S

Mol W.

: 460.47

Cat No.

: SA26204

Impurities, Prednisone

Prednisone Epoxide Impurity | CAS NO : 7091-05-6

Please enquire for price & pack size

Out of Stock

CAS No.

: 7091-05-6

Mol F.

: C21H26O5

Mol W.

: 358.4

Cat No.

: SA26222

Impurities, Pregabalin

Pregabalin 3-Cyano Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 181289-16-7

Mol F.

: C8H13NO2

Mol W.

: 155.19

Cat No.

: SA24828

Impurities, Pregabalin

Pregabalin Diacid Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 5702-99-8

Mol F.

: C8H14O4

Mol W.

: 174.2

Cat No.

: SA24846

Impurities, Pregabalin

Pregabalin Lactose Conjugate Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C20H35NO11

Mol W.

: 465.49

Cat No.

: SA24847

Impurities, Testosterone

Prenortestosterone

Please enquire for price & pack size

Out of Stock

CAS No.

: 1089-78-7

Mol F.

: C18H26O2

Mol W.

: 274.4

Cat No.

: SA16201

Impurities, Primidone

Primidone

Please enquire for price & pack size

Out of Stock

CAS No.

: 125-33-7

Mol F.

: C₁₂H₁₄N₂O₂

Mol W.

: 218.25

Cat No.

: SA20600

Impurities, Prochlorperazine Maleate

Prochlorperazine Maleate Degradant II

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C20H24ClN3O2S

Mol W.

: 405.94

Cat No.

: SA45600

Impurities, Prochlorperazine Maleate

Prochlorperazine Maleate Degradant IV

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C20H24ClN3OS

Mol W.

: 389.94

Cat No.

: SA45601

Impurities, Progesterone

Progesterone

Please enquire for price & pack size

Out of Stock

CAS No.

: 57-83-0

Mol F.

: C21H30O2

Mol W.

: 314.46

Cat No.

: SA18000

Impurities, Progesterone

Progesterone 17α-Hydroxy Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 68-96-2

Mol F.

: C21H30O3

Mol W.

: 330.46

Cat No.

: SA18016

Impurities, Progesterone

Progesterone EP Impurity F

Please enquire for price & pack size

Out of Stock

CAS No.

: 2257421-78-4

Mol F.

: C27H38O2

Mol W.

: 394.59

Cat No.

: SA18015

Impurities, Progesterone

Progesterone EP Impurity I

Please enquire for price & pack size

Out of Stock

CAS No.

: 24254-01-1

Mol F.

: C22H32O2

Mol W.

: 328.49

Cat No.

: SA18007

Impurities, Progesterone

Progesterone EP Impurity L

Please enquire for price & pack size

Out of Stock

CAS No.

: 2257421-80-8

Mol F.

: C22H30O2

Mol W.

: 326.48

Cat No.

: SA18010

Impurities, Promazine

Promazine

Please enquire for price & pack size

Out of Stock

CAS No.

: 58-40-2

Mol F.

: C17H20N2S

Mol W.

: 284.4

Cat No.

: SA49800

Impurities, Promazine

Promazine EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 146-21-4

Mol F.

: C17H20N2OS

Mol W.

: 300.4

Cat No.

: SA49801

Impurities, Promazine

Promazine EP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 17140-12-4

Mol F.

: C16H18N2S : HCl

Mol W.

: 270.4 : 36.5

Cat No.

: SA49802

Impurities, Promazine

Promazine EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 92-84-2

Mol F.

: C12H9NS

Mol W.

: 199.3

Cat No.

: SA49803

Impurities, Promazine

Promazine EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C31H31N3S2 : HCl

Mol W.

: 509.7 : 36.5

Cat No.

: SA49804

Impurities, Promethazine

Promethazine

Please enquire for price & pack size

Out of Stock

CAS No.

: 60-87-7;58-33-3(HCl)

Mol F.

: C17H21ClN2S

Mol W.

: 320.88

Cat No.

: SA42900

Impurities, Promethazine

Promethazine BP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 5568-90-1

Mol F.

: C17H21ClN2S

Mol W.

: 320.88

Cat No.

: SA42902

Impurities, Promethazine

Promethazine EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 92-84-2

Mol F.

: C12H9NS

Mol W.

: 199.27

Cat No.

: SA42901

Impurities, Promethazine

Promethazine EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 60113-77-1

Mol F.

: C16H19ClN2S

Mol W.

: 270.39

Cat No.

: SA42903

Impurities, Promethazine

Promethazine EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 7640-51-9

Mol F.

: C17H20N2OS

Mol W.

: 300.42

Cat No.

: SA42904

Impurities, Propranolol

Propranolol 5-Hydroxy Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 62117-35-5

Mol F.

: C16H21NO3

Mol W.

: 275.33999999999997

Cat No.

: SA24606

Impurities, Propranolol

Propranolol 7-Hydroxy Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 81907-81-5

Mol F.

: C16H21NO3

Mol W.

: 275.33999999999997

Cat No.

: SA24605

Impurities, Propranolol

Propranolol Azide impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 87102-64-5

Mol F.

: C13H13N3O2

Mol W.

: 243.26

Cat No.

: SA24608

Impurities, Propranolol

Propranolol N-Desisopropyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 62618-09-1

Mol F.

: C13H16ClNO2

Mol W.

: 253.72

Cat No.

: SA24604

Impurities, Prucalopride

Prucalopride Hydroxy Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 1900715-97-0

Mol F.

: C18H26ClN3O4

Mol W.

: 383.87

Cat No.

: SA43102

Impurities, Prucalopride

Prucalopride impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 182808-16-8

Mol F.

: C9H9ClN2O2

Mol W.

: 212.63

Cat No.

: SA43106

Impurities, Prucalopride

Prucalopride impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 182808-04-4

Mol F.

: C10H10ClNO3

Mol W.

: 227.64

Cat No.

: SA43107

Impurities, Prucalopride

Prucalopride N-Desmethoxypropyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 137211-64-4

Mol F.

: C14H18ClN3O2

Mol W.

: 295.76

Cat No.

: SA43100

Impurities, Prucalopride

Prucalopride N-Ethoxycarbonyl Analog

Please enquire for price & pack size

Out of Stock

CAS No.

: 137211-63-3

Mol F.

: C17H22ClN3O4

Mol W.

: 367.83

Cat No.

: SA43105

Impurities, Prucalopride

Prucalopride RC 4

Please enquire for price & pack size

Out of Stock

CAS No.

: 1900715-96-9

Mol F.

: C18H24ClN3O3

Mol W.

: 365.85

Cat No.

: SA43103

Impurities, Prucalopride

Prucalopride Succinate

Please enquire for price & pack size

Out of Stock

CAS No.

: 179474-85-2; 179474-81-8 (free base)

Mol F.

: C22H32ClN3O7

Mol W.

: 485.96

Cat No.

: SA43109

Impurities, Prucalopride

Prucalopride-N-Galactopyranoside

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H36ClN3O8

Mol W.

: 530.01

Cat No.

: SA43104

Impurities, Prucalopride

Prucalopride-N-Oxide

Please enquire for price & pack size

Out of Stock

CAS No.

: 1900715-98-1

Mol F.

: C18H26ClN3O4

Mol W.

: 383.87

Cat No.

: SA43101

Impurities, Niacin

Pyridine

Please enquire for price & pack size

Out of Stock

CAS No.

: 110-86-1

Mol F.

: C5H5N

Mol W.

: 79.099999999999994

Cat No.

: SA33106

Donepezil, Impurities

Pyridine Dehydro Donepezil Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 4803-74-1

Mol F.

: C17H15NO3

Mol W.

: 281.31

Cat No.

: SA34316

Donepezil, Impurities

Pyridine Dehydro N-Oxide Donepezil Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 896134-06-8

Mol F.

: C17H15NO4

Mol W.

: 297.31

Cat No.

: SA34314

Donepezil, Impurities

Pyridine N-Oxide Donepezil

Please enquire for price & pack size

Out of Stock

CAS No.

: 896134-07-9

Mol F.

: C17H17NO4

Mol W.

: 299.32

Cat No.

: SA34315

Impurities, Palbociclib

Pyridine N-Oxide Palbociclib

Please enquire for price & pack size

Out of Stock

CAS No.

: 2098673-40-4

Mol F.

: C24H29N7O3

Mol W.

: 464.53

Cat No.

: SA40405

Impurities, Pyrrolidine

Pyrrolidine

Please enquire for price & pack size

Out of Stock

CAS No.

: 123-75-1

Mol F.

: C4H9N

Mol W.

: 71.11

Cat No.

: SA49400

Impurities, Quetiapine

Quetiapine EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 844639-07-2

Mol F.

: C23H27N3O3S

Mol W.

: 425.54

Cat No.

: SA13007

Impurities, Quetiapine

Quetiapine EP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 5747-48-8

Mol F.

: C17H17N3S

Mol W.

: 295.41

Cat No.

: SA13003

Impurities, Quetiapine

Quetiapine EP impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 1798840-31-9

Mol F.

: C40H42N6O3S2

Mol W.

: 718.95

Cat No.

: SA13008