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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, Promazine

Promazine EP Impurity D

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CAS No.

Mol F.

: C31H31N3S2 : HCl

Mol W.

: 509.7 : 36.5

Cat No.

: SA49804

Impurities, Promethazine

Promethazine

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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

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CAS No.

: 5568-90-1

Mol F.

: C17H21ClN2S

Mol W.

: 320.88

Cat No.

: SA42902

Impurities, Promethazine

Promethazine EP Impurity A

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CAS No.

: 92-84-2

Mol F.

: C12H9NS

Mol W.

: 199.27

Cat No.

: SA42901

Impurities, Promethazine

Promethazine EP Impurity C

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CAS No.

: 60113-77-1

Mol F.

: C16H19ClN2S

Mol W.

: 270.39

Cat No.

: SA42903

Impurities, Promethazine

Promethazine EP Impurity D

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CAS No.

: 7640-51-9

Mol F.

: C17H20N2OS

Mol W.

: 300.42

Cat No.

: SA42904

Impurities, Propranolol

Propranolol 5-Hydroxy Impurity

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CAS No.

: 62117-35-5

Mol F.

: C16H21NO3

Mol W.

: 275.33999999999997

Cat No.

: SA24606

Impurities, Propranolol

Propranolol 7-Hydroxy Impurity

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CAS No.

: 81907-81-5

Mol F.

: C16H21NO3

Mol W.

: 275.33999999999997

Cat No.

: SA24605

Impurities, Propranolol

Propranolol Azide impurity

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CAS No.

: 87102-64-5

Mol F.

: C13H13N3O2

Mol W.

: 243.26

Cat No.

: SA24608

Impurities, Propranolol

Propranolol N-Desisopropyl Impurity

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CAS No.

: 62618-09-1

Mol F.

: C13H16ClNO2

Mol W.

: 253.72

Cat No.

: SA24604

Impurities, Prucalopride

Prucalopride Hydroxy Impurity

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CAS No.

: 1900715-97-0

Mol F.

: C18H26ClN3O4

Mol W.

: 383.87

Cat No.

: SA43102

Impurities, Prucalopride

Prucalopride impurity B

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CAS No.

: 182808-16-8

Mol F.

: C9H9ClN2O2

Mol W.

: 212.63

Cat No.

: SA43106

Impurities, Prucalopride

Prucalopride impurity D

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CAS No.

: 182808-04-4

Mol F.

: C10H10ClNO3

Mol W.

: 227.64

Cat No.

: SA43107

Impurities, Prucalopride

Prucalopride N-Desmethoxypropyl Impurity

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CAS No.

: 137211-64-4

Mol F.

: C14H18ClN3O2

Mol W.

: 295.76

Cat No.

: SA43100

Impurities, Prucalopride

Prucalopride N-Ethoxycarbonyl Analog

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CAS No.

: 137211-63-3

Mol F.

: C17H22ClN3O4

Mol W.

: 367.83

Cat No.

: SA43105

Impurities, Prucalopride

Prucalopride RC 4

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CAS No.

: 1900715-96-9

Mol F.

: C18H24ClN3O3

Mol W.

: 365.85

Cat No.

: SA43103

Impurities, Prucalopride

Prucalopride Succinate

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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

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CAS No.

: NA

Mol F.

: C24H36ClN3O8

Mol W.

: 530.01

Cat No.

: SA43104

Impurities, Prucalopride

Prucalopride-N-Oxide

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CAS No.

: 1900715-98-1

Mol F.

: C18H26ClN3O4

Mol W.

: 383.87

Cat No.

: SA43101

Impurities, Niacin

Pyridine

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CAS No.

: 110-86-1

Mol F.

: C5H5N

Mol W.

: 79.099999999999994

Cat No.

: SA33106

Donepezil, Impurities

Pyridine Dehydro Donepezil Impurity

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CAS No.

: 4803-74-1

Mol F.

: C17H15NO3

Mol W.

: 281.31

Cat No.

: SA34316

Donepezil, Impurities

Pyridine Dehydro N-Oxide Donepezil Impurity

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CAS No.

: 896134-06-8

Mol F.

: C17H15NO4

Mol W.

: 297.31

Cat No.

: SA34314

Donepezil, Impurities

Pyridine N-Oxide Donepezil

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CAS No.

: 896134-07-9

Mol F.

: C17H17NO4

Mol W.

: 299.32

Cat No.

: SA34315

Impurities, Palbociclib

Pyridine N-Oxide Palbociclib

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CAS No.

: 2098673-40-4

Mol F.

: C24H29N7O3

Mol W.

: 464.53

Cat No.

: SA40405

Impurities, Pyrrolidine

Pyrrolidine

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CAS No.

: 123-75-1

Mol F.

: C4H9N

Mol W.

: 71.11

Cat No.

: SA49400

Impurities, Quetiapine

Quetiapine EP Impurity A

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CAS No.

: 844639-07-2

Mol F.

: C23H27N3O3S

Mol W.

: 425.54

Cat No.

: SA13007

Impurities, Quetiapine

Quetiapine EP Impurity B

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CAS No.

: 5747-48-8

Mol F.

: C17H17N3S

Mol W.

: 295.41

Cat No.

: SA13003

Impurities, Quetiapine

Quetiapine EP impurity C

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CAS No.

: 1798840-31-9

Mol F.

: C40H42N6O3S2

Mol W.

: 718.95

Cat No.

: SA13008

Impurities, Quetiapine

Quetiapine EP Impurity D

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CAS No.

: 945668-94-0

Mol F.

: C30H24N4S2

Mol W.

: 504.67

Cat No.

: SA13006

Impurities, Quetiapine

Quetiapine EP Impurity E

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CAS No.

: 1371638-05-9

Mol F.

: C40H44N6O2S2

Mol W.

: 704.95

Cat No.

: SA13009

Impurities, Quetiapine

Quetiapine EP impurity F

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CAS No.

: 848814-27-7

Mol F.

: C₂₁H₂₇N₃O₃S

Mol W.

: 401.52

Cat No.

: SA13010

Impurities, Quetiapine

Quetiapine EP Impurity G

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CAS No.

: 3159-07-7

Mol F.

: C13H9NOS

Mol W.

: 227.28

Cat No.

: SA13001

Impurities, Quetiapine

Quetiapine EP Impurity I

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CAS No.

: 329216-67-3

Mol F.

: C19H21N3OS

Mol W.

: 339.45

Cat No.

: SA13005

Impurities, Quetiapine

Quetiapine EP Impurity J

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CAS No.

: 1356906-17-6

Mol F.

: C25H33N3O4S

Mol W.

: 471.61

Cat No.

: SA13011

Impurities, Quetiapine

Quetiapine EP Impurity K

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CAS No.

: 1371638-10-6

Mol F.

: C23H29N3O4S

Mol W.

: 443.56

Cat No.

: SA13012

Impurities, Quetiapine

Quetiapine EP Impurity L

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CAS No.

: 1371638-11-7

Mol F.

: C21H24ClN3O2S

Mol W.

: 417.95

Cat No.

: SA13013

Impurities, Quetiapine

Quetiapine EP Impurity N

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CAS No.

: 1800291-86-4

Mol F.

: C27H37N5O2S

Mol W.

: 495.68

Cat No.

: SA13014

Impurities, Quetiapine

Quetiapine EP Impurity O

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CAS No.

: 844639-06-1

Mol F.

: C40H39N3O2S

Mol W.

: 625.82

Cat No.

: SA13015

Impurities, Quetiapine

Quetiapine EP Impurity P

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CAS No.

: 1011758-03-4

Mol F.

: C19H21N3S

Mol W.

: 323.46

Cat No.

: SA13016

Impurities, Quetiapine

Quetiapine EP Impurity Q

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CAS No.

Mol F.

: C25H34N3O4S

Mol W.

: 472.62

Cat No.

: SA13017

Impurities, Quetiapine

Quetiapine EP Impurity R

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CAS No.

: 2459-05-4

Mol F.

: C6H8O4

Mol W.

: 144.13

Cat No.

: SA13018

Impurities, Quetiapine

Quetiapine EP Impurity S

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CAS No.

: 329216-63-9

Mol F.

: C21H25N3O3S

Mol W.

: 399.51

Cat No.

: SA13019

Impurities, Quetiapine

Quetiapine EP Impurity T

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CAS No.

: 5747-46-6

Mol F.

: C17H16N2OS

Mol W.

: 296.39

Cat No.

: SA13020

Impurities, Quetiapine

Quetiapine EP Impurity U

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CAS No.

: 5786-26-5

Mol F.

: C13H10N2S

Mol W.

: 226.3

Cat No.

: SA13021

Impurities, Quetiapine

Quetiapine EP Impurity V

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CAS No.

: 2204369-14-0(Base)

Mol F.

: C21H25N3O2

Mol W.

: 351.44

Cat No.

: SA13022

Impurities, Quetiapine

Quetiapine EP Impurity W

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CAS No.

: 1800608-95-0

Mol F.

: C34H32N4O2S2

Mol W.

: 592.77

Cat No.

: SA13023

Impurities, Quetiapine

Quetiapine HEEP Impurity

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CAS No.

: 13349-82-1

Mol F.

: C8H18N2O2

Mol W.

: 174.24

Cat No.

: SA13002

Impurities, Quetiapine

Quetiapine N-Oxide

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CAS No.

: 1076199-40-0

Mol F.

: C21H25N3O3S

Mol W.

: 399.51

Cat No.

: SA13004

Impurities, Manidipine

R-(-)-Manidipine

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CAS No.

: 133082-19-6

Mol F.

: C₃₅H₃₈N₄O₆

Mol W.

: 610.7

Cat No.

: SA29802

Impurities, Topiramate

R-Hydroxy Topiramate

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CAS No.

: 198215-60-0

Mol F.

: C12H21NO9S

Mol W.

: 355.36

Cat No.

: SA45515