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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, Quetiapine

Quetiapine EP Impurity D

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Out of Stock

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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Out of Stock

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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Out of Stock

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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Out of Stock

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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Out of Stock

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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Out of Stock

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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Out of Stock

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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Out of Stock

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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Out of Stock

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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Out of Stock

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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Out of Stock

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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Out of Stock

CAS No.

Mol F.

: C25H34N3O4S

Mol W.

: 472.62

Cat No.

: SA13017

Impurities, Quetiapine

Quetiapine EP Impurity R

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Out of Stock

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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Out of Stock

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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Out of Stock

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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Out of Stock

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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Out of Stock

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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Out of Stock

CAS No.

: 1800608-95-0

Mol F.

: C34H32N4O2S2

Mol W.

: 592.77

Cat No.

: SA13023

Impurities, Quetiapine

Quetiapine HEEP Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 13349-82-1

Mol F.

: C8H18N2O2

Mol W.

: 174.24

Cat No.

: SA13002

Impurities, Quetiapine

Quetiapine N-Oxide

Please enquire for price & pack size

Out of Stock

CAS No.

: 1076199-40-0

Mol F.

: C21H25N3O3S

Mol W.

: 399.51

Cat No.

: SA13004

Impurities, Manidipine

R-(-)-Manidipine

Please enquire for price & pack size

Out of Stock

CAS No.

: 133082-19-6

Mol F.

: C₃₅H₃₈N₄O₆

Mol W.

: 610.7

Cat No.

: SA29802

Impurities, Topiramate

R-Hydroxy Topiramate

Please enquire for price & pack size

Out of Stock

CAS No.

: 198215-60-0

Mol F.

: C12H21NO9S

Mol W.

: 355.36

Cat No.

: SA45515

Impurities, Nitrosamine

rac 1-Nitroso-2-methylindoline

Please enquire for price & pack size

Out of Stock

CAS No.

: 85440-79-5

Mol F.

: C9H10N2O

Mol W.

: 162.19

Cat No.

: SA44640

Atomoxetine, Impurities

rac 3-Chloro-1-phenyl-1-(2-methylphenoxy)propane

Please enquire for price & pack size

Out of Stock

CAS No.

: 881995-47-7

Mol F.

: C16H17ClO

Mol W.

: 260.76

Cat No.

: SA22122

Impurities, Pregabalin

rac 4,5-Dehydro Pregabalin

$250.00 25 mg

Out of Stock

CAS No.

: 216576-74-8

Mol F.

: C8H15NO2

Mol W.

: 157.21

Cat No.

: SA24804

Impurities, Pregabalin

rac 5,6-Dehydro Pregabalin

$995.00 25 mg

Out of Stock

CAS No.

: 1136478-30-2

Mol F.

: C8H15NO2

Mol W.

: 157.21

Cat No.

: SA24805

Impurities, Propranolol

rac 7-Methoxy Propranolol

Please enquire for price & pack size

Out of Stock

CAS No.

: 76275-53-1

Mol F.

: C17H23NO3

Mol W.

: 289.37

Cat No.

: SA24607

Efavirenz, Impurities

Rac Efavirenz Benzoyl Amino Alcohol (USP)

Please enquire for price & pack size

Out of Stock

CAS No.

: 1189491-03-9

Mol F.

: C21H17ClF3NO3

Mol W.

: 423.81

Cat No.

: SA17602

Efavirenz, Impurities

rac Methyl Efavirenz

Please enquire for price & pack size

Out of Stock

CAS No.

: 353270-76-5

Mol F.

: C₁₅H₁₁ClF₃NO₂

Mol W.

: 329.7

Cat No.

: SA17609

Impurities, Nebivolol

rac N-Benzyl Nebivolol

Please enquire for price & pack size

Out of Stock

CAS No.

: 929706-85-4

Mol F.

: C29H31F2NO4

Mol W.

: 495.56

Cat No.

: SA14705

Impurities, Venlafaxine

rac N-Boc-N,O-Didesmethyl Venlafaxine 2,3,4-Tri-O-acetyl-β-D-glucuronide Methyl Este

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C33H47NO13

Mol W.

: 665.72

Cat No.

: SA22722

Impurities, Venlafaxine

rac N-Desmethyl-N-(4-methoxyphenethyl) Venlafaxine

Please enquire for price & pack size

Out of Stock

CAS No.

: 1346601-14-6

Mol F.

: C25H35NO3

Mol W.

: 397.55

Cat No.

: SA22724

Dapoxetine, Impurities

rac N-Didemethyl Dapoxetine

Please enquire for price & pack size

Out of Stock

CAS No.

: 119357-34-5

Mol F.

Mol W.

: C19H19NO

Cat No.

: SA23011

Atomoxetine, Impurities

rac N-Methyl Atomoxetine Oxalate

Please enquire for price & pack size

Out of Stock

CAS No.

: 107688-86-8

Mol F.

: C18H23NO.C2H2O4

Mol W.

: 269.38/90.03

Cat No.

: SA22118

Impurities, Venlafaxine

rac N,N-Didesmethyl-N-(4-hydroxyphenethyl)-O-desmethyl Venlafaxine

Please enquire for price & pack size

Out of Stock

CAS No.

: 1346601-21-5

Mol F.

: C22H29NO3

Mol W.

: 355.47

Cat No.

: SA22727

Impurities, Venlafaxine

rac N,N-Didesmethyl-O-desmethyl Venlafaxine 2,3,4-Tri-O-acetyl-β-D-glucuronide Methyl Este

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C27H37NO11

Mol W.

: 551.58

Cat No.

: SA22732

Impurities, Nebivolol

rac Nebivolol Hydrochloride

Please enquire for price & pack size

Out of Stock

CAS No.

: 169293-50-9

Mol F.

: C22H26ClF2NO4

Mol W.

: 441.9

Cat No.

: SA14704

Carbamazepine, Impurities

rac trans-10,11-Dihydro-10,11-dihydroxy Carbamazepine

$395.00 25 mg

Out of Stock

CAS No.

: 58955-93-4

Mol F.

: C15H14N2O3

Mol W.

: 270.28

Cat No.

: SA20318

Impurities, Praziquantel

rac-1,2,3,6,7,11b-Hexahydro-2-[(4-oxocyclohexyl)carbonyl]-4H-pyrazino[2,1-a]isoquinolin-4-one

Please enquire for price & pack size

Out of Stock

CAS No.

: 57452-32-1

Mol F.

: C19H22N2O3

Mol W.

: 326.39

Cat No.

: SA13904

Impurities, Nicotine

rac-2-Amino Nicotine

Please enquire for price & pack size

Out of Stock

CAS No.

: 32726-84-4

Mol F.

: C₁₀H₁₅N₃

Mol W.

: 177.25

Cat No.

: SA32209

Impurities, Pregabalin

rac-4-Methyl-pregabalin

Please enquire for price & pack size

Out of Stock

CAS No.

: 313651-23-9

Mol F.

: C9H19NO2

Mol W.

: 173.25

Cat No.

: SA24816

Bromhexine, Impurities

rac-cis-Ambroxol

Please enquire for price & pack size

Out of Stock

CAS No.

: 107814-37-9

Mol F.

: C13H18Br2N2O

Mol W.

: 378.10

Cat No.

: SA28407

Dorzolamide, Impurities

rac-Dorzolamide

$255.00 25 mg

Out of Stock

CAS No.

: 120280-13-9

Mol F.

: C10H16N2O4S3

Mol W.

: 324.44

Cat No.

: SA24117

Impurities, Praziquantel

rac-Praziquanamine

$120.00 25 mg

Out of Stock

CAS No.

: 61196-37-0

Mol F.

: C12H14N2O

Mol W.

: 202.25

Cat No.

: SA13907

Impurities, Pregabalin

rac-Pregabalin N-Acrylamide

Please enquire for price & pack size

Out of Stock

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

Out of Stock

CAS No.

: 120279-36-9

Mol F.

: C10H17ClN2O4S3

Mol W.

: 360.9

Cat No.

: SA24119

Impurities, Pitavastatin

Racemic pitvastatin

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C25H23FNO4- .1/2Ca+2

Mol W.

: 420.45. 20

Cat No.

: SA29521

Impurities, Raloxifene

Raloxifene 4-Monomethyl Ether

Please enquire for price & pack size

Out of Stock

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

Please enquire for price & pack size

Out of Stock

CAS No.

: 178451-13-3

Mol F.

: C29H299NO4S

Mol W.

: 487.61

Cat No.

: SA24903

Impurities, Raloxifene

Raloxifene Benzoic Acid Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 84449-80-9

Mol F.

: C14H20ClNO3

Mol W.

: 285.77

Cat No.

: SA24920