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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, Telmisartan

4′-((5-Chloro-1,7′-dimethyl-2′-propyl-1H,3’H-[2,5′-bibenzo[d]imidazol]-3′-yl)methyl)-[1,1′-biphenyl]-2-carboxylic Acid;4′-[(5-Chloro-1,7′-dimethyl-2′-propyl-1H,3’H-[2,5′-bibenzimidazol]-3′-yl)methyl][1,1′-biphenyl]-2-carboxylic Acid

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Out of Stock

CAS No.

: 885045-90-9

Mol F.

: C33H29ClN4O2

Mol W.

: 549.06

Cat No.

: SA33921

Fenofibrate, Impurities

4’-Chloro-3-hydroxy-benzophenone

Please enquire for price & pack size

Out of Stock

CAS No.

: 62810-39-3

Mol F.

: C13H9ClO2

Mol W.

: 232.66

Cat No.

: SA27210

Flurbiprofen, Impurities

4’-Hydroxy Flurbiprofen

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Out of Stock

CAS No.

: 52807-12-2

Mol F.

: C15H13FO3

Mol W.

: 260.26

Cat No.

: SA14612

Impurities, Raloxifene

4’-tert-Butyldimethylsilyl-6-hydroxy Raloxifene

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Out of Stock

CAS No.

: 174264-46-1

Mol F.

: C34H41NO4SSi

Mol W.

: 587.85

Cat No.

: SA24908

Impurities, Palbociclib

5-(1-Piperazinyl)-2-pyridinamine

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Out of Stock

CAS No.

: 1082876-26-3

Mol F.

: C9H14N4

Mol W.

: 178.23

Cat No.

: SA40406

Impurities, Irbesartan

5-[1,1’-Biphenyl]-2-yl-2H-tetrazole

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Out of Stock

CAS No.

: 147330-32-3

Mol F.

: C13H10N4

Mol W.

: 222.25

Cat No.

: SA23314

Impurities, Raloxifene

5-[4-(2-Piperidinyl)ethoxy]benzoyl Raloxifene

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Out of Stock

CAS No.

Mol F.

: C42H44N2O6S

Mol W.

: 704.87

Cat No.

: SA24914

Impurities, Olmesartan Medoxomil

5-[4’-Bromomethyl-(1,1’-biphenyl)-2-yl]-2-triphenylmethyltetrazole

$125.00 25 mg

Out of Stock

CAS No.

: 133051-88-4

Mol F.

: C33H25BrN4

Mol W.

: 557.5

Cat No.

: SA17726

Impurities, Olmesartan Medoxomil

5-[4′-(Bromomethyl)-1,1′-biphenyl-2-yl]-1-triphenylmethyl-1H-tetrazole

$95.00 25 mg

Out of Stock

CAS No.

: 124750-51-2

Mol F.

: C33H25BrN4

Mol W.

: 557.5

Cat No.

: SA17725

Impurities, Oxcarbazepine

5-Acetyl-5,11-dihydro-10H-dibenz[b,f]azepin-10-one

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Out of Stock

CAS No.

: 28291-63-6

Mol F.

: C16H13NO2

Mol W.

: 251.28

Cat No.

: SA12516

Impurities, Olmesartan Medoxomil

5-acetylimidazole-4-carbonitriles

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C9H11N3O

Mol W.

: 177.2

Cat No.

: SA17741

Impurities, Lamivudine

5-Acetyloxy-1,3-oxathiolane-2-carboxylic Acid

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Out of Stock

CAS No.

: 440105-45-3

Mol F.

: C6H8O5S

Mol W.

: 192.19

Cat No.

: SA22314

Clomipramine, Impurities

5-Allyl-3-Chloroiminodibenzyl

Please enquire for price & pack size

Out of Stock

CAS No.

: 1425793-87-8

Mol F.

: C17H16ClN

Mol W.

: 269.77

Cat No.

: SA33707

Allopurinol, Impurities

5-Amino-4-pyrazolecarboxamide

Please enquire for price & pack size

Out of Stock

CAS No.

: 5334-31-6

Mol F.

: C4H6N4O

Mol W.

: 126.12

Cat No.

: SA28909

Azacitidine, Impurities

5-Azacytidine 2’,3’5’-O-triacetate

Please enquire for price & pack size

Out of Stock

CAS No.

: 10302-78-0

Mol F.

: C14H18N4O8

Mol W.

: 370.31

Cat No.

: SA37505

Dapagliflozin, Impurities

5-Bromo-2-chlorobenzoic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 21739-92-4

Mol F.

: C7H4BrClO2

Mol W.

: 235.46

Cat No.

: SA15019

Impurities, Ribociclib

5-Bromo-4-chloro-N-cyclopentylpyrimidin-2-amine

Please enquire for price & pack size

Out of Stock

CAS No.

: 1823404-28-9

Mol F.

: C9H11BrClN3

Mol W.

: 276.56

Cat No.

: SA47110

Brimonidine, Impurities

5-Bromo-6-(1H-imidazol-4-yl)quinoxaline

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Out of Stock

CAS No.

: NA

Mol F.

: C11H7BrN4

Mol W.

: 275.10000000000002

Cat No.

: SA20718

Brimonidine, Impurities

5-bromo-6-isothiocyanatoquinoxaline

Please enquire for price & pack size

Out of Stock

CAS No.

: 134892-46-9

Mol F.

: C9H4BrN3S

Mol W.

: 266.12

Cat No.

: SA20717

Brimonidine, Impurities

5-Bromo-N-propylquinoxalin-2-amine

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C11H12BrN3

Mol W.

: 266.14

Cat No.

: SA20721

Apixaban, Impurities

5-Bromopentanoyl chloride

Please enquire for price & pack size

Out of Stock

CAS No.

: 4509-90-4

Mol F.

: C5H8BrClO

Mol W.

: 99.47

Cat No.

: SA39954

Impurities, Nintedanib

5-Carboxymethyl Desmethyl Acetamido Nintedanib

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C30H31N5O4

Mol W.

: 525.6

Cat No.

: SA22527

Apixaban, Impurities

5-Chlorohexanoyl chloride

Please enquire for price & pack size

Out of Stock

CAS No.

: 99585-01-0

Mol F.

: C6H10Cl2O

Mol W.

: 169.05

Cat No.

: SA39955

Apixaban, Impurities

5-Chloropentanoyl chloride

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Out of Stock

CAS No.

: 1575-61-7

Mol F.

: C5H8Cl2O

Mol W.

: 155

Cat No.

: SA39924

Capecitabine, Impurities

5-Deoxy-D-ribose

$350.00 25 mg

Out of Stock

CAS No.

: 13039-75-3

Mol F.

: C₅H₁₀O₄

Mol W.

: 134.13

Cat No.

: SA37811

Impurities, Losartan

5-Deshydroxymethyl-5-chloro Losartan

$695.00 25 mg

Out of Stock

CAS No.

: 1159977-26-0

Mol F.

: C21H20Cl2N6

Mol W.

: 427.33

Cat No.

: SA26722

Empagliflozin, Impurities

5-DiTHF Empagliflozin impurity

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C27H33ClO8

Mol W.

: 521

Cat No.

: SA15133

Emtricitabine, Impurities

5-epi Emtricitabine Carboxylic Acid; Emtricitabine IP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 1238210-10-0

Mol F.

: C₈H₈FN₃O₄S

Mol W.

: 261.23

Cat No.

: SA22902

Impurities, Niacin

5-Ethyl-2-methylpyridine

Please enquire for price & pack size

Out of Stock

CAS No.

: 104-90-5

Mol F.

: C8H11N

Mol W.

: 121.18

Cat No.

: SA33110

Emtricitabine, Impurities

5-Fluoro Cytosine

Please enquire for price & pack size

Out of Stock

CAS No.

: 2022-85-7

Mol F.

: C4H4FN3O

Mol W.

: 129.09

Cat No.

: SA22919

Emtricitabine, Impurities

5-Fluoro Uracil

Please enquire for price & pack size

Out of Stock

CAS No.

: 51-21-8

Mol F.

: C4H3FN2O2

Mol W.

: 130.08000000000001

Cat No.

: SA22920

Impurities, Vericiguat

5-Fluoro-1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-carboxamide

Please enquire for price & pack size

Out of Stock

CAS No.

: 1361232-73-6

Mol F.

: C14H10F2N4O

Mol W.

: 288.26

Cat No.

: SA50707

Impurities, Salbutamol

5-Hydroxy Albuterol

Please enquire for price & pack size

Out of Stock

CAS No.

: 182676-90-0

Mol F.

: C13H21NO4

Mol W.

: 255.31

Cat No.

: SA26016

Impurities, Leflunomide

5-Hydroxy Leflunomide

Please enquire for price & pack size

Out of Stock

CAS No.

: 1058722-46-5

Mol F.

: C12H9F3N2O3

Mol W.

: 286.20999999999998

Cat No.

: SA21809

Impurities, Valsartan

5-Hydroxy Valsartan

Please enquire for price & pack size

Out of Stock

CAS No.

: 1186103-57-0

Mol F.

: C24H29N5O4

Mol W.

: 451.52

Cat No.

: SA33306

Impurities, Rosuvastatin

5-Hydroxyde((3R,5R)-3,5-dihydroxyhexanoate) Rosuvastatin

Please enquire for price & pack size

Out of Stock

CAS No.

: 371775-71-2

Mol F.

: C15H18FN3O3S

Mol W.

: 339.39

Cat No.

: SA12144

Impurities, Isoquinoline

5-methoxy-3,4-dihydroisoquinoline

Please enquire for price & pack size

Out of Stock

CAS No.

: 1355060-40-0

Mol F.

: C10H11NO

Mol W.

: 161.19999999999999

Cat No.

: SA19301

Deferasirox, Impurities

5-Methoxycarbonyl Deferasirox

Please enquire for price & pack size

Out of Stock

CAS No.

: 1395346-29-8

Mol F.

: C23H17N3O6

Mol W.

: 431.4

Cat No.

: SA25111

Impurities, Rosuvastatin

5-Methyl Formate De(3,5-dihydroxyhept-6-enoate) Rosuvastatin

Please enquire for price & pack size

Out of Stock

CAS No.

: 371775-70-1

Mol F.

: C16H18FN3O4S

Mol W.

: 367.4

Cat No.

: SA12145

Impurities, Rosuvastatin

5-methyl-1,3,4-thiadiazol-2-ol

Please enquire for price & pack size

Out of Stock

CAS No.

: 84352-65-8

Mol F.

: C3H4N2OS

Mol W.

: 116.14

Cat No.

: SA121123

Impurities, Pregabalin

5-Methyl-2-hex-2-enoic Acid Methyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

: 68797-67-1

Mol F.

: C8H14O2

Mol W.

: 142.19999999999999

Cat No.

: SA24838

Impurities, Pregabalin

5-Methyl-3-(nitromethyl)-4-hexenoic Acid Ethyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

: 1136478-28-8

Mol F.

: C10H17NO4

Mol W.

: 215.25

Cat No.

: SA24808

Impurities, Pregabalin

5-Methyl-3-(nitromethyl)hexanoic Acid Ethyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

: 128013-65-0

Mol F.

: C10H19NO4

Mol W.

: 217.26

Cat No.

: SA24806

Impurities, Leflunomide

5-Methylisoxazole-3-carboxylic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 3405-77-4

Mol F.

: C5H5NO3

Mol W.

: 127.1

Cat No.

: SA21815

Impurities, Nitrofurantoin

5-Nitro-2-furaldehyde

Please enquire for price & pack size

Out of Stock

CAS No.

: 698-63-5

Mol F.

: C…HƒNO„

Mol W.

: 141.08

Cat No.

: SA39809

Impurities, Nitrofurantoin

5-Nitro-2-furfuraldazine

Please enquire for price & pack size

Out of Stock

CAS No.

: 112537-96-9

Mol F.

: C€H†N„O†

Mol W.

: 278.18

Cat No.

: SA39811

Impurities, Nitrofurantoin

5-Nitrofuraldehyde Diacetate

Please enquire for price & pack size

Out of Stock

CAS No.

: 92-55-7

Mol F.

: C‰H‰NO‡

Mol W.

: 243.17

Cat No.

: SA39810

Impurities, Niacin

5-Nitronicotinic acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 2047-49-6

Mol F.

: C6H4N2O4

Mol W.

: 168.11

Cat No.

: SA33105

Donepezil, Impurities

5-O-Desmethyl Donepezil Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 120013-57-2

Mol F.

: C23H27NO3

Mol W.

: 365.47

Cat No.

: SA34303

Impurities, Sulpiride

5-Sulphamoylsalicylic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 5378-41-6

Mol F.

: C7H7NO5S

Mol W.

: 217.2

Cat No.

: SA10909