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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, Tenofovir

Tenofovir Disoproxil Fumarate

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Out of Stock

CAS No.

: 202138-50-9

Mol F.

: C23H34N5O14P

Mol W.

: 635.51

Cat No.

: SA36924

Impurities, Tenofovir

Tenofovir Disoproxil Fumarate IP Impurity F

$550.00 25 mg

Out of Stock

CAS No.

Mol F.

: C29H42N10Na2O14P2

Mol W.

: 862.63

Cat No.

: SA36906

Impurities, Tenofovir

Tenofovir Disoproxil Fumarate IP Impurity I

$695.00 25 mg

Out of Stock

CAS No.

: 1093279-77-6

Mol F.

: C34H52N10O17P2

Mol W.

: 934.78

Cat No.

: SA36909

Impurities, Tenofovir

Tenofovir Disoproxil Fumarate IP Impurity L

$495.00 25 mg

Out of Stock

CAS No.

Mol F.

: C18H29N6O9P

Mol W.

: 504.43

Cat No.

: SA36912

Impurities, Tenofovir

TENOFOVIR ENANTIOMER SRR-ISOMER

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA36926

Impurities, Terazosin

Terazosin

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Out of Stock

CAS No.

: 63590-64-7

Mol F.

: C19H25N5O4

Mol W.

: 387.43

Cat No.

: SA37300

Impurities, Terazosin

Terazosin EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 23680-84-4

Mol F.

: C10H10ClN3O2

Mol W.

: 239.66

Cat No.

: SA37301

Impurities, Terazosin

Terazosin EP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 1177261-73-2

Mol F.

: C19H24N4O5

Mol W.

: 388.42

Cat No.

: SA37302

Impurities, Terazosin

Terazosin EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 60547-97-9

Mol F.

: C14H19N5O2

Mol W.

: 289.33

Cat No.

: SA37303

Impurities, Terazosin

Terazosin EP Impurity D

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Out of Stock

CAS No.

: 84050-21-5

Mol F.

: C15H19N5O3

Mol W.

: 317.33999999999997

Cat No.

: SA37304

Impurities, Terazosin

Terazosin EP Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 102839-00-9(Base);104965-50-6(HClSalt)

Mol F.

: C24H28N8O4

Mol W.

: 492.53

Cat No.

: SA37305

Impurities, Terazosin

Terazosin EP Impurity F

Please enquire for price & pack size

Out of Stock

CAS No.

: 109678-71-9

Mol F.

: C19H27N5O4

Mol W.

: 389.45

Cat No.

: SA37306

Impurities, Terazosin

Terazosin EP Impurity G

Please enquire for price & pack size

Out of Stock

CAS No.

: 105356-89-6

Mol F.

: C18H23N5O4

Mol W.

: 373.41

Cat No.

: SA37307

Impurities, Terazosin

Terazosin EP Impurity H

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Out of Stock

CAS No.

: 105356-90-9

Mol F.

: C18H23N5O4

Mol W.

: 373.41

Cat No.

: SA37308

Impurities, Terazosin

Terazosin EP Impurity I

Please enquire for price & pack size

Out of Stock

CAS No.

: 1177261-85-6

Mol F.

: C20H27N5O4

Mol W.

: 401.46

Cat No.

: SA37309

Impurities, Terazosin

Terazosin EP Impurity J

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Out of Stock

CAS No.

: 152551-75-2

Mol F.

: C19H27N5O4

Mol W.

: 389.45

Cat No.

: SA37310

Impurities, Terazosin

Terazosin EP Impurity K

Please enquire for price & pack size

Out of Stock

CAS No.

: 19237-84-4

Mol F.

: C19H21N5O4

Mol W.

: 383.4

Cat No.

: SA37311

Impurities, Terazosin

Terazosin EP Impurity L

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C9H12N2O2

Mol W.

: 180.2

Cat No.

: SA37312

Impurities, Terazosin

Terazosin EP Impurity M

Please enquire for price & pack size

Out of Stock

CAS No.

: 31350-27-3

Mol F.

: C14H14N2O4

Mol W.

: 274.27

Cat No.

: SA37313

Impurities, Terazosin

Terazosin EP Impurity N

Please enquire for price & pack size

Out of Stock

CAS No.

: 63074-07-7

Mol F.

: C9H16N2O2

Mol W.

: 184.24

Cat No.

: SA37314

Impurities, Terazosin

Terazosin EP Impurity O

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Out of Stock

CAS No.

: 547730-06-3

Mol F.

: C14H22N2O4

Mol W.

: 282.33999999999997

Cat No.

: SA37315

Impurities, Terbinafine

Terbinafine

Please enquire for price & pack size

Out of Stock

CAS No.

: 91161-71-6 (base) ; 78628-80-5 (HCl salt)

Mol F.

: C21H25N

Mol W.

: 291.43

Cat No.

: SA25723

Impurities, Terbinafine

Terbinafine Carboxy Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 99473-14-0

Mol F.

: C21H23NO2

Mol W.

: 321.41

Cat No.

: SA25706

Impurities, Terbinafine

Terbinafine Carboxy Methyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

: 1076199-76-2

Mol F.

: C22H25NO2

Mol W.

: 335.44

Cat No.

: SA25707

Impurities, Terbinafine

Terbinafine EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 877265-30-0(Salt);187540-01-8(base)

Mol F.

: C21H26ClN

Mol W.

: 327.89

Cat No.

: SA25702

Impurities, Terbinafine

Terbinafine EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 877265-33-3(salt);151222-50-3(base)

Mol F.

: C22H28ClN

Mol W.

: 341.92

Cat No.

: SA25703

Impurities, Terbinafine

Terbinafine EP Impurity F

Please enquire for price & pack size

Out of Stock

CAS No.

: 926281-74-5

Mol F.

: C21H26ClN

Mol W.

: 327.89

Cat No.

: SA25705

Impurities, Terbinafine

Terbinafine N-Desmethylcarboxy Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 99473-15-1

Mol F.

: C20H21NO2

Mol W.

: 307.39

Cat No.

: SA25708

Impurities, Terbinafine

Terbinafine N-oxide

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C21H25NO

Mol W.

: 307.43

Cat No.

: SA25718

Impurities, Terbutaline

Terbutaline

Please enquire for price & pack size

Out of Stock

CAS No.

: 23031-32-5

Mol F.

: C12H19NO3 0.5 H2SO4

Mol W.

: 274.3

Cat No.

: SA29006

Impurities, Terbutaline

Terbutaline 3,5-Dibenzyl Ether

Please enquire for price & pack size

Out of Stock

CAS No.

: 28924-25-6

Mol F.

: C₂₆H₃₁NO₃

Mol W.

: 405.53

Cat No.

: SA29005

Impurities, Terbutaline

Terbutaline EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 99-10-5

Mol F.

: C₇H₆O₄

Mol W.

: 154.12

Cat No.

: SA29001

Impurities, Terbutaline

Terbutaline EP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 153657-83-1(Dihydrate)

Mol F.

: C13H19NO3

Mol W.

: 237.29

Cat No.

: SA29002

Impurities, Terbutaline

Terbutaline EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 1246815-70-2

Mol F.

: C12H17NO3

Mol W.

: 223.27

Cat No.

: SA29003

Impurities, Terbutaline

Terbutaline EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 1797117-23-7

Mol F.

: C19H23NO3

Mol W.

: 313.39

Cat No.

: SA29004

Edoxaban, Impurities

Tert-butyl ((1S,2R,5R)-2-amino-5-(dimethylcarbamoyl)cyclohexyl)carbamate oxalate

Please enquire for price & pack size

Out of Stock

CAS No.

: 2605225-72-5

Mol F.

: C16H29N3O7

Mol W.

: 375.42

Cat No.

: SA33039

Edoxaban, Impurities

Tert-butyl (1R,2S,5R)-2-(3-(5- chloropyridin-2-yl)-2- oxopropanamido)-5- (dimethylcarbamoyl)cyclohexy lcarbamate

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C21H30ClN5O5

Mol W.

: 467.95

Cat No.

: SA33046

Edoxaban, Impurities

Tert-butyl (1S,2R,5S)-2-(2-(5- chloropyridin-2-ylamino)-2- oxoacetamido)-5- (dimethylcarbamoyl)cyclohexy lcarbamate

Please enquire for price & pack size

Out of Stock

CAS No.

: 2024614-15-9

Mol F.

: C21H30ClN5O5

Mol W.

: 467.95

Cat No.

: SA33044

Impurities, Palbociclib

Tert-butyl (6-aminopyridin-3-yl)(2-((tert-butoxycarbonyl)amino)ethyl)carbamate

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C17H28N4O4

Mol W.

: 352.4

Cat No.

: SA40421

Impurities, Palbociclib

Tert-butyl (6-aminopyridin-3-yl)(2-(bis(tert-butoxycarbonyl)amino)ethyl)carbamate

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C22H36N4O6

Mol W.

: 452.6

Cat No.

: SA40422

Impurities, Rosuvastatin

tert-butyl 2-((4R,6R)-2,2-dimethyl-6-((5-methyl-1,3,4-thiadiazol-2-ylsulfonyl)methyl)-1,3-dioxan-4-yl)acetate

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C16H26N2O6S2

Mol W.

: 406.52

Cat No.

: SA121127

Impurities, Rosuvastatin

tert-butyl 2-((4R,6S)-2,2-dimethyl-6-(((R)-5-methyl-1,3,4-thiadiazol-2-ylsulfinyl)methyl)-1,3-dioxan-4-yl)acetate

$1,400.00 50 mg

Out of Stock

CAS No.

Mol F.

: C16H26N2O5S2

Mol W.

: 390.52

Cat No.

: SA121132

Impurities, Rosuvastatin

tert-butyl 2-((4R,6S)-2,2-dimethyl-6-(((S)-5-methyl-1,3,4-thiadiazol-2-ylsulfinyl)methyl)-1,3-dioxan-4-yl)acetate

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C16H26N2O5S2

Mol W.

: 390.52

Cat No.

: SA121133

Impurities, Rosuvastatin

tert-butyl 2-((4R,6S)-6-((E)-2-(4-(4-fluorophenyl)-2-((E)-2-(4-(4-fluorophenyl)-6-isopropyl-2-(N-methylmethylsulfonamido)pyrimidin-5-yl)-N-methylvinylsulfonamido)-6-isopropylpyrimidin-5-yl)vinyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetate

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C45H56F2N6O8S2

Mol W.

: 911.09

Cat No.

: SA121124

Impurities, Rosuvastatin

tert-butyl 2-((4R,6S)-6-((E)-2-(4-(4-fluorophenyl)-2-(2-(4-(4-fluorophenyl)-6-isopropyl-2-(N-methylmethyl sulfonamido)pyrimidin-5-yl)-2-hydroxy-N-methyl ethyl sulfonamido)-6-isopropylpyrimidin-5-yl)vinyl)-2,2-dimethyl-1,3-dioxan-4-yl) acetate

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C45H58F2N6O9S2

Mol W.

: 929.10

Cat No.

: SA121125

Atorvastatin, Impurities

tert-butyl 2-((4R,6S)-6-(2-aminoethyl)-2,2-dimethyl-1,3-dooxan-4-yl)acetate

$500.00 100 mg

Out of Stock

CAS No.

: 2088732-01-6

Mol F.

: C14H27NO4

Mol W.

: 273.19

Cat No.

: SA17838

Impurities, Rosuvastatin

tert-butyl 2-((4S,6R)-2,2-dimethyl-6-((5-methyl-1,3,4-thiadiazol-2-ylsulfonyl)methyl)-1,3-dioxan-4-yl)acetate

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C16H26N2O6S2

Mol W.

: 406.52

Cat No.

: SA121131

Impurities, Rosuvastatin

tert-butyl 2-((4S,6S)-2,2-dimethyl-6-((5-methyl-1,3,4-thiadiazol-2-ylsulfonyl)methyl)-1,3-dioxan-4-yl)acetate

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C16H26N2O6S2

Mol W.

: 406.52

Cat No.

: SA121128

Impurities, Palbociclib

Tert-butyl 2-(6-aminopyridin-3-ylamino)ethylcarbamate

Please enquire for price & pack size

Out of Stock

CAS No.

: 1367858-24-9

Mol F.

: C12H20N4O2

Mol W.

: 252.3

Cat No.

: SA40420

Impurities, Palbociclib

tert-Butyl 4-(2-nitropyridin-3-yl)piperazine-1-carboxylate

Please enquire for price & pack size

Out of Stock

CAS No.

: 1779124-68-3

Mol F.

: C14H20N4O4

Mol W.

: 308.33

Cat No.

: SA40431