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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, Tolterodine

Tolterodine EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 124935-89-3

Mol F.

: C23H33NO

Mol W.

: 339.51

Cat No.

: SA28201

Impurities, Tolterodine

Tolterodine EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 1391053-65-8

Mol F.

: C20H27NO

Mol W.

: 297.43

Cat No.

: SA28202

Impurities, Tolterodine

Tolterodine EP Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 480432-14-2

Mol F.

: C19H25NO

Mol W.

: 283.41000000000003

Cat No.

: SA28203

Impurities, Tolterodine

Tolterodine EP Impurity F

Please enquire for price & pack size

Out of Stock

CAS No.

: 124937-54-8

Mol F.

: C22H31NO

Mol W.

: 325.49

Cat No.

: SA28204

Impurities, Tolterodine

Tolterodine EP Impurity G

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C22H31NO2

Mol W.

: 341.49

Cat No.

: SA28205

Impurities, Tolterodine

Tolterodine lactol impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 209747-04-6

Mol F.

: C16H16O2

Mol W.

: 240.3

Cat No.

: SA28210

Impurities, Tolterodine

Tolterodine lactone impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 40546-94-9

Mol F.

: C16H14O2

Mol W.

: 238.28

Cat No.

: SA28211

Impurities, Tolterodine

Tolterodine Methoxy Propylamine Impurity Racemate

Please enquire for price & pack size

Out of Stock

CAS No.

: 1017224-71-3

Mol F.

: C17H21NO

Mol W.

: 255.35

Cat No.

: SA28215

Impurities, Topiramate

Topiramate

Please enquire for price & pack size

Out of Stock

CAS No.

: 97240-79-4

Mol F.

: C12H21NO8S

Mol W.

: 339.36

Cat No.

: SA45500

Impurities, Topiramate

Topiramate Azidosulfate Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 106881-35-0

Mol F.

: C12H19N3O8S

Mol W.

: 365.36

Cat No.

: SA45516

Impurities, Topiramate

Topiramate Chlorosulfonyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 150609-95-3

Mol F.

: C12H19ClO8S

Mol W.

: 358.79

Cat No.

: SA45508

Impurities, Topiramate

Topiramate Di-desisopropylidene Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 106881-42-9

Mol F.

: C6H13NO8S

Mol W.

: 259.23

Cat No.

: SA45506

Impurities, Topiramate

Topiramate EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 20880-92-6

Mol F.

: C12H20O6

Mol W.

: 260.27999999999997

Cat No.

: SA45504

Impurities, Topiramate

Topiramate EP impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 876403-98-4

Mol F.

: C17H30N2O9S

Mol W.

: 438.49

Cat No.

: SA45501

Impurities, Topiramate

Topiramate EP impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 106881-41-8

Mol F.

: C9H17NO8S

Mol W.

: 299.3

Cat No.

: SA45502

Impurities, Topiramate

Topiramate EP impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 950603-46-0

Mol F.

: C25H39NO15S

Mol W.

: 625.6

Cat No.

: SA45503

Impurities, Topiramate

Topiramate EP Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 57-48-7

Mol F.

: C6H12O6

Mol W.

: 180.16

Cat No.

: SA45505

Impurities, Topiramate

Topiramate N-Methyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 97240-80-7

Mol F.

: C13H23NO8S

Mol W.

: 353.39

Cat No.

: SA45509

Impurities, Tramadol

Tramadol EP Impurity A (HCl salt)

Please enquire for price & pack size

Out of Stock

CAS No.

: 73806-49-2 (HCl salt)

Mol F.

: C16H25NO2. HCl

Mol W.

: 263.38 : 36.46

Cat No.

: SA49701

Impurities, Tramadol

Tramadol EP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 73825-64-6 (free base)

Mol F.

: C16H23NO

Mol W.

: 245.37

Cat No.

: SA49702

Impurities, Tramadol

Tramadol EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 192384-41-1 (free base)

Mol F.

: C16H23NO

Mol W.

: 245.36

Cat No.

: SA49703

Impurities, Tramadol

Tramadol EP Impurity E (HCl)

Please enquire for price & pack size

Out of Stock

CAS No.

: 42036-65-7

Mol F.

: C9H17NO. HCl

Mol W.

: 155.24 36.46

Cat No.

: SA49705

Impurities, Tramadol

Tramadol HCl

Please enquire for price & pack size

Out of Stock

CAS No.

: 36282-47-0

Mol F.

: C16H25NO2. HCl

Mol W.

: 263.4 : 36.5

Cat No.

: SA49700

Impurities, Tramadol

Tramadol N-Oxide

Please enquire for price & pack size

Out of Stock

CAS No.

: 147441-56-3

Mol F.

: C16H25NO3

Mol W.

: 279.38

Cat No.

: SA49706

Impurities, Trandolapril

Trandolapril EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 118194-41-5

Mol F.

: C23H32N2O5

Mol W.

: 416.5

Cat No.

: SA13601

Impurities, Trandolapril

Trandolapril EP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C25H36N2O5

Mol W.

: 444.56

Cat No.

: SA13603

Impurities, Trandolapril

Trandolapril EP Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 87679-71-8

Mol F.

: C22H30N2O5

Mol W.

: 402.48

Cat No.

: SA13602

Impurities, Tranexamic Acid

Tranexamic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 1197-18-8

Mol F.

: C8H15NO2

Mol W.

: 157.21

Cat No.

: SA17400

Impurities, Tranexamic Acid

Tranexamic Acid EP Impurity B

$195.00 50 mg

Out of Stock

CAS No.

: 1197-17-7

Mol F.

: C8H15NO2

Mol W.

: 157.2

Cat No.

: SA17402

Impurities, Tranexamic Acid

Tranexamic Acid EP Impurity C

$195.00 50 mg

Out of Stock

CAS No.

: 330838-52-3

Mol F.

: C8H13NO2

Mol W.

: 155.2

Cat No.

: SA17403

Impurities, Tranexamic Acid

Tranexamic Acid EP Impurity D

$95.00 25 mg

Out of Stock

CAS No.

: 56-91-7

Mol F.

: C8H9NO2

Mol W.

: 151.2

Cat No.

: SA17404

Impurities, Tranexamic Acid

Tranexamic Acid Methyl Ester

$95.00 25 mg

Out of Stock

CAS No.

: 29275-88-5 (HCl) ; 50738-63-1 (Base)

Mol F.

: C9H17NO2

Mol W.

: 171.24

Cat No.

: SA17407

Impurities, Tranexamic Acid

Tranexamic Acid Racemate

$95.00 25 mg

Out of Stock

CAS No.

: 701-54-2

Mol F.

: C8H15NO2

Mol W.

: 157.21

Cat No.

: SA17408

Cariprazine, Impurities

trans-1-(Boc-amino)-4-(2-hydroxyethyl)cyclohexane

Please enquire for price & pack size

Out of Stock

CAS No.

: 917342-29-1

Mol F.

: CƒH‚…NOƒ

Mol W.

: 243.34

Cat No.

: SA39701

Cariprazine, Impurities

trans-2-[4-[(tert-Butoxycarbonyl)amino]cyclohexyl]acetic Acid Methyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

: 215789-45-0

Mol F.

: C„H‚…NO„

Mol W.

: 271.35

Cat No.

: SA39702

Impurities, Tolterodine

Trans-cinnamic acid tolterodine impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 140-10-3

Mol F.

: C9H8O2

Mol W.

: 148.18

Cat No.

: SA28207

Emtricitabine, Impurities

trans-L-Menthol-5-(acetyloxy)-1,3-oxathiolane-2-carboxylate

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C₁₆H₂₆O₅S

Mol W.

: 330.44

Cat No.

: SA22911

Impurities, Trazodone

Trazodone

Please enquire for price & pack size

Out of Stock

CAS No.

: 25332-39-2

Mol F.

: C19H23Cl2N5O

Mol W.

: 408.32

Cat No.

: SA30300

Impurities, Trazodone

Trazodone 1,4-Di-N-Oxide

Please enquire for price & pack size

Out of Stock

CAS No.

: 1346603-99-3(base)

Mol F.

: C₁₉H₂₂ClN₅O₃

Mol W.

: 403.86

Cat No.

: SA30309

Impurities, Trazodone

Trazodone 4-Chloro Analog

Please enquire for price & pack size

Out of Stock

CAS No.

: 1263278-77-8

Mol F.

: C₁₉H₂₃Cl₂N₅O

Mol W.

: 408.32

Cat No.

: SA30303

Impurities, Trazodone

Trazodone 4-Ethyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 1346599-35-6(base)

Mol F.

: C₂₁H₂₆ClN₅O

Mol W.

: 436.38

Cat No.

: SA30305

Impurities, Trazodone

Trazodone Bromo Analog

Please enquire for price & pack size

Out of Stock

CAS No.

: 1263278-80-3

Mol F.

: C19H23BrClN5O

Mol W.

: 452.78

Cat No.

: SA30304

Impurities, Trazodone

Trazodone Deschloro Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 62337-66-0

Mol F.

: C19H23N5O

Mol W.

: 337.42

Cat No.

: SA30302

Impurities, Trazodone

Trazodone Isobutyl Ether Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 2470441-00-8

Mol F.

: C17H29Cl3N2O

Mol W.

: 383.78

Cat No.

: SA30307

Impurities, Trazodone

Trazodone N1-Oxide

Please enquire for price & pack size

Out of Stock

CAS No.

: 55290-68-1

Mol F.

: C₁₉H₂₂ClN₅O₂

Mol W.

: 387.86

Cat No.

: SA30301

Impurities, Trazodone

Trazodone USP Related Compound F

Please enquire for price & pack size

Out of Stock

CAS No.

: 52605-52-4

Mol F.

: C13H19Cl3N2

Mol W.

: 309.66000000000003

Cat No.

: SA30306

Aspirin, Impurities

Tri-Salicylic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 85531-17-5

Mol F.

: C21H14O7

Mol W.

: 378.33

Cat No.

: SA28510

Impurities, Triamcinolone Acetonide

Triamcinolone 16,21-Diacetate

$295.00 25 mg

Out of Stock

CAS No.

: 67-78-7

Mol F.

: C₂₅H₃₁FO₈

Mol W.

: 478.51

Cat No.

: SA30207

Impurities, Triamcinolone Acetonide

Triamcinolone Acetonide

Please enquire for price & pack size

Out of Stock

CAS No.

: 76-25-5

Mol F.

: C₂₄H₃₁FO₆

Mol W.

: 434.5

Cat No.

: SA30200

Impurities, Triamcinolone Acetonide

Triamcinolone Acetonide EP Impurity A

$95.00 25 mg

Out of Stock

CAS No.

: 124-94-7

Mol F.

: C21H27FO6

Mol W.

: 394.43

Cat No.

: SA30201