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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, Tolterodine

Tolterodine EP Impurity E

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CAS No.

: 480432-14-2

Mol F.

: C19H25NO

Mol W.

: 283.41000000000003

Cat No.

: SA28203

Impurities, Tolterodine

Tolterodine EP Impurity F

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CAS No.

: 124937-54-8

Mol F.

: C22H31NO

Mol W.

: 325.49

Cat No.

: SA28204

Impurities, Tolterodine

Tolterodine EP Impurity G

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CAS No.

: NA

Mol F.

: C22H31NO2

Mol W.

: 341.49

Cat No.

: SA28205

Impurities, Tolterodine

Tolterodine lactol impurity

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CAS No.

: 209747-04-6

Mol F.

: C16H16O2

Mol W.

: 240.3

Cat No.

: SA28210

Impurities, Tolterodine

Tolterodine lactone impurity

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CAS No.

: 40546-94-9

Mol F.

: C16H14O2

Mol W.

: 238.28

Cat No.

: SA28211

Impurities, Tolterodine

Tolterodine Methoxy Propylamine Impurity Racemate

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CAS No.

: 1017224-71-3

Mol F.

: C17H21NO

Mol W.

: 255.35

Cat No.

: SA28215

Impurities, Tolvaptan

Tolvaptan

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CAS No.

: 150683-30-0

Mol F.

: C26H25ClN2O3

Mol W.

: 448.94

Cat No.

: SA44800

Impurities, Tolvaptan

Tolvaptan (R)-Isomer Impurity

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CAS No.

: 331947-66-1

Mol F.

: C26H25ClN2O3

Mol W.

: 448.94

Cat No.

: SA44807

Impurities, Tolvaptan

Tolvaptan (S)-Isomer Impurity

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CAS No.

: 331947-44-5

Mol F.

: C26H25ClN2O3

Mol W.

: 448.94

Cat No.

: SA44808

Impurities, Tolvaptan

Tolvaptan 4-Bromo 5-Oxo Impurity

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CAS No.

Mol F.

: C26H22BrClN2O3

Mol W.

: 525.82

Cat No.

: SA44809

Impurities, Tolvaptan

Tolvaptan 4-Hydroxy Impurity

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CAS No.

Mol F.

: C26H25ClN2O4

Mol W.

: 464.94

Cat No.

: SA44810

Impurities, Tolvaptan

Tolvaptan 5-Oxo Analog Impurity

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CAS No.

: 137973-76-3

Mol F.

: C26H23ClN2O3

Mol W.

: 446.93

Cat No.

: SA44801

Impurities, Tolvaptan

Tolvaptan 7-Bromo Analog Impurity

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CAS No.

: NA

Mol F.

: C26H25BrN2O3

Mol W.

: 493.39

Cat No.

: SA44803

Impurities, Tolvaptan

Tolvaptan 7-Deschloro Impurity

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CAS No.

: 1432725-23-9

Mol F.

: C26H26N2O3

Mol W.

: 414.5

Cat No.

: SA44802

Impurities, Tolvaptan

Tolvaptan Acetate 5-Oxo Analog Impurity

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CAS No.

Mol F.

: C28H25ClN2O5

Mol W.

: 504.96

Cat No.

: SA44804

Impurities, Tolvaptan

Tolvaptan Hydroxybutanoic Acid Impurity

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CAS No.

: 1346599-75-4

Mol F.

: C26H25ClN2O5

Mol W.

: 480.94

Cat No.

: SA44805

Impurities, Tolvaptan

Tolvaptan Oxobutanoic Acid Impurity

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CAS No.

: 1346599-56-1

Mol F.

: C26H23ClN2O5

Mol W.

: 478.92

Cat No.

: SA44806

Impurities, Topiramate

Topiramate

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CAS No.

: 97240-79-4

Mol F.

: C12H21NO8S

Mol W.

: 339.36

Cat No.

: SA45500

Impurities, Topiramate

Topiramate Azidosulfate Impurity

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CAS No.

: 106881-35-0

Mol F.

: C12H19N3O8S

Mol W.

: 365.36

Cat No.

: SA45516

Impurities, Topiramate

Topiramate Chlorosulfonyl Impurity

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CAS No.

: 150609-95-3

Mol F.

: C12H19ClO8S

Mol W.

: 358.79

Cat No.

: SA45508

Impurities, Topiramate

Topiramate Di-desisopropylidene Impurity

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CAS No.

: 106881-42-9

Mol F.

: C6H13NO8S

Mol W.

: 259.23

Cat No.

: SA45506

Impurities, Topiramate

Topiramate EP Impurity A

$175.00 50 mg

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CAS No.

: 20880-92-6

Mol F.

: C12H20O6

Mol W.

: 260.27

Cat No.

: SA45504

Impurities, Topiramate

Topiramate EP impurity B

$1,555.00 1 g

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CAS No.

: 876403-98-4

Mol F.

: C17H30N2O9S

Mol W.

: 438.49

Cat No.

: SA45501

Impurities, Topiramate

Topiramate EP impurity C

$2,555.00 1 g

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CAS No.

: 106881-41-8

Mol F.

: C9H17NO8S

Mol W.

: 299.3

Cat No.

: SA45502

Impurities, Topiramate

Topiramate EP impurity D

$2,995.00 1 g

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CAS No.

: 950603-46-0

Mol F.

: C25H39NO15S

Mol W.

: 625.6

Cat No.

: SA45503

Impurities, Topiramate

Topiramate EP Impurity E

$195.00 1 g

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CAS No.

: 57-48-7

Mol F.

: C6H12O6

Mol W.

: 180.16

Cat No.

: SA45505

Impurities, Topiramate

Topiramate N-Methyl Impurity

$1,995.00 250 mg

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CAS No.

: 97240-80-7

Mol F.

: C13H23NO8S

Mol W.

: 353.39

Cat No.

: SA45509

Impurities, Tramadol

Tramadol EP Impurity A (HCl salt)

$1,995.00 250 mg

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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

$1,995.00 250 mg

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CAS No.

: 73825-64-6 (free base)

Mol F.

: C16H23NO

Mol W.

: 245.37

Cat No.

: SA49702

Impurities, Tramadol

Tramadol EP Impurity C

$2,555.00 250 mg

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CAS No.

: 192384-41-1 (free base)

Mol F.

: C16H23NO

Mol W.

: 245.36

Cat No.

: SA49703

Impurities, Tramadol

Tramadol EP Impurity E (HCl)

$195.00 1 g

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CAS No.

: 42036-65-7

Mol F.

: C9H17NO. HCl

Mol W.

: 155.24 36.46

Cat No.

: SA49705

Impurities, Tramadol

Tramadol HCl

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CAS No.

: 36282-47-0

Mol F.

: C16H25NO2. HCl

Mol W.

: 263.4 : 36.5

Cat No.

: SA49700

Impurities, Tramadol

Tramadol N-Oxide

$655.00 100 mg

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CAS No.

: 147441-56-3

Mol F.

: C16H25NO3

Mol W.

: 279.38

Cat No.

: SA49706

Impurities, Trandolapril

Trandolapril EP Impurity A

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CAS No.

: 118194-41-5

Mol F.

: C23H32N2O5

Mol W.

: 416.5

Cat No.

: SA13601

Impurities, Trandolapril

Trandolapril EP Impurity B

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CAS No.

: NA

Mol F.

: C25H36N2O5

Mol W.

: 444.56

Cat No.

: SA13603

Impurities, Trandolapril

Trandolapril EP Impurity E

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CAS No.

: 87679-71-8

Mol F.

: C22H30N2O5

Mol W.

: 402.48

Cat No.

: SA13602

Impurities, Tranexamic Acid

Tranexamic Acid

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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

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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

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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

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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

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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

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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

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CAS No.

: 917342-29-1

Mol F.

: C13H25NO3

Mol W.

: 243.34

Cat No.

: SA39701

Cariprazine, Impurities

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

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CAS No.

: 215789-45-0

Mol F.

: C14H25NO4

Mol W.

: 271.35

Cat No.

: SA39702

Impurities, Tolterodine

Trans-cinnamic acid tolterodine impurity

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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

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CAS No.

: NA

Mol F.

: C₁₆H₂₆O₅S

Mol W.

: 330.44

Cat No.

: SA22911

Impurities, Trazodone

Trazodone

$155.00 100 mg

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CAS No.

: 25332-39-2

Mol F.

: C19H23Cl2N5O

Mol W.

: 408.32

Cat No.

: SA30300

Impurities, Trazodone

Trazodone 1,4-Di-N-Oxide

$1,555.00 100 mg

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CAS No.

: 1346603-99-3(base)

Mol F.

: C₁₉H₂₂ClN₅O₃

Mol W.

: 403.86

Cat No.

: SA30309

Impurities, Trazodone

Trazodone 4-Chloro Analog

$995.00 250 mg

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CAS No.

: 1263278-77-8

Mol F.

: C₁₉H₂₃Cl₂N₅O

Mol W.

: 408.32

Cat No.

: SA30303

Impurities, Trazodone

Trazodone 4-Ethyl Impurity

$1,595.00 500 mg

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CAS No.

: 1346599-35-6(base)

Mol F.

: C21H26ClN5O

Mol W.

: 436.38

Cat No.

: SA30305