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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, Topiramate

Topiramate EP Impurity A

$175.00 50 mg

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

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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

PLEASE ENQUIRE

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

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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

Please enquire for price & pack size

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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

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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

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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

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

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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

Please enquire for price & pack size

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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

Please enquire for price & pack size

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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

Please enquire for price & pack size

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CAS No.

: NA

Mol F.

: C₁₆H₂₆O₅S

Mol W.

: 330.44

Cat No.

: SA22911

Impurities, Trazodone

Trazodone

$155.00 100 mg

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

PLEASE ENQUIRE

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

PLEASE ENQUIRE

CAS No.

: 1346599-35-6(base)

Mol F.

: C21H26ClN5O

Mol W.

: 436.38

Cat No.

: SA30305

Impurities, Trazodone

Trazodone Bromo Analog

$995.00 500 mg

PLEASE ENQUIRE

CAS No.

: 1263278-80-3

Mol F.

: C19H23BrClN5O

Mol W.

: 452.78

Cat No.

: SA30304

Impurities, Trazodone

Trazodone Deschloro Impurity

$995.00 250 mg

PLEASE ENQUIRE

CAS No.

: 62337-66-0

Mol F.

: C19H23N5O

Mol W.

: 337.42

Cat No.

: SA30302

Impurities, Trazodone

Trazodone EP Impurity I

Please enquire for price & pack size

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CAS No.

: 32229-98-4

Mol F.

: C13H19ClN2O

Mol W.

: 254.8

Cat No.

: SA30312

Impurities, Trazodone

Trazodone EP Impurity J

Please enquire for price & pack size

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CAS No.

: 1263358-12-8

Mol F.

: C19H21Cl2N5O

Mol W.

: 406.3

Cat No.

: SA30313

Impurities, Trazodone

Trazodone EP Impurity M

Please enquire for price & pack size

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CAS No.

: 157072-18-9

Mol F.

: C19H23ClN5O

Mol W.

: 372.9

Cat No.

: SA30314

Impurities, Trazodone

Trazodone Isobutyl Ether Impurity

$995.00 250 mg

PLEASE ENQUIRE

CAS No.

: 2470441-00-8

Mol F.

: C17H29Cl3N2O

Mol W.

: 383.78

Cat No.

: SA30307

Impurities, Trazodone

Trazodone N1-Oxide

$1,555.00 100 mg

PLEASE ENQUIRE

CAS No.

: 55290-68-1

Mol F.

: C₁₉H₂₂ClN₅O₂

Mol W.

: 387.86

Cat No.

: SA30301

Impurities, Trazodone

Trazodone USP Related Compound F

$195.00 1 g

PLEASE ENQUIRE

CAS No.

: 52605-52-4

Mol F.

: C13H19Cl3N2

Mol W.

: 309.66

Cat No.

: SA30306

Aspirin, Impurities

Tri-Salicylic Acid

Please enquire for price & pack size

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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

PLEASE ENQUIRE

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

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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

PLEASE ENQUIRE

CAS No.

: 124-94-7

Mol F.

: C21H27FO6

Mol W.

: 394.43

Cat No.

: SA30201

Impurities, Triamcinolone Acetonide

Triamcinolone Acetonide EP Impurity C

$295.00 25 mg

PLEASE ENQUIRE

CAS No.

: 161740-69-8

Mol F.

: C24H31FO7

Mol W.

: 450.50

Cat No.

: SA30203

Impurities, Triamcinolone Acetonide

Triamcinolone Acetonide EP Impurity D

$395.00 25 mg

PLEASE ENQUIRE

CAS No.

: 10392-74-2

Mol F.

: C24H31ClO6

Mol W.

: 450.95

Cat No.

: SA30204

Fluocinonide, Impurities

Triamcinolone Acetonide; Fluocinolone Acetonide EP Impurity H

Please enquire for price & pack size

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CAS No.

: 76-25-5

Mol F.

: C24H31FO6

Mol W.

: 434.5

Cat No.

: SA35408

Impurities, Triamcinolone Acetonide

Triamcinolone Hexacetonide

$295.00 25 mg

PLEASE ENQUIRE

CAS No.

: 5611-51-8

Mol F.

: C₃₀H₄₁FO₇

Mol W.

: 532.64

Cat No.

: SA30213

Impurities, Trazodone

Triazolopyridinone

$195.00 1 g

PLEASE ENQUIRE

CAS No.

: 6969-71-7

Mol F.

: C₆H₅N₃O

Mol W.

: 135.12

Cat No.

: SA30310

Sitagliptin

Tridesfluoro benzene diamide Sitagliptin impurity

$1,995.00 100 mg

PLEASE ENQUIRE

CAS No.

Mol F.

: C26H26F6N6O2

Mol W.

: 568.51

Cat No.

: SA10429

Impurities, Trimetazidine

Trimetazidine

$195.00 1 g

PLEASE ENQUIRE

CAS No.

: 13171-25-0

Mol F.

: C14H22N2O3

Mol W.

: 266.34

Cat No.

: SA35100

Impurities, Trimetazidine

Trimetazidine EP Impurity A

$555.00 500 mg

PLEASE ENQUIRE

CAS No.

: 52146-35-7

Mol F.

: C14H22N2O3

Mol W.

: 266.34

Cat No.

: SA35101

Impurities, Trimetazidine

Trimetazidine EP Impurity B

$355.00 100 mg

PLEASE ENQUIRE

CAS No.

: 1257-19-8

Mol F.

: C24H34N2O6

Mol W.

: 446.54

Cat No.

: SA35102