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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 C

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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

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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

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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

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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)

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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

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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

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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)

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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

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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

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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

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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

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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

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CAS No.

: 1346599-35-6(base)

Mol F.

: C₂₁H₂₆ClN₅O

Mol W.

: 436.38

Cat No.

: SA30305

Impurities, Trazodone

Trazodone Bromo Analog

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CAS No.

: 1263278-80-3

Mol F.

: C19H23BrClN5O

Mol W.

: 452.78

Cat No.

: SA30304

Impurities, Trazodone

Trazodone Deschloro Impurity

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CAS No.

: 62337-66-0

Mol F.

: C19H23N5O

Mol W.

: 337.42

Cat No.

: SA30302

Impurities, Trazodone

Trazodone Isobutyl Ether Impurity

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CAS No.

: 2470441-00-8

Mol F.

: C17H29Cl3N2O

Mol W.

: 383.78

Cat No.

: SA30307

Impurities, Trazodone

Trazodone N1-Oxide

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CAS No.

: 55290-68-1

Mol F.

: C₁₉H₂₂ClN₅O₂

Mol W.

: 387.86

Cat No.

: SA30301

Impurities, Trazodone

Trazodone USP Related Compound F

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CAS No.

: 52605-52-4

Mol F.

: C13H19Cl3N2

Mol W.

: 309.66000000000003

Cat No.

: SA30306

Aspirin, Impurities

Tri-Salicylic Acid

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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

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CAS No.

: 67-78-7

Mol F.

: C₂₅H₃₁FO₈

Mol W.

: 478.51

Cat No.

: SA30207

Impurities, Triamcinolone Acetonide

Triamcinolone Acetonide

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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

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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

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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

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CAS No.

: 10392-74-2

Mol F.

: C24H31ClO6

Mol W.

: 450.95

Cat No.

: SA30204

Fluocinonide, Impurities

Triamcinolone Acetonide; Fluocinolone Acetonide EP Impurity H

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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

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CAS No.

: 5611-51-8

Mol F.

: C₃₀H₄₁FO₇

Mol W.

: 532.64

Cat No.

: SA30213

Impurities, Trazodone

Triazolopyridinone

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CAS No.

: 6969-71-7

Mol F.

: C₆H₅N₃O

Mol W.

: 135.12

Cat No.

: SA30310

Impurities, Sitagliptin

Tridesfluoro benzene diamide Sitagliptin impurity

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CAS No.

Mol F.

: C26H26F6N6O2

Mol W.

: 568.51

Cat No.

: SA10429

Impurities, Triflic acid

Triflic acid ethyl ester

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CAS No.

: 425-75-1

Mol F.

: C3H5F3O3S

Mol W.

: 178.13

Cat No.

: SA47602

Impurities, Triflic acid

Triflic acid methyl ester

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CAS No.

: 333-27-7

Mol F.

: C2H3F3O3S

Mol W.

: 164.1

Cat No.

: SA47601

Impurities, Trimetazidine

Trimetazidine

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CAS No.

: 13171-25-0

Mol F.

: C14H22N2O3

Mol W.

: 266.33999999999997

Cat No.

: SA35100

Impurities, Trimetazidine

Trimetazidine EP Impurity A

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CAS No.

: 52146-35-7

Mol F.

: C14H22N2O3

Mol W.

: 266.33999999999997

Cat No.

: SA35101

Impurities, Trimetazidine

Trimetazidine EP Impurity B

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CAS No.

: 1257-19-8

Mol F.

: C24H34N2O6

Mol W.

: 446.54

Cat No.

: SA35102

Impurities, Trimetazidine

Trimetazidine EP Impurity C

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CAS No.

: 2103-57-3

Mol F.

: C10H12O4

Mol W.

: 196.2

Cat No.

: SA35103

Impurities, Trimetazidine

Trimetazidine EP Impurity D

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CAS No.

: 71989-96-3

Mol F.

: C10H14O4

Mol W.

: 198.22

Cat No.

: SA35104

Impurities, Trimetazidine

Trimetazidine EP Impurity E

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CAS No.

: 356083-64-2

Mol F.

: C14H22N2O3

Mol W.

: 266.33999999999997

Cat No.

: SA35105