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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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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

Impurities, Trimetazidine

Trimetazidine EP Impurity F

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CAS No.

: 113698-83-2

Mol F.

: C14H22N2O3

Mol W.

: 266.33999999999997

Cat No.

: SA35106

Impurities, Trimetazidine

Trimetazidine EP Impurity G

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CAS No.

: 110-85-0

Mol F.

: C4H10N2

Mol W.

: 86.14

Cat No.

: SA35107

Impurities, Trimetazidine

Trimetazidine EP Impurity H

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CAS No.

: 53531-01-4

Mol F.

: C17H26N2O5

Mol W.

: 338.4

Cat No.

: SA35108

Impurities, Trimetazidine

Trimetazidine EP Impurity I

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CAS No.

: 53960-20-6

Mol F.

: C15H24N2O3

Mol W.

: 280.36

Cat No.

: SA35109

Impurities, Trimethoprim

Trimethoprim

$95.00 25 mg

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CAS No.

: 738-70-5

Mol F.

: C14H18N4O3

Mol W.

: 290.32

Cat No.

: SA27100

Impurities, Trimethoprim

Trimethoprim EP Impurity E

$175.00 25 mg

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CAS No.

: 60729-91-1

Mol F.

: C14H17N3O4

Mol W.

: 291.3

Cat No.

: SA27105

Impurities, Trimethoprim

Trimethoprim EP Impurity K

$75.00 25 mg

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CAS No.

: 62-53-3

Mol F.

: C6H7N

Mol W.

: 93.13

Cat No.

: SA27111

Hydrocortisone Valerate, Impurities

Trimethyl Ortho Valerate

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CAS No.

: 13820-09-2

Mol F.

: C8H18O3

Mol W.

: 162.22999999999999

Cat No.

: SA27316

Impurities, Olmesartan Medoxomil

Trityl Olmesartan Acid (N2)

$175.00 25 mg

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CAS No.

: 752179-89-8

Mol F.

: C43H40N6O3

Mol W.

: 688.82

Cat No.

: SA17728

Impurities, Tiotropium

Trop-6-ene-3endo-ol

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CAS No.

: 20513-09-1

Mol F.

: C8H13NO

Mol W.

: 139.19

Cat No.

: SA11722

Atropine, Impurities

Tropinone

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CAS No.

: 532-24-1

Mol F.

: C8H13NO

Mol W.

: 139.19

Cat No.

: SA47709

Impurities, Trospium

Trospium Chloride

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CAS No.

: 10405-02-4

Mol F.

: C25H30ClNO3

Mol W.

: 427.96

Cat No.

: SA17302

Impurities, Trospium

Trospium Chloride EP Impurity B

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CAS No.

: 63516-30-3

Mol F.

: C21H24ClNO3

Mol W.

: 373.87

Cat No.

: SA17306

Impurities, Trospium

Trospium Impurity B

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CAS No.

: 16444-19-2

Mol F.

: C₂₁H₂₃NO₃

Mol W.

: 337.41

Cat No.

: SA17304

Impurities, Trospium

Trospium Impurity C

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CAS No.

: 3464-71-9

Mol F.

: C₁₁H₂₀ClNO

Mol W.

: 217.74

Cat No.

: SA17305

Impurities, Trospium

Trospium Impurity D

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CAS No.

: 467-32-3

Mol F.

: C28H20O4

Mol W.

: 420.46

Cat No.

: SA17301

Impurities, Terbutaline

Tulobuterol

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CAS No.

: 41570-61-0

Mol F.

: C₁₂H₁₈ClNO

Mol W.

: 227.73

Cat No.

: SA29009

Impurities, Nitrosamine, Tulobuterol

Tulobuterol Nitroso Impurity

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CAS No.

Mol F.

: C12H17ClN2O2

Mol W.

: 256.73

Cat No.

: SA44692

Impurities, Ulipristal

Ulipristal

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CAS No.

: 159811-51-5

Mol F.

: C28H35NO3

Mol W.

: 433.58

Cat No.

: SA27900

Impurities, Ulipristal

Ulipristal Acetate

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CAS No.

: 126784-99-4

Mol F.

: C30H37NO4

Mol W.

: 475.62

Cat No.

: SA27901

Impurities, Indacaterol

Unknown Impurity at RRT 0.96

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CAS No.

: NA

Mol F.

: C18H14ClNO3

Mol W.

: 327.76

Cat No.

: SA48708

Impurities, Upadacitinib

Upadacitinib (3R, 4R) Diastereomer Impurity

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CAS No.

: NA

Mol F.

: C17H19F3N6O

Mol W.

: 380.4

Cat No.

: SA52405

Impurities, Upadacitinib

Upadacitinib (3R,4R) 2-bromoacetyl ethylpyrrolidine Impurity

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CAS No.

: NA

Mol F.

: C16H20BrNO3

Mol W.

: 354.2

Cat No.

: SA52420

Impurities, Upadacitinib

Upadacitinib (3R,4R) acetyl ethylpyrrolidine Impurity

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CAS No.

: NA

Mol F.

: C16H21NO3

Mol W.

: 275.3

Cat No.

: SA52428

Impurities, Upadacitinib

Upadacitinib (3R,4S) 2-bromoacetyl ethylpyrrolidine Impurity | CAS : 1428243-26-8

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CAS No.

: 1428243-26-8

Mol F.

: C16H20BrNO3

Mol W.

: 354.2

Cat No.

: SA52410

Impurities, Upadacitinib

Upadacitinib (3R,4S) 2-chloroacetyl ethylpyrrolidine Impurity

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CAS No.

: 2460133-49-5

Mol F.

: C16H20ClNO3

Mol W.

: 309.8

Cat No.

: SA52407

Impurities, Upadacitinib

Upadacitinib (3R,4S) acetyl ethylpyrrolidine Impurity | CAS : 2411540-29-7

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CAS No.

: 2411540-29-7

Mol F.

: C16H21NO3

Mol W.

: 275.3

Cat No.

: SA52427

Impurities, Upadacitinib

Upadacitinib (3S, 4S) Diastereomer Impurity

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CAS No.

: NA

Mol F.

: C17H19F3N6O

Mol W.

: 380.4

Cat No.

: SA52404

Impurities, Upadacitinib

Upadacitinib (3S,4R) 2-bromoacetyl ethylpyrrolidine Impurity

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CAS No.

: 2304514-69-8

Mol F.

: C16H20BrNO3

Mol W.

: 354.2

Cat No.

: SA52406

Impurities, Upadacitinib

Upadacitinib (3S,4S) 2-bromoacetyl ethylpyrrolidine Impurity | CAS : 2868258-96-0

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CAS No.

: 2868258-96-0

Mol F.

: C16H20BrNO3

Mol W.

: 354.2

Cat No.

: SA52411

Impurities, Upadacitinib

Upadacitinib API | CAS : 1310726-60-3

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CAS No.

: 1310726-60-3

Mol F.

: C17H19F3N6O

Mol W.

: 380.37

Cat No.

: SA52400

Impurities, Upadacitinib

Upadacitinib Bis (2,2,2-trifluoroethyl)dicarboxamide Impurity | CAS : 2715120-86-6

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CAS No.

: 2715120-86-6

Mol F.

: C20H21F6N7O2

Mol W.

: 505.4

Cat No.

: SA52409