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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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Bimatoprost

Bimatoprost Acid 15-Epi Methyl Ester

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CAS No.

: 122675-28-9

Mol F.

: C24H34O5

Mol W.

: 402.5

Cat No.

: SA62105

Bimatoprost

Bimatoprost Acid Methyl Ester

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CAS No.

: 38315-47-8

Mol F.

: C24H34O5

Mol W.

: 402.5

Cat No.

: SA62106

Bimatoprost

Bimatoprost Cyclohexyl Amide

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CAS No.

: NA

Mol F.

: C29H43NO4

Mol W.

: 469.7

Cat No.

: SA62111

Bimatoprost

Bimatoprost Methyl Ester

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CAS No.

: NA

Mol F.

: C24H36O5

Mol W.

: 404.5

Cat No.

: SA62112

Bimatoprost

Bimatoprost USP Related Compound A

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CAS No.

: 1163135-95-2

Mol F.

: C25H37NO4

Mol W.

: 415.6

Cat No.

: SA62107

Binimetinib, Impurities

Binimetinib

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CAS No.

: 606143-89-9

Mol F.

: C17H15BrF2N4O3

Mol W.

: 441.2

Cat No.

: SA61401

Binimetinib, Impurities

Binimetinib Acid Impurity

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CAS No.

: 1415564-99-6

Mol F.

: C15H10BrF2N3O2

Mol W.

: 382.2

Cat No.

: SA61402

Binimetinib, Impurities, Nitrosamine Impurity Standards

Binimetinib Acid Nitroso Impurity

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CAS No.

: NA

Mol F.

: C15H9BrF2N4O3

Mol W.

: 411.2

Cat No.

: SA61400

Binimetinib, Impurities

Binimetinib Amide Impurity

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CAS No.

: 1604812-70-5

Mol F.

: C21H23BrF2N4O3

Mol W.

: 497.3

Cat No.

: SA61403

Binimetinib, Impurities

Binimetinib Cyclized Impurity

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CAS No.

: NA

Mol F.

: C21H23BrF2N4O4

Mol W.

: 513.3

Cat No.

: SA61404

Binimetinib, Impurities

Binimetinib Des Bromo Acid Impurity

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CAS No.

: 2649854-87-3

Mol F.

: C15H11F2N3O2

Mol W.

: 303.3

Cat No.

: SA61408

Binimetinib, Impurities

Binimetinib Des Bromo Impurity

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CAS No.

: NA

Mol F.

: C17H16F2N4O3

Mol W.

: 362.3

Cat No.

: SA61409

Binimetinib, Impurities

Binimetinib Des Bromo Vinyloxy Impurity

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CAS No.

: 2649854-88-4

Mol F.

: C19H18F2N4O3

Mol W.

: 388.4

Cat No.

: SA61405

Binimetinib, Impurities

Binimetinib Ethyl Ether Impurity

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CAS No.

: NA

Mol F.

: C19H19BrF2N4O3

Mol W.

: 469.3

Cat No.

: SA61406

Binimetinib, Impurities

Binimetinib methyl ester impurity

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CAS No.

: 1415559-93-1

Mol F.

: C16H12BrF2N3O2

Mol W.

: 396.2

Cat No.

: SA61407

Binimetinib, Impurities, Nitrosamine Impurity Standards

Binimetinib Methyl Ester Nitroso Impurity

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CAS No.

: NA

Mol F.

: C16H11BrF2N4O3

Mol W.

: 425.2

Cat No.

: SA61411

Binimetinib, Impurities, Nitrosamine Impurity Standards

Binimetinib Nitroso Amide Impurity

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CAS No.

: NA

Mol F.

: C21H22BrF2N5O4

Mol W.

: 526.3

Cat No.

: SA61413

Biperiden

Biperiden EP Impurity B

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CAS No.

: NA

Mol F.

: C21H29NO

Mol W.

: 311.22

Cat No.

: SA60801

Biperiden

Biperiden EP Impurity C

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CAS No.

: NA

Mol F.

: C21H29NO

Mol W.

: 311.5

Cat No.

: SA60802

Biperiden

Biperiden EP Impurity D

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CAS No.

: 93778-71-3; 93778-70-2 (HCl Salt)

Mol F.

: C15H23NO

Mol W.

: 233.36

Cat No.

: SA60800

Biperiden

Biperiden Ketone Impurity

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CAS No.

: 2832847-11-5

Mol F.

: C15H23NO

Mol W.

: 233.4

Cat No.

: SA60803

Aciclovir, Impurities

Bis [Acetyl 2-[(2-Formamide-1,6-dihydro-6-chloro-9H-purin-9yl)methoxy]ethyl Ester]

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CAS No.

: 1346600-44-9

Mol F.

: C23H24Cl2N10O8

Mol W.

: 639.4

Cat No.

: SA21429

Impurities, Iopamidol

Bis Dimethylamino Iopamidol

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CAS No.

: NA

Mol F.

: C15H18I3N3O4

Mol W.

: 685.0

Cat No.

: SA67802

Atomoxetine, Impurities

Bis-(2-benzoylethyl)ether (Atomoxetine Impurity)

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CAS No.

: NA

Mol F.

: C18H18O3

Mol W.

: 282.33

Cat No.

: SA22116

Impurities, Sitagliptin

Bis-benzyl Sitagliptin Maleate Adduct

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CAS No.

Mol F.

: C34H29F6N5O5

Mol W.

: 701.64

Cat No.

: SA10427

Impurities, Methylphenidate

Bis-Methylphenidate

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CAS No.

: 2125941-27-5

Mol F.

: C23H27NO4

Mol W.

: 381.5

Cat No.

: SA40100

Impurities, Pregabalin

Bis-t-butyldimethylsilyl 6,6’-Dihydroxypregabalin Lactam

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CAS No.

Mol F.

: C20H43NO3SiO2

Mol W.

: 401.73

Cat No.

: SA24811

Dapsone, Impurities

Bis(2-aminophenyl) Sulfone

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CAS No.

: 53347-49-2

Mol F.

: C12H12N2O2S

Mol W.

: 248.3

Cat No.

: SA27015

Dapsone, Impurities

Bis(2-nitrophenyl) Sulfide

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CAS No.

: 22100-66-9

Mol F.

: C12H8N2O4S

Mol W.

: 276.27

Cat No.

: SA27013

Dapsone, Impurities

Bis(2-nitrophenyl) Sulfone

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CAS No.

: 14665-52-2

Mol F.

: C12H8N2O6S

Mol W.

: 308.27

Cat No.

: SA27014

Impurities, Tiagabine

Bis(3-methylthien-2-yl)methanone

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CAS No.

: 30717-55-6

Mol F.

: C₁₁H₁₀OS₂

Mol W.

: 222.33

Cat No.

: SA10504

Dapsone, Impurities

Bis(4-hydroxyphenyl) Sulfone

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CAS No.

: 80-09-1

Mol F.

: C12H10O4S

Mol W.

: 250.27

Cat No.

: SA27017

Impurities, Pioglitazone

Bis(ethylpyridyl) Pioglitazone Analog | CAS : 1147527-36-3

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CAS No.

: 1147527-36-3

Mol F.

: C28H29N3O3S

Mol W.

: 487.6

Cat No.

: SA52805

Impurities, Ranitidine

Bis(methylthio)-2-nitroethylene

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CAS No.

: 13623-94-4

Mol F.

: C4H7NO2S2

Mol W.

: 165.23

Cat No.

: SA26516

Lisdexamfetamine

Bis(tert-Butoxycarbonyl) Lisdexamphetamine

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CAS No.

: 819871-13-1

Mol F.

: C25H41N3O5

Mol W.

: 463.6

Cat No.

: SA70001

Bisacodyl, Impurities

Bisacodyl

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CAS No.

: 603-50-9

Mol F.

: C22H19NO4

Mol W.

: 361.39

Cat No.

: SA36400

Bisacodyl, Impurities

Bisacodyl EP Impurity A

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CAS No.

: 603-41-8

Mol F.

: C18H15NO2

Mol W.

: 277.32

Cat No.

: SA36401

Bisacodyl, Impurities

Bisacodyl EP Impurity B

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CAS No.

: 16985-05-0

Mol F.

: C18H15NO2

Mol W.

: 277.32

Cat No.

: SA36402

Bisacodyl, Impurities

Bisacodyl EP Impurity C

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CAS No.

: 72901-16-7

Mol F.

: C20H17NO3

Mol W.

: 319.35

Cat No.

: SA36403

Bisacodyl, Impurities

Bisacodyl EP Impurity E

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CAS No.

: 111664-35-8

Mol F.

: C22H19NO4

Mol W.

: 361.39

Cat No.

: SA36404

Bisoprolol, Impurities

Bisoprolol Alcohol Impurity

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CAS No.

: 623-05-2

Mol F.

: C7H8O2

Mol W.

: 124.14

Cat No.

: SA35616

Bisoprolol, Impurities

Bisoprolol EP Impurity E

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CAS No.

: 1217245-60-7

Mol F.

: C18H29NO3

Mol W.

: 307.43

Cat No.

: SA35605

Bisoprolol, Impurities

Bisoprolol EP Impurity F

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CAS No.

: 1798418-82-2(Base)

Mol F.

: C18H31NO4

Mol W.

: 325.44

Cat No.

: SA35606

Bisoprolol, Impurities

Bisoprolol EP Impurity G

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CAS No.

: 1215342-36-1

Mol F.

: C19H33NO5

Mol W.

: 355.47

Cat No.

: SA35607

Bisoprolol, Impurities

Bisoprolol EP Impurity J

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CAS No.

: 1797024-50-0

Mol F.

: C15H24O5

Mol W.

: 284.35

Cat No.

: SA35608

Bisoprolol, Impurities

Bisoprolol EP Impurity S

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CAS No.

: 123-08-0

Mol F.

: C7H6O2

Mol W.

: 122.12

Cat No.

: SA35615

Bisoprolol, Impurities

Bisoprolol N-Aldehyde

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CAS No.

: 1447715-45-8

Mol F.

: C19H31NO5

Mol W.

: 353.45

Cat No.

: SA35620

Bisoprolol, Impurities

Bisoprolol N-Isopropanoic Acid

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CAS No.

: NA

Mol F.

: C21H35NO6

Mol W.

: 397.5

Cat No.

: SA35621

Edaravone

Bispyrazolone

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CAS No.

: 7477-67-0

Mol F.

: C20H18N4O2

Mol W.

: 346.4

Cat No.

: SA64403

Impurities, Pyridoxine

Bispyridoxine

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CAS No.

: 19203-56-6

Mol F.

: C16H20N2O5

Mol W.

: 320.4

Cat No.

: SA75501