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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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Betamethasone, Impurities

Betamethasone EP Impurity J

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CAS No.

: 18383-24-9

Mol F.

: C22H30O4

Mol W.

: 358.47

Cat No.

: SA26610

Betamethasone Valerate, Impurities

Betamethasone Valerate

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CAS No.

: 2152-44-5

Mol F.

: C27H37FO6

Mol W.

: 476.58

Cat No.

: SA18508

Betamethasone Valerate, Impurities

Betamethasone Valerate EP Impurity G

$455.00 25 mg

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CAS No.

Mol F.

: C27H36BrFO6

Mol W.

: 555.47

Cat No.

: SA18503

Betamethasone, Impurities

Betamethasone-21-Acetal

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CAS No.

: 1184871-60-0

Mol F.

: C44H56F2O11

Mol W.

: 798.91

Cat No.

: SA26615

Bicalutamide, Impurities

Bicalutamide

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CAS No.

: 90357-06-5

Mol F.

: C18H14F4N2O4S

Mol W.

: 430.38

Cat No.

: SA35300

Bicalutamide, Impurities

Bicalutamide EP Impurity A

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CAS No.

: 90357-05-4

Mol F.

: C18H15F3N2O4S

Mol W.

: 412.38

Cat No.

: SA35301

Bicalutamide, Impurities

Bicalutamide EP Impurity B

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CAS No.

: 1159977-36-2

Mol F.

: C18H14F4N2O4S

Mol W.

: 430.38

Cat No.

: SA35302

Bicalutamide, Impurities

Bicalutamide EP Impurity C

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CAS No.

: 906008-94-4

Mol F.

: C18H14F4N2O3S

Mol W.

: 414.38

Cat No.

: SA35303

Bicalutamide, Impurities

Bicalutamide EP Impurity D

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CAS No.

: 654-70-6

Mol F.

: C8H5F3N2

Mol W.

: 186.13

Cat No.

: SA35304

Bicalutamide, Impurities

Bicalutamide EP Impurity E

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CAS No.

: NA

Mol F.

: C18H14F4N2O3S

Mol W.

: 414.38

Cat No.

: SA35305

Bicalutamide, Impurities

Bicalutamide EP Impurity F

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CAS No.

: NA

Mol F.

: C18H14F4N2O3S

Mol W.

: 414.38

Cat No.

: SA35306

Bicalutamide, Impurities

Bicalutamide EP Impurity H

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CAS No.

: NA

Mol F.

: C18H14F4N2O4S

Mol W.

: 430.38

Cat No.

: SA35307

Bicalutamide, Impurities

Bicalutamide EP Impurity I

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CAS No.

: NA

Mol F.

: C17H14BrF4NO3S

Mol W.

: 468.26

Cat No.

: SA35308

Bicalutamide, Impurities

Bicalutamide EP Impurity J

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CAS No.

: 90356-78-8

Mol F.

: C18H14F4N2O2S

Mol W.

: 398.38

Cat No.

: SA35309

Bicalutamide, Impurities

Bicalutamide EP Impurity K

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CAS No.

: NA

Mol F.

: C24H20F6N4O6S

Mol W.

: 606.5

Cat No.

: SA35310

Bicalutamide, Impurities

Bicalutamide EP Impurity M

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CAS No.

: 151262-57-6

Mol F.

: C10H11FO5S

Mol W.

: 262.26

Cat No.

: SA35311

Bicalutamide, Impurities

Bicalutamide Glucoronide Impurity

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CAS No.

: NA

Mol F.

: C25H22F6N2O10S

Mol W.

: 656.51

Cat No.

: SA35315

Bicalutamide, Impurities

Bicalutamide Oxirane Impurity

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CAS No.

: 90357-51-0

Mol F.

: C12H9F3N2O2

Mol W.

: 270.21

Cat No.

: SA35314

Bicalutamide, Impurities

Bicalutamide R-Isomer Impurity

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CAS No.

: 113299-40-4

Mol F.

: C18H14F4N2O4S

Mol W.

: 430.38

Cat No.

: SA35312

Bicalutamide, Impurities

Bicalutamide S-Isomer Impurity

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CAS No.

: 113299-38-0

Mol F.

: C18H14F4N2O4S

Mol W.

: 430.38

Cat No.

: SA35313

Bicalutamide, Impurities

Bicalutamide Sulfoxide Impurity

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CAS No.

: 945419-64-7

Mol F.

: C18H14F4N2O3S

Mol W.

: 414.38

Cat No.

: SA35316

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

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

$350.00 25 mg

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CAS No.

Mol F.

: C34H29F6N5O5

Mol W.

: 701.64

Cat No.

: SA10427

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

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

Etoricoxib, Impurities

Bisindolylmaleimide III, Hydrochloride

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CAS No.

: 683775-59-9

Mol F.

: C23H21ClN4O2

Mol W.

: 420.89

Cat No.

: SB10201

Etoricoxib, Impurities

Bisindolylmaleimide IV

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CAS No.

: 119139-23-0

Mol F.

: C20H13N3O2

Mol W.

: 327.34

Cat No.

: SB10203

Etoricoxib, Impurities

Bisindolylmaleimide VIII acetate salt

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CAS No.

: 138516-31-1

Mol F.

: C24H22N4O2

Mol W.

: 398.46

Cat No.

: SB10204

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

Impurities, Saxagliptin

Boc-3-hydroxy-1-adamantyl-D-glycine

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CAS No.

: 361442-00-4

Mol F.

: C17H27NO5

Mol W.

: 325.45999999999998

Cat No.

: SA27400

Bosentan, Impurities

Bosentan

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CAS No.

: 147536-97-8

Mol F.

: C27H29N5O6S

Mol W.

: 551.62

Cat No.

: SA28600

Bosentan, Impurities

Bosentan Acetate

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CAS No.

: 1160515-46-7

Mol F.

: C19H17ClN4O5

Mol W.

: 416.81

Cat No.

: SA28601

Bosentan, Impurities

Bosentan hydroxyethoxy ethyl Impurity

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CAS No.

: 1257099-43-6

Mol F.

: C29H33N5O7S

Mol W.

: 595.67

Cat No.

: SA28608