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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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Azilsartan, Impurities

Azilsartan N-hydroxycarbamimidoyl Amino Benzoate Impurity

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CAS No.

: NA

Mol F.

: C22H22N4O3

Mol W.

: 390.5

Cat No.

: SA42817

Azilsartan, Impurities

Azilsartan N-hydroxycarbamimidoyl Methyl Ester Impurity

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CAS No.

: 147403-65-4

Mol F.

: C25H24N4O4

Mol W.

: 444.5

Cat No.

: SA42816

Azilsartan, Impurities

Azilsartan O-Desethyl Carboxylic Acid Impurity

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CAS No.

: 1442400-68-1

Mol F.

: C23H16N4O5

Mol W.

: 428.4

Cat No.

: SA42815

Azithromycin, Impurities

Azithromycin

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CAS No.

: 117772-70-0

Mol F.

: C38H76N2O14

Mol W.

: 785.02

Cat No.

: SA10300

Azithromycin, Impurities

Azithromycin EP Impurity A

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CAS No.

: 76801-85-9

Mol F.

: C37H70N2O12

Mol W.

: 734.96

Cat No.

: SA10309

Azithromycin, Impurities

Azithromycin EP Impurity B

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CAS No.

: 307974-61-4

Mol F.

: C38H72N2O11

Mol W.

: 732.99

Cat No.

: SA10310

Azithromycin, Impurities

Azithromycin EP Impurity C

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CAS No.

: 620169-47-3

Mol F.

: C37H70N2O12

Mol W.

: 734.96

Cat No.

: SA10311

Azithromycin, Impurities

Azithromycin EP Impurity D

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CAS No.

: 612069-26-8

Mol F.

: C38H72N2O13

Mol W.

: 764.98

Cat No.

: SA10312

Azithromycin, Impurities

Azithromycin EP Impurity K

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CAS No.

: 612534-95-9

Mol F.

: C38H70N2O13

Mol W.

: 762.97

Cat No.

: SA10315

Azithromycin, Impurities

Azithromycin EP Impurity O

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CAS No.

: 763924-54-5

Mol F.

: C39H74N2O12

Mol W.

: 763.01

Cat No.

: SA10308

Azithromycin, Impurities

Azithromycin EP Impurity Q

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CAS No.

: 2095879-65-3

Mol F.

: C44H75N3O15S

Mol W.

: 918.1

Cat No.

: SA10317

Azithromycin, Impurities

Azithromycin Impurity E

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CAS No.

: 612069-27-9

Mol F.

: C36H68N2O12

Mol W.

: 720.93

Cat No.

: SA10301

Azithromycin, Impurities

Azithromycin Impurity F

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CAS No.

: 612069-28-0

Mol F.

: C38H70N2O13

Mol W.

: 762.97

Cat No.

: SA10302

Azithromycin, Impurities

Azithromycin Impurity L

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CAS No.

: 90503-06-3

Mol F.

: C38H72N2O13

Mol W.

: 764.98

Cat No.

: SA10305

Azithromycin, Impurities

Azithromycin Impurity M

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CAS No.

: 765927-71-7

Mol F.

: C37H68N2O13

Mol W.

: 748.94

Cat No.

: SA10306

Azithromycin, Impurities

Azithromycin Impurity N

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CAS No.

: 612069-25-7

Mol F.

: C36H65NO13

Mol W.

: 719.9

Cat No.

: SA10307

Baclofen, Impurities

Baclofen Butylester

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CAS No.

: 114661-63-1; 947583-11-1 (HCl salt)

Mol F.

: C14H20ClNO2

Mol W.

: 269.77

Cat No.

: SA28108

Baclofen, Impurities

Baclofen EP Impurity A

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CAS No.

: 22518-27-0

Mol F.

: C10H10ClNO

Mol W.

: 195.64

Cat No.

: SA28100

Baclofen, Impurities

Baclofen EP Impurity B

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CAS No.

: 1141-23-7

Mol F.

: C11H12ClNO3

Mol W.

: 241.67

Cat No.

: SA28101

Beclomethasone Dipropionate, Impurities

Beclomethasone Dipropionate

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CAS No.

: 5534-09-8

Mol F.

: C28H37ClO7

Mol W.

: 521.06

Cat No.

: SA15601

Benazepril, Impurities

Benazepril EP Impurity D

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CAS No.

: 112110-48-2

Mol F.

: C24H34N2O5

Mol W.

: 430.54

Cat No.

: SA29604

Benazepril, Impurities

Benazepril Tert-butyl (R)-Amino Azepinyl Impurity

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CAS No.

: 115406-14-9

Mol F.

: C16H22N2O3

Mol W.

: 290.4

Cat No.

: SA29614

Bendamustine, Impurities

Bendamustine

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CAS No.

: 16506-27-7

Mol F.

: C16H21Cl2N3O2

Mol W.

: 358.3

Cat No.

: SA54400

Bendamustine, Impurities

Bendamustine USP Related Compound A

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CAS No.

: 109882-30-6

Mol F.

: C16H23N3O4

Mol W.

: 321.4

Cat No.

: SA54401

Bendamustine, Impurities

Bendamustine USP Related Compound B

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CAS No.

: 1228552-02-0

Mol F.

: C16H21N3O3

Mol W.

: 303.4

Cat No.

: SA54402

Bendamustine, Impurities

Bendamustine USP Related Compound C

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CAS No.

: 3543-74-6

Mol F.

: C18H27N3O4

Mol W.

: 349.4

Cat No.

: SA54403

Bendamustine, Impurities

Bendamustine USP Related Compound D

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CAS No.

: 1219709-86-0

Mol F.

: C14H18ClN3O2

Mol W.

: 295.8

Cat No.

: SA54404

Bendamustine, Impurities

Bendamustine USP Related Compound E

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CAS No.

: 109882-26-0

Mol F.

: C16H22ClN3O3

Mol W.

: 339.8

Cat No.

: SA54405

Bendamustine, Impurities

Bendamustine USP Related Compound F

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CAS No.

: 1869075-89-7

Mol F.

: C22H33Cl2N3O7

Mol W.

: 522.4

Cat No.

: SA54406

Bendamustine, Impurities

Bendamustine USP Related Compound G

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CAS No.

: 191939-34-1

Mol F.

: C16H20ClN3O2S

Mol W.

: 353.9

Cat No.

: SA54407

Bendamustine, Impurities

Bendamustine USP Related Compound H

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CAS No.

: 1228551-91-4

Mol F.

: C32H41Cl3N6O4

Mol W.

: 680.1

Cat No.

: SA54408

Bendamustine, Impurities

Bendamustine USP Related Compound I

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CAS No.

: 87475-54-5

Mol F.

: C18H25Cl2N3O2

Mol W.

: 386.3

Cat No.

: SA54409

Impurities, Nitrosamine

Benidipine Nitroso Impurity

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CAS No.

: NA

Mol F.

: C28H30N4O7

Mol W.

: 534.6

Cat No.

: SA44668

Aspirin, Impurities

Benorilate

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CAS No.

: 5003-48-5

Mol F.

: C17H15NO5

Mol W.

: 313.3

Cat No.

: SA28508

Impurities, Varenicline

Benzimidazole Varenicline

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CAS No.

: 357424-12-5

Mol F.

: C12H13N3

Mol W.

: 199.25

Cat No.

: SA39513

Brexpiprazole, Impurities

Benzo[b]thiophene

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CAS No.

: 95-15-8

Mol F.

: C8H6S

Mol W.

: 134.2

Cat No.

: SA41321

Aspirin, Impurities

Benzoic acid

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CAS No.

: 65-85-0

Mol F.

: C7H6O2

Mol W.

: 122.12

Cat No.

: SA28515

Gemcitabine, Impurities

Benzoic acid-(ethoxycarbonyl-difluoro-methyl)-2,3-dihydroxy-propyl ester

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CAS No.

: 122111-10-8

Mol F.

: C14H16F2O6

Mol W.

: 318.3

Cat No.

: SA44505

Atropine, Impurities

Benzoyltropein

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CAS No.

: 16052-34-9

Mol F.

: C15H19NO2

Mol W.

: 245.32

Cat No.

: SA47711

Benzydamine, Impurities

Benzydamine

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CAS No.

: 642-72-8

Mol F.

: C19H23N3O : HCl

Mol W.

: 309.4

Cat No.

: SA54600

Benzydamine, Impurities

Benzydamine EP Impurity A

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CAS No.

: 87453-76-7

Mol F.

: C19H24N2O2

Mol W.

: 312.4

Cat No.

: SA54601

Benzydamine, Impurities

Benzydamine EP Impurity B

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CAS No.

: 1797879-37-8

Mol F.

: C26H29N3O : HCl

Mol W.

: 399.5

Cat No.

: SA54602

Benzydamine, Impurities

Benzydamine EP Impurity C

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CAS No.

: 2215-63-6

Mol F.

: C14H12N2O

Mol W.

: 224.3

Cat No.

: SA54603

Benzydamine, Impurities

Benzydamine EP Impurity D

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CAS No.

: 1337966-15-0

Mol F.

: C23H32N4O

Mol W.

: 380.5

Cat No.

: SA54604

Benzydamine, Impurities

Benzydamine EP Impurity E

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CAS No.

: 52413-42-0

Mol F.

: C19H23N3O

Mol W.

: 309.4

Cat No.

: SA54605

Benzydamine, Impurities

Benzydamine EP Impurity F

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CAS No.

: 87453-75-6

Mol F.

: C12H18N2O2

Mol W.

: 222.3

Cat No.

: SA54606

Benzydamine, Impurities

Benzydamine EP Impurity G

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CAS No.

: 109-54-6

Mol F.

: C5H12ClN

Mol W.

: 121.6

Cat No.

: SA54607

Benzydamine, Impurities

Benzydamine N-Oxide

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CAS No.

: 36504-71-9

Mol F.

: C19H23N3O2

Mol W.

: 325.4

Cat No.

: SA54609

Impurities, Pregabalin

Benzyl 3-((3-(Aminomethyl)-5-methylhexanamido)methyl)-5-methylhexanoate

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CAS No.

: NA

Mol F.

: C23H2N2O3

Mol W.

: 390.56

Cat No.

: SA24825

Dapagliflozin, Impurities

Benzyl Dimer Dapgliflozin Impurity

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CAS No.

: 2183515-30-0

Mol F.

: C28H30Cl2O6

Mol W.

: 533.44

Cat No.

: SA15057