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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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Amiodarone, Impurities

Amiodarone EP Impurity D

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CAS No.

: 1951-26-4

Mol F.

: C19H16I2O3

Mol W.

: 546.14

Cat No.

: SA26404

Amiodarone, Impurities

Amiodarone EP Impurity E

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CAS No.

: 52490-15-0

Mol F.

: C19H18O3

Mol W.

: 294.34

Cat No.

: SA26405

Amiodarone, Impurities

Amiodarone EP Impurity F

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CAS No.

: 147030-50-0

Mol F.

: C19H17IO3

Mol W.

: 420.24

Cat No.

: SA26406

Amiodarone

Amiodarone EP Impurity G

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CAS No.

: 1087223-70-8

Mol F.

: C26H31I2NO4

Mol W.

: 675.34

Cat No.

: SA26407

Amiodarone, Impurities

Amiodarone EP Impurity H

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CAS No.

: 100-35-6 (base); 869-24-9(HCl salt)

Mol F.

: C6H14ClN

Mol W.

: 135.64

Cat No.

: SA26408

Amiodarone, Impurities

Amiodarone Methoxy Impurity

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CAS No.

: 83790-87-8

Mol F.

: C20H20O3

Mol W.

: 308.37

Cat No.

: SA26410

Amiodarone, Impurities

Amiodarone N-Oxide

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CAS No.

: 318267-30-0

Mol F.

: C25H29I2NO4

Mol W.

: 661.31

Cat No.

: SA26411

Amitriptyline, Impurities

Amitriptyline

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CAS No.

: 549-18-8

Mol F.

: C20H23N

Mol W.

: 277.4

Cat No.

: SA37700

Amitriptyline, Impurities

Amitriptyline EP Impurity B

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CAS No.

: 6202-23-9

Mol F.

: C20H21N

Mol W.

: 275.39

Cat No.

: SA37702

Amitriptyline, Impurities

Amitriptyline N-Oxide

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CAS No.

: 4317-14-0

Mol F.

: C20H23NO

Mol W.

: 293.4

Cat No.

: SA37708

Amlodipine

Amlodipine (R)-Isomer

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CAS No.

: 103129-81-3

Mol F.

: C20H25ClN2O5

Mol W.

: 408.88

Cat No.

: SA30500

Amlodipine

Amlodipine (S)-Isomer

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CAS No.

: 103129-82-4

Mol F.

: C20H25ClN2O5

Mol W.

: 408.88

Cat No.

: SA30501

Amlodipine, Impurities

Amlodipine Azido Impurity

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CAS No.

: 88150-46-3

Mol F.

: C20H23ClN4O5

Mol W.

: 434.87

Cat No.

: SA30511

Amlodipine, Impurities

Amlodipine EP Impurity K

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CAS No.

: 1621516-91-3

Mol F.

: C18H20ClNO3

Mol W.

: 333.81

Cat No.

: SA30510

Amlodipine, Impurities

Amlodipine Maleic Acid Amide Impurity | CAS : 400602-36-0

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CAS No.

: 400602-36-0

Mol F.

: C24H27ClN2O8

Mol W.

: 506.9

Cat No.

: SA30521

Amlodipine, Impurities

Amlodipine N-Acetyl Impurity

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CAS No.

: 93848-82-9

Mol F.

: C22H27ClN2O6

Mol W.

: 450.91

Cat No.

: SA30522

Amoxicillin

Amoxicilin Alpha Penicilloic Acid | CAS : 87860-49-9

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CAS No.

: 87860-49-9

Mol F.

: C16H21N3O6S

Mol W.

: 383.42

Cat No.

: SA15305

Amoxicillin, Impurities

Amoxicillin Beta Penicilloic Acid | CAS : 42947-63-7

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CAS No.

: 42947-63-7

Mol F.

: C16H21N3O6S

Mol W.

: 383.42

Cat No.

: SA15306

Amoxicillin, Impurities

Amoxicillin EP Impurity B

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CAS No.

: 26889-93-0

Mol F.

: C16H19N3O5S

Mol W.

: 365.4

Cat No.

: SA15312

Amoxicillin, Impurities

Amoxicillin EP Impurity C

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CAS No.

: 2088961-37-7

Mol F.

: C16H19N3O5S

Mol W.

: 365.4

Cat No.

: SA15313

Amoxicillin, Impurities

Amoxicillin EP Impurity D

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CAS No.

: 1642629-94-4 (diacid)

Mol F.

: C16H21N3O6S

Mol W.

: 383.42

Cat No.

: SA15314

Amoxicillin, Impurities

Amoxicillin EP Impurity E

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CAS No.

: 1356020-01-3

Mol F.

: C15H21N3O4S

Mol W.

: 339.41

Cat No.

: SA15315

Amoxicillin, Impurities

Amoxicillin EP Impurity G

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CAS No.

: 188112-75-6

Mol F.

: C24H26N4O7S

Mol W.

: 514.6

Cat No.

: SA15317

Amoxicillin, Impurities

Amoxicillin EP Impurity I | CAS : 22818-40-2

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CAS No.

: 22818-40-2

Mol F.

: 167.16

Mol W.

: C8H9NO3

Cat No.

: SA15310

Amoxicillin, Impurities

Amoxicillin EP Impurity J

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CAS No.

: 2088960-43-2

Mol F.

: C32H38N6O10S2

Mol W.

: 730.8

Cat No.

: SA15301

Amoxicillin, Impurities

Amoxicillin EP Impurity K

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CAS No.

: 2088961-38-8 (free base)

Mol F.

: C32H40N6O11S2

Mol W.

: 748.82

Cat No.

: SA15318

Amoxicillin, Impurities

Amoxicillin EP Impurity L

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CAS No.

: 1789703-32-7

Mol F.

: C24H29N5O7S2

Mol W.

: 563.65

Cat No.

: SA15319

Amoxicillin, Impurities

Amoxicillin Open Ring Methyl Ester | CAS : 185802-22-6

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CAS No.

: 185802-22-6

Mol F.

: C17H23N3O6S

Mol W.

: 397.45

Cat No.

: SA15308

Amoxicillin, Impurities

Amoxicillin Ring-Opened Trimeric Impurity

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CAS No.

: NA

Mol F.

: C48H59N9O16S3Na4

Mol W.

: 1206.2

Cat No.

: SA15323

Amoxicillin, Impurities

Amoxicillin Sulfoxide Impurity | CAS : 2485704-40-1

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CAS No.

: 2485704-40-1

Mol F.

: C16H19N3O6S

Mol W.

: 381.4

Cat No.

: SA15302

Amoxicillin

Amoxicillin Trimer Impurity | CAS : 2088961-40-2

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CAS No.

: 2088961-40-2

Mol F.

: C48H57N9O15S3

Mol W.

: 1096.21

Cat No.

: SA15309

Amoxicillin, Impurities

Amoxicillin USP Related Compound M

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CAS No.

: NA

Mol F.

: C24H31N5O8S2

Mol W.

: 581.66

Cat No.

: SA15304

Anastrozole, Impurities

Anastrozole

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CAS No.

: 120511-73-1

Mol F.

: C17H19N5

Mol W.

: 293.37

Cat No.

: SA40700

Anastrozole, Impurities

Anastrozole 1,3-Dibromomethyl Impurity

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CAS No.

: 19294-04-3

Mol F.

: C9H10Br2

Mol W.

: 277.98

Cat No.

: SA40712

Anastrozole, Impurities

Anastrozole 1,3-Dicyanomethyl Impurity

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CAS No.

: 120511-74-2

Mol F.

: C11H10N2

Mol W.

: 170.21

Cat No.

: SA40713

Anastrozole, Impurities

Anastrozole Amide Acid

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CAS No.

: NA

Mol F.

: C17H22N4O3

Mol W.

: 330.38

Cat No.

: SA40714

Anastrozole, Impurities

Anastrozole Diacid

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CAS No.

: 1338800-81-9

Mol F.

: C17H21N3O4

Mol W.

: 343.44

Cat No.

: SA40715

Anastrozole, Impurities

Anastrozole Diamide Impurity

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CAS No.

: 120512-04-1

Mol F.

: C17H23N5O2

Mol W.

: 329.4

Cat No.

: SA40702

Anastrozole, Impurities

Anastrozole EP Impurity A

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CAS No.

: 1215780-15-6

Mol F.

: C16H17N5

Mol W.

: 279.34

Cat No.

: SA40703

Anastrozole, Impurities

Anastrozole EP Impurity B

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CAS No.

: 1216898-82-6

Mol F.

: C30H31N9

Mol W.

: 517.63

Cat No.

: SA40704

Anastrozole, Impurities

Anastrozole EP Impurity C

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CAS No.

: 120511-84-4

Mol F.

: C15H17BrN2

Mol W.

: 305.21

Cat No.

: SA40705

Anastrozole, Impurities

Anastrozole EP Impurity D

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CAS No.

: 1027160-12-8

Mol F.

: C15H16Br2N2

Mol W.

: 384.11

Cat No.

: SA40706

Anastrozole, Impurities

Anastrozole EP Impurity E

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CAS No.

: 120511-88-8

Mol F.

: C15H18N2O

Mol W.

: 242.32

Cat No.

: SA40707

Anastrozole, Impurities

Anastrozole EP Impurity F

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CAS No.

: 6192-52-5

Mol F.

: C7H10O4S

Mol W.

: 190.22

Cat No.

: SA40708

Anastrozole, Impurities

Anastrozole EP Impurity G

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CAS No.

: 120511-92-4

Mol F.

: C17H19N5

Mol W.

: 293.37

Cat No.

: SA40709

Anastrozole, Impurities

Anastrozole EP Impurity H

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CAS No.

: 120511-72-0

Mol F.

: C15H18N2

Mol W.

: 226.32

Cat No.

: SA40716

Anastrozole, Impurities

Anastrozole EP Impurity I

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CAS No.

: 120511-91-3

Mol F.

: C15H17ClN2

Mol W.

: 260.76

Cat No.

: SA40710

Anastrozole, Impurities

Anastrozole Formyl Impurity

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CAS No.

: 120511-89-9

Mol F.

: C15H16N2O

Mol W.

: 240.3

Cat No.

: SA40711

Anastrozole, Impurities

Anastrozole Monoamide Nitrile

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CAS No.

: 120512-03-0

Mol F.

: C17H21N5O

Mol W.

: 311.38

Cat No.

: SA40701

Exemestane, Impurities

Androstane-3,6,17-triol

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CAS No.

: 49644-04-4

Mol F.

: C19H32O3

Mol W.

: 308.46

Cat No.

: SA19134