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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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Amisulpride, Impurities

Amisulpride EP Impurity H

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CAS No.

: 1391054-22-0

Mol F.

: C18H29N3O4S

Mol W.

: 383.5

Cat No.

: SA55510

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, Impurities

Amlodipine 2-Aminoethyl Ester Impurity

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CAS No.

: 2923811-73-6

Mol F.

: C20H26ClN3O5

Mol W.

: 423.89

Cat No.

: SA30523

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

Amlodipine Glucose and Galactose Adduct (1:1)

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CAS No.

: NA

Mol F.

: C26H35ClN2O10

Mol W.

: 571.0

Cat No.

: SA30525

Amlodipine, Impurities

Amlodipine Isophthaloyl Dimer Impurity

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CAS No.

: 2309467-38-5

Mol F.

: C48H52Cl2N4O12

Mol W.

: 947.9

Cat No.

: SA30526

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

Amorolfine, Impurities

Amorolfine

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CAS No.

: 78613-35-1

Mol F.

: C21H35NO

Mol W.

: 317.5

Cat No.

: SA57300

Amoxicillin, Impurities

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

Ampicillin, Impurities

Ampicillin

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CAS No.

: 69-53-4

Mol F.

: C16H19N3O4S

Mol W.

: 349.4

Cat No.

: SA56100

Ampicillin, Impurities

Ampicillin EP Impurity A

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CAS No.

: 551-16-6

Mol F.

: C8H12N2O3S

Mol W.

: 216.3

Cat No.

: SA56101

Ampicillin, Impurities

Ampicillin EP Impurity B

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CAS No.

: 19379-33-0

Mol F.

: C16H19N3O4S

Mol W.

: 349.4

Cat No.

: SA56102

Ampicillin, Impurities

Ampicillin EP Impurity C

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CAS No.

: NA

Mol F.

: C16H19N3O4S

Mol W.

: 349.4

Cat No.

: SA56103

Ampicillin, Impurities

Ampicillin EP Impurity D

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CAS No.

: 1642629-93-3

Mol F.

: C16H21N3O5S

Mol W.

: 367.4

Cat No.

: SA56104

Ampicillin, Impurities

Ampicillin EP Impurity E

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CAS No.

: 1207726-28-0

Mol F.

: C24H26N4O5S

Mol W.

: 482.6

Cat No.

: SA56105

Ampicillin, Impurities

Ampicillin EP Impurity F

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CAS No.

: 2197189-82-3

Mol F.

: C15H21N3O3S

Mol W.

: 323.4

Cat No.

: SA56106

Ampicillin, Impurities

Ampicillin EP Impurity G

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CAS No.

: 31485-02-6

Mol F.

: C16H14N2O2

Mol W.

: 266.3

Cat No.

: SA56107

Ampicillin, Impurities

Ampicillin EP Impurity H

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CAS No.

: 73200-73-4

Mol F.

: C10H8N2O

Mol W.

: 172.2

Cat No.

: SA56108

Ampicillin, Impurities

Ampicillin EP Impurity I

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CAS No.

: NA

Mol F.

: C24H26N4O5S

Mol W.

: 482.6

Cat No.

: SA56109

Ampicillin, Impurities

Ampicillin EP Impurity J

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CAS No.

: 6489-58-3

Mol F.

: C13H20N2O4S

Mol W.

: 300.4

Cat No.

: SA56110

Ampicillin, Impurities

Ampicillin EP Impurity K

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CAS No.

: 40610-41-1

Mol F.

: C13H17NO3

Mol W.

: 235.3

Cat No.

: SA56111

Ampicillin, Impurities

Ampicillin EP Impurity L

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CAS No.

: 875-74-1

Mol F.

: C8H9NO2

Mol W.

: 151.2

Cat No.

: SA56112

Ampicillin, Impurities

Ampicillin EP Impurity M Disodium Salt

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CAS No.

: NA

Mol F.

: C32H38N6O8S2 : 2(Na)

Mol W.

: 698.8 : 2(23.0)

Cat No.

: SA56114

Ampicillin, Impurities

Ampicillin EP Impurity N

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CAS No.

: NA

Mol F.

: C32H40N6O9S2 : 3Na

Mol W.

: 716.8 : 3(23.0)

Cat No.

: SA56113

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

Anastrozole Amide Acid

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CAS No.

: 2469244-33-3

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