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Impurities

SynThink is a producer and supplier of a number of pharmaceutical Reference Standards (Impurity Standards) which are required for pharmaceutical companies to study quality, stability and biological safety of pharmaceutical products. Many API Impurities are available in our stock.

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Albendazole, Impurities

Albendazole Impurity H

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Out of Stock

CAS No.

: 20367-38-8

Mol F.

: C9H8ClN3O2

Mol W.

: 225.63

Cat No.

: SA31108

Albendazole, Impurities

Albendazole Mercapto Analog

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Out of Stock

CAS No.

: 79213-76-6

Mol F.

: C9H9N3O2S

Mol W.

: 223.25

Cat No.

: SA31110

Impurities, Salbutamol

Albuterol Related Compound F | CAS : 1221742-55-7

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Out of Stock

CAS No.

: 1221742-55-7

Mol F.

: C15H25NO3

Mol W.

: 267.4

Cat No.

: SA26022

Alcaftadine, Impurities

Alcaftadine

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Out of Stock

CAS No.

: 147084-10-4

Mol F.

: C19H21N3O

Mol W.

: 307.39

Cat No.

: SA31000

Alcaftadine, Impurities

Alcaftadine 3-Carboxylic Acid Impurity

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Out of Stock

CAS No.

: 147083-93-0

Mol F.

: C19H21N3O2

Mol W.

: 323.39

Cat No.

: SA31001

Alcaftadine, Impurities

Alcaftadine 3-hydroxy methyl Impurity

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Out of Stock

CAS No.

: 147083-89-4

Mol F.

: C19H23N3O

Mol W.

: 309.41

Cat No.

: SA31003

Alcaftadine, Impurities

Alcaftadine di hydroxymethyl Impurity

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Out of Stock

CAS No.

: 147083-92-9

Mol F.

: C20H25N3O2

Mol W.

: 339.44

Cat No.

: SA31007

Alcaftadine, Impurities

Alcaftadine dicarboxaldehyde Impurity

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Out of Stock

CAS No.

: NA

Mol F.

: C20H21N3O2

Mol W.

: 335.41

Cat No.

: SA31005

Alcaftadine, Impurities

Alcaftadine Open Ring Impurity

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Out of Stock

CAS No.

: NA

Mol F.

: C18H23N3O

Mol W.

: 297.4

Cat No.

: SA31004

Alcaftadine, Impurities

Alcaftadine-N-Oxide

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Out of Stock

CAS No.

: 952649-75-1

Mol F.

: C19H21N3O2

Mol W.

: 323.39

Cat No.

: SA31002

Donepezil, Impurities

Aldehyde Impurity Donepezil Impurity

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Out of Stock

CAS No.

: 22065-85-6

Mol F.

: C13H17NO

Mol W.

: 203.28

Cat No.

: SA34320

Citalopram, Impurities

Alkene Dimer Citalopram impurity

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Out of Stock

CAS No.

: 1370643-27-8

Mol F.

: C40H41ClF2N4O

Mol W.

: 667.23

Cat No.

: SA17020

Allopurinol, Impurities

Allopurinol

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Out of Stock

CAS No.

: 315-30-0

Mol F.

: C5H4N4O

Mol W.

: 136.11

Cat No.

: SA28900

Allopurinol, Impurities

Allopurinol EP Impurity A

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Out of Stock

CAS No.

: 27511-79-1

Mol F.

: C4H6N4O

Mol W.

: 126.12

Cat No.

: SA28901

Allopurinol, Impurities

Allopurinol EP Impurity B

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Out of Stock

CAS No.

: 22407-20-1

Mol F.

: C5H6N4O2

Mol W.

: 154.13

Cat No.

: SA28902

Allopurinol, Impurities

Allopurinol EP Impurity C

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Out of Stock

CAS No.

: 1346604-13-4

Mol F.

: C6H6N6O

Mol W.

: 178.15

Cat No.

: SA28903

Allopurinol, Impurities

Allopurinol EP Impurity D

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Out of Stock

CAS No.

: 6994-25-8

Mol F.

: C6H9N3O2

Mol W.

: 155.15

Cat No.

: SA28904

Allopurinol, Impurities

Allopurinol EP Impurity E

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Out of Stock

CAS No.

: 31055-19-3

Mol F.

: C7H9N3O3

Mol W.

: 183.16

Cat No.

: SA28905

Allopurinol, Impurities

Allopurinol EP Impurity F

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Out of Stock

CAS No.

: 302-01-2

Mol F.

: H4N4

Mol W.

: 32.05

Cat No.

: SA28906

Allopurinol, Impurities

Allopurinol Nitrile Impurity

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Out of Stock

CAS No.

: 16617-46-2

Mol F.

: C4H4N4

Mol W.

: 108.10

Cat No.

: SA28917

Allopurinol, Impurities

Allopurinol riboside

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Out of Stock

CAS No.

: 16220-07-8

Mol F.

: C10H12N4O5

Mol W.

: 268.23

Cat No.

: SA28911

Allopurinol, Impurities

Allopurinol USP Related Compound F

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Out of Stock

CAS No.

: 321571-07-7

Mol F.

: C12H14N4O4

Mol W.

: 278.26

Cat No.

: SA28916

Fingolimod, Impurities

alpha-Amino Acid Fingolimod Impurity

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Out of Stock

CAS No.

: 596820-19-8

Mol F.

: C18H29NO2

Mol W.

: 291.43

Cat No.

: SA34505

Amiodarone, Impurities

Amiodarone

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Out of Stock

CAS No.

: 19774-82-4

Mol F.

: C25H30ClI2NO3

Mol W.

: 681.77

Cat No.

: SA26400

Amiodarone, Impurities

Amiodarone Didesethyl Impurity

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Out of Stock

CAS No.

: 94317-95-0 (Base); 757220-04-5(HCl salt)

Mol F.

: C21H21I2NO3

Mol W.

: 589.21

Cat No.

: SA26409

Amiodarone, Impurities

Amiodarone EP Impurity A

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Out of Stock

CAS No.

: 23551-25-9 (Base); 95820-13-6 (HCl Salt)

Mol F.

: C25H31NO3

Mol W.

: 393.52

Cat No.

: SA26401

Amiodarone, Impurities

Amiodarone EP Impurity B

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Out of Stock

CAS No.

: 83409-32-9(Base);96027-74-6(HClSalt)

Mol F.

: C23H25I2NO3

Mol W.

: 617.26

Cat No.

: SA26402

Amiodarone, Impurities

Amiodarone EP Impurity C

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Out of Stock

CAS No.

: 85642-08-6

Mol F.

: C25H30INO3

Mol W.

: 519.41

Cat No.

: SA26403

Amiodarone, Impurities

Amiodarone EP Impurity D

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Out of Stock

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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Out of Stock

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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Out of Stock

CAS No.

: 147030-50-0

Mol F.

: C19H17IO3

Mol W.

: 420.24

Cat No.

: SA26406

Amiodarone, Impurities

Amiodarone EP Impurity G

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Out of Stock

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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Out of Stock

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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Out of Stock

CAS No.

: 83790-87-8

Mol F.

: C20H20O3

Mol W.

: 308.37

Cat No.

: SA26410

Amiodarone, Impurities

Amiodarone N-Oxide

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Out of Stock

CAS No.

: 318267-30-0

Mol F.

: C25H29I2NO4

Mol W.

: 661.31

Cat No.

: SA26411

Amitriptyline, Impurities

Amitriptyline

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Out of Stock

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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Out of Stock

CAS No.

: 6202-23-9

Mol F.

: C20H21N

Mol W.

: 275.39

Cat No.

: SA37702

Amitriptyline, Impurities

Amitriptyline N-Oxide

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Out of Stock

CAS No.

: 4317-14-0

Mol F.

: C20H23NO

Mol W.

: 293.4

Cat No.

: SA37708

Amlodipine, Impurities

Amlodipine (R)-Isomer

$255.00 25 mg

Out of Stock

CAS No.

: 103129-81-3

Mol F.

: C20H25ClN2O5

Mol W.

: 408.88

Cat No.

: SA30500

Amlodipine, Impurities

Amlodipine (S)-Isomer

$75.00 25 mg

Out of Stock

CAS No.

: 103129-82-4

Mol F.

: C20H25ClN2O5

Mol W.

: 408.88

Cat No.

: SA30501

Amlodipine, Impurities

Amlodipine Azido Impurity

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Out of Stock

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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Out of Stock

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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Out of Stock

CAS No.

: 400602-36-0

Mol F.

: C24H27ClN2O8

Mol W.

: 506.9

Cat No.

: SA30521

Amoxicillin, Impurities

Amoxicillin Dimer impurity

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Out of Stock

CAS No.

Mol F.

Mol W.

Cat No.

: SA15308

Amoxicillin, Impurities

Amoxicillin EP Impurity B

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Out of Stock

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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Out of Stock

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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Out of Stock

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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Out of Stock

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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Out of Stock

CAS No.

: 188112-75-6

Mol F.

: C24H26N4O7S

Mol W.

: 514.6

Cat No.

: SA15317

Amoxicillin, Impurities

Amoxicillin EP Impurity K

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C32H40N6O11S2

Mol W.

: 748.82

Cat No.

: SA15318