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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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Alimemazine, Impurities

Alimemazine Pyrrolidinyl Analog

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CAS No.

: 84-08-2

Mol F.

: C18H20N2S

Mol W.

: 296.4

Cat No.

: SA55905

Citalopram, Impurities

Alkene Dimer Citalopram impurity

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CAS No.

: 1370643-27-8

Mol F.

: C40H41ClF2N4O

Mol W.

: 667.23

Cat No.

: SA17020

Allopurinol, Impurities

Allopurinol

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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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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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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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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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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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CAS No.

: 31055-19-3

Mol F.

: C7H9N3O3

Mol W.

: 183.16

Cat No.

: SA28905

Allopurinol

Allopurinol EP Impurity F

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CAS No.

: 302-01-2 (Freebase), 7803-57-8 (Monohydrate)

Mol F.

: H4N4

Mol W.

: 32.05

Cat No.

: SA28906

Allopurinol, Impurities

Allopurinol Nitrile Impurity

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CAS No.

: 16617-46-2

Mol F.

: C4H4N4

Mol W.

: 108.10

Cat No.

: SA28917

Allopurinol, Impurities

Allopurinol riboside

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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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CAS No.

: 321571-07-7

Mol F.

: C12H14N4O4

Mol W.

: 278.26

Cat No.

: SA28916

Alogliptin, Impurities

Alogliptin 1-Methylpyrimidine Trione Impurity

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CAS No.

: 2565-47-1

Mol F.

: C5H6N2O3

Mol W.

: 142.1

Cat No.

: SA54120

Alogliptin, Impurities, Nitrosamine

Alogliptin 1-nitrosopiperidinyl amino (S) Isomer Impurity

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CAS No.

: NA

Mol F.

: C18H20N6O3

Mol W.

: 368.4

Cat No.

: SA54130

Alogliptin, Impurities

Alogliptin 2-(Bromomethyl)Benzamide Impurity

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CAS No.

: 872414-52-3

Mol F.

: C8H8BrNO

Mol W.

: 214.1

Cat No.

: SA54121

Alogliptin, Impurities

Alogliptin 2-Cyanobenzyl Benzamide Impurity

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CAS No.

: 2749281-73-8

Mol F.

: C25H25N5O3

Mol W.

: 443.5

Cat No.

: SA54127

Alogliptin, Impurities

Alogliptin 2-Cyanobenzyl Benzonitrile Impurity

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CAS No.

: 2749424-28-8

Mol F.

: C26H26N6O2

Mol W.

: 454.5

Cat No.

: SA54129

Alogliptin, Impurities

Alogliptin 6-Methoxy-3-methyl-dihydropyrimidinyl Benzonitrile Impurity

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CAS No.

: 2514763-78-9

Mol F.

: C14H13N3O3

Mol W.

: 271.3

Cat No.

: SA54125

Alogliptin, Impurities

Alogliptin Aminopiperidinyl Benzonitrile

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CAS No.

: 1353254-17-7

Mol F.

: C13H17N3

Mol W.

: 215.3

Cat No.

: SA54117

Alogliptin, Impurities

Alogliptin Aminopiperidinyl-3-methylpyrimidinedione Impurity

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CAS No.

: 2276316-91-5

Mol F.

: C10H16N4O2

Mol W.

: 224.3

Cat No.

: SA54124

Alogliptin, Impurities

Alogliptin Benzoate

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CAS No.

: 850649-62-6

Mol F.

: C18H21N5O2 : C7H6O2

Mol W.

: 339.4 : 122.1

Cat No.

: SA54100

Alogliptin, Impurities

Alogliptin Benzoate Dimer Impurity

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CAS No.

: 1268836-55-0

Mol F.

: C31H30N8O4

Mol W.

: 578.6

Cat No.

: SA54113

Alogliptin, Impurities, Nitrosamine

Alogliptin Benzoate Dimer Nitroso Impurity

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CAS No.

: NA

Mol F.

: C31H29N9O5

Mol W.

: 607.6

Cat No.

: SA54114

Alogliptin, Impurities

Alogliptin Chloro-N-ethyl Dihydropyrimidinyl Benzonitrile Impurity

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CAS No.

: 1430222-06-2

Mol F.

: C14H12ClN3O2

Mol W.

: 289.7

Cat No.

: SA54123

Alogliptin, Impurities

Alogliptin Chloro-N-methyl Dihydropyrimidinyl Benzonitrile Impurity

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CAS No.

: 865758-96-9

Mol F.

: C13H10ClN3O2

Mol W.

: 275.7

Cat No.

: SA54122

Alogliptin, Impurities

Alogliptin Dibenzonitrile Impurity

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CAS No.

: 865759-10-0

Mol F.

: C25H24N6O2

Mol W.

: 440.5

Cat No.

: SA54126

Alogliptin, Impurities

Alogliptin Dibromomethyl Benzonitrile Impurity

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CAS No.

: 655-63-0

Mol F.

: C8H5Br2N

Mol W.

: 274.9

Cat No.

: SA54118

Alogliptin, Impurities

Alogliptin Dihydropyrimidinyl Benzonitrile Impurity

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CAS No.

: 865758-95-8

Mol F.

: C12H8ClN3O2

Mol W.

: 261.7

Cat No.

: SA54115

Alogliptin, Impurities

Alogliptin Hydroxy Impurity

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CAS No.

: NA

Mol F.

: C18H20N4O3

Mol W.

: 340.4

Cat No.

: SA54111

Alogliptin, Impurities

Alogliptin Impurity A

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CAS No.

: 1638544-62-3

Mol F.

: C18H21N5O2

Mol W.

: 339.4

Cat No.

: SA54102

Alogliptin, Impurities

Alogliptin Impurity B

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CAS No.

: 1339955-49-5

Mol F.

: C18H21N5O2

Mol W.

: 339.4

Cat No.

: SA54103

Alogliptin, Impurities

Alogliptin Impurity C

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CAS No.

: 4316-23-8

Mol F.

: C9H8O4

Mol W.

: 180.2

Cat No.

: SA54104

Alogliptin, Impurities

Alogliptin Impurity D

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CAS No.

: 1573118-32-7

Mol F.

: C14H16N2O2

Mol W.

: 244.3

Cat No.

: SA54105

Alogliptin, Impurities

Alogliptin Impurity E

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CAS No.

: 1638544-56-5

Mol F.

: C27H25N5O4

Mol W.

: 483.5

Cat No.

: SA54106

Alogliptin, Impurities

Alogliptin Impurity F

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CAS No.

: 1638544-55-4

Mol F.

: C26H23N5O4

Mol W.

: 469.5

Cat No.

: SA54107

Alogliptin, Impurities

Alogliptin Impurity G

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CAS No.

: NA

Mol F.

: C31H32N8O4

Mol W.

: 580.6

Cat No.

: SA54108

Alogliptin, Impurities

Alogliptin N-Methyl Dihydropyrimidinyl Benzonitrile

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CAS No.

: 2749428-42-8

Mol F.

: C13H10ClN3O2

Mol W.

: 275.7

Cat No.

: SA54116

Alogliptin, Impurities, Nitrosamine

Alogliptin N-Nitrosoglycine Impurity

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CAS No.

: NA

Mol F.

: C20H22N6O5

Mol W.

: 426.4

Cat No.

: SA54131

Alogliptin, Impurities

Alogliptin Piperidinylamin Dihydropyrimidinyl Benzonitrile Impurity

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CAS No.

: 2089611-85-6

Mol F.

: C18H21N5O2

Mol W.

: 339.4

Cat No.

: SA54128

Alogliptin, Impurities

Alogliptin Trioxotetrahydropyrimidinyl Benzonitrile

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CAS No.

: 1246610-72-9

Mol F.

: C13H11N3O3

Mol W.

: 257.3

Cat No.

: SA54119

Fingolimod, Impurities

alpha-Amino Acid Fingolimod Impurity

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CAS No.

: 596820-19-8

Mol F.

: C18H29NO2

Mol W.

: 291.43

Cat No.

: SA34505

Impurities, Permethrin

Alpha-Cypermethrin

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CAS No.

: 67375-30-8

Mol F.

: C22H19Cl2NO3

Mol W.

: 416.3

Cat No.

: SA51912

Dapagliflozin

Alpha-Ethoxy Dapagliflozin Analog

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CAS No.

: 2173339-31-4

Mol F.

: C23H29ClO7

Mol W.

: 452.9

Cat No.

: SA15088

Dapagliflozin

Alpha-Methoxy Dapagliflozin Ketone Impurity

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CAS No.

: 2377899-45-9

Mol F.

: C22H25ClO8

Mol W.

: 452.9

Cat No.

: SA15082

Alprazolam, Impurities

Alprazolam EP Impurity A

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CAS No.

: 27537-87-7

Mol F.

: C15H14ClN3O

Mol W.

: 287.7

Cat No.

: SA57500

Alprazolam, Impurities

Alprazolam EP Impurity B

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CAS No.

: 38150-27-5

Mol F.

: C17H14ClN3O2

Mol W.

: 327.8

Cat No.

: SA57501

Alprazolam, Impurities

Alprazolam EP Impurity C

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CAS No.

: 36916-19-5

Mol F.

: C16H12ClN3O

Mol W.

: 297.7

Cat No.

: SA57502

Alprazolam, Impurities

Alprazolam EP Impurity D

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CAS No.

: NA

Mol F.

: C18H13ClN4

Mol W.

: 320.8

Cat No.

: SA57503

Alprazolam, Impurities

Alprazolam EP Impurity E

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CAS No.

: 719-59-5

Mol F.

: C13H10ClNO

Mol W.

: 231.7

Cat No.

: SA57504

Alprazolam, Impurities

Alprazolam EP Impurity F

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CAS No.

: 37945-07-6

Mol F.

: C17H13Cl2N3O

Mol W.

: 346.2

Cat No.

: SA57505