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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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Apremilast, Impurities

Apremilast N-Desacetyl O4-Desmethyl O3-Desethyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 1384439-80-8

Mol F.

: C17H16N2O6S

Mol W.

: 376.38

Cat No.

: SA30011

Aprepitant, Impurities

Aprepitant (R,S,S)-Isomer

$1,250.00 25 mg

Out of Stock

CAS No.

: 172822-28-5

Mol F.

: C23H21F7N4O3

Mol W.

: 534.4

Cat No.

: SA43709

Aprepitant, Impurities

Aprepitant EP Impurity B

$555.00 25 mg

Out of Stock

CAS No.

: 2348441-62-1

Mol F.

: C29H25F7N4O3

Mol W.

: 610.5

Cat No.

: SA43710

Aprepitant, Impurities

Aprepitant EP Impurity C

$555.00 25 mg

Out of Stock

CAS No.

: 2348441-63-2

Mol F.

: C29H25F7N4O3

Mol W.

: 610.5

Cat No.

: SA43711

Fosaprepitant, Impurities

Aprepitant M2 Metabolite (1S, 2S, 3R)-Isomer

$450.00 25 mg

Out of Stock

CAS No.

: 327623-37-0 (free base); 2475188-05-5

Mol F.

: C20H18F7NO2

Mol W.

: 437.35

Cat No.

: SA45422

Argatroban, Impurities

Argatroban

Please enquire for price & pack size

Out of Stock

CAS No.

: 74863-84-6

Mol F.

: C23H36N6O5S

Mol W.

: 508.6

Cat No.

: SA48400

Argatroban, Impurities

Argatroban (21R)-Isomer

Please enquire for price & pack size

Out of Stock

CAS No.

: 121785-71-5

Mol F.

: C23H36N6O5S

Mol W.

: 508.63

Cat No.

: SA48404

Argatroban, Impurities

Argatroban (21S)-Isomer

Please enquire for price & pack size

Out of Stock

CAS No.

: 121785-72-6

Mol F.

: C23H36N6O5S

Mol W.

: 508.63

Cat No.

: SA48403

Argatroban, Impurities

Argatroban (2S,4R)-Isomer

Please enquire for price & pack size

Out of Stock

CAS No.

: 189264-02-6

Mol F.

: C23H36N6O5S

Mol W.

: 508.63

Cat No.

: SA48402

Argatroban, Impurities

Argatroban (2S,4S)-Isomer

Please enquire for price & pack size

Out of Stock

CAS No.

: 189264-03-7

Mol F.

: C23H36N6O5S

Mol W.

: 508.63

Cat No.

: SA48401

Argatroban, Impurities

Argatroban 5-Amino Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 188659-43-0

Mol F.

: C22H34N4O5S

Mol W.

: 466.59

Cat No.

: SA48409

Argatroban, Impurities

Argatroban USP Related Compound A

Please enquire for price & pack size

Out of Stock

CAS No.

: 74874-10-5

Mol F.

: C23H31N7O7S

Mol W.

: 549.6

Cat No.

: SA48405

Aripiprazole, Impurities

Aripiprazole 3,4-Dichloro Analog

Please enquire for price & pack size

Out of Stock

CAS No.

: 203395-75-9

Mol F.

: C23H27Cl2N3O2

Mol W.

: 448.39

Cat No.

: SA24011

Aripiprazole, Impurities

Aripiprazole Bromobutoxyquinoline Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 129722-34-5

Mol F.

: C13H16BrNO2

Mol W.

: 298.18

Cat No.

: SA24010

Aripiprazole, Impurities

Aripiprazole Butanoic Acid Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 58899-27-7

Mol F.

: C13H15NO4

Mol W.

: 249.26

Cat No.

: SA24014

Aripiprazole, Impurities

Aripiprazole Methoxybutoxyquinoline Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 1770391-64-4

Mol F.

: C14H19NO3

Mol W.

: 249.31

Cat No.

: SA24018

Aripiprazole, Impurities

Aripiprazole N,N-Dioxide

Please enquire for price & pack size

Out of Stock

CAS No.

: 573691-13-1

Mol F.

: C23H27Cl2N3O4

Mol W.

: 480.38

Cat No.

: SA24020

Aripiprazole, Impurities

Aripiprazole Quinolinediol Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 1391054-74-2

Mol F.

: C23H29Cl2N3O2

Mol W.

: 450.4

Cat No.

: SA24022

Aripiprazole, Impurities

Aripiprazole USP Related Compound B

Please enquire for price & pack size

Out of Stock

CAS No.

: 889443-20-3

Mol F.

: C13H17NO3

Mol W.

: 235.28

Cat No.

: SA24024

Aripiprazole, Impurities

Aripiprazole USP Related Compound H

Please enquire for price & pack size

Out of Stock

CAS No.

: 1796928-63-6

Mol F.

: C27H35Cl2N3O3

Mol W.

: 520.49

Cat No.

: SA24013

Ascorbic Acid, Impurities

Ascorbic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 50-81-7

Mol F.

: C6H8O6

Mol W.

: 176.12

Cat No.

: SA21502

Ascorbic Acid, Impurities

Ascorbic Acid EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 98-01-1

Mol F.

: C5H4O2

Mol W.

: 96.08

Cat No.

: SA21503

Ascorbic Acid, Impurities

Ascorbic Acid EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 21675-47-8

Mol F.

: C6H10O7

Mol W.

: 194.14

Cat No.

: SA21504

Ascorbic Acid, Impurities

Ascorbic Acid EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 67776-07-2

Mol F.

: C7H12O7

Mol W.

: 208.17

Cat No.

: SA21505

Ascorbic Acid, Impurities

Ascorbic Acid EP Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 144-62-7

Mol F.

: C2H2O4

Mol W.

: 90.03

Cat No.

: SA21506

Ascorbic Acid, Impurities

Ascorbic Acid EP Impurity F

Please enquire for price & pack size

Out of Stock

CAS No.

: 89-65-6

Mol F.

: C6H8O6

Mol W.

: 176.12

Cat No.

: SA21500

Ascorbic Acid, Impurities

Ascorbic Acid EP Impurity G

Please enquire for price & pack size

Out of Stock

CAS No.

: 66757-69-5

Mol F.

: C6H6O7

Mol W.

: 190.11

Cat No.

: SA21507

Ascorbic Acid, Impurities

Ascorbic Acid EP Impurity H

Please enquire for price & pack size

Out of Stock

CAS No.

: 122046-79-1

Mol F.

: C7H8O7

Mol W.

: 204.13

Cat No.

: SA21501

Aspirin, Impurities

Aspirin; Acetylsalicylic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 50-78-2

Mol F.

: C9H8O4

Mol W.

: 180.16

Cat No.

: SA28505

Atenolol, Impurities

Atenolol

Please enquire for price & pack size

Out of Stock

CAS No.

: 29122-68-7

Mol F.

: C14H22N2O3

Mol W.

: 266.34

Cat No.

: SA33600

Atenolol, Impurities

Atenolol EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 17194-82-0

Mol F.

: C8H9NO2

Mol W.

: 151.16

Cat No.

: SA33601

Atenolol, Impurities

Atenolol Ep Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 61698-76-8

Mol F.

: C11H15NO4

Mol W.

: 225.24

Cat No.

: SA33602

Atenolol, Impurities

Atenolol EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 29122-69-8

Mol F.

: C11H13NO3

Mol W.

: 207.23

Cat No.

: SA33603

Atenolol, Impurities

Atenolol EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 115538-83-5

Mol F.

: C11H14ClNO3

Mol W.

: 243.69

Cat No.

: SA33604

Atenolol, Impurities

Atenolol EP Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 141650-31-9

Mol F.

: C19H22N2O5

Mol W.

: 358.39

Cat No.

: SA33605

Atenolol, Impurities

Atenolol EP Impurity F

Please enquire for price & pack size

Out of Stock

CAS No.

: 87619-83-8

Mol F.

: C25H35N3O6

Mol W.

: 473.56

Cat No.

: SA33606

Atenolol, Impurities

Atenolol EP Impurity G

Please enquire for price & pack size

Out of Stock

CAS No.

: 56392-14-4

Mol F.

: C14H21NO4

Mol W.

: 267.32

Cat No.

: SA33607

Atenolol, Impurities

Atenolol EP Impurity H

Please enquire for price & pack size

Out of Stock

CAS No.

: 29277-73-4

Mol F.

: C14H20N2O2

Mol W.

: 248.32

Cat No.

: SA33608

Atenolol, Impurities

Atenolol EP Impurity I

Please enquire for price & pack size

Out of Stock

CAS No.

: 1797116-92-7

Mol F.

: C13H20N2O3

Mol W.

: 252.31

Cat No.

: SA33609

Atomoxetine, Impurities

Atomoxetine 3-Fluoro Impurity Racemate

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C17H21ClFNO

Mol W.

: 309.81

Cat No.

: SA22109

Atomoxetine, Impurities

Atomoxetine 4-Hydroxy Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 435293-66-6

Mol F.

: C17H21NO2

Mol W.

: 271.35

Cat No.

: SA22110

Atomoxetine, Impurities

Atomoxetine Chloro Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 114446-47-8

Mol F.

: C16H17ClO

Mol W.

: 260.76

Cat No.

: SA22111

Atomoxetine, Impurities

Atomoxetine EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 873310-33-9(HCl);56161-70-7(base)

Mol F.

: C16H20ClNO

Mol W.

: 277.79

Cat No.

: SA22101

Atomoxetine, Impurities

Atomoxetine EP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 82857-39-4

Mol F.

: C17H22ClNO

Mol W.

: 291.82

Cat No.

: SA22102

Atomoxetine, Impurities

Atomoxetine EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 873310-31-7

Mol F.

: C17H22ClNO

Mol W.

: 291.82

Cat No.

: SA22103

Atomoxetine, Impurities

Atomoxetine EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 873310-28-2

Mol F.

: C17H22ClNO

Mol W.

: 291.82

Cat No.

: SA22104

Atomoxetine, Impurities

Atomoxetine EP Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 17199-29-0

Mol F.

: C8H8O3

Mol W.

: 152.15

Cat No.

: SA22105

Atomoxetine, Impurities

Atomoxetine EP Impurity F

Please enquire for price & pack size

Out of Stock

CAS No.

: 1010818-92-4

Mol F.

: C17H21ClFNO

Mol W.

: 309.81

Cat No.

: SA22106

Atomoxetine, Impurities

Atomoxetine EP Impurity G

Please enquire for price & pack size

Out of Stock

CAS No.

: 2706536-33-4

Mol F.

: C27H34N2O2

Mol W.

: 418.57

Cat No.

: SA22107

Atomoxetine, Impurities

Atomoxetine EP Impurity H

Please enquire for price & pack size

Out of Stock

CAS No.

: 42142-52-9

Mol F.

: C10H15NO

Mol W.

: 165.23

Cat No.

: SA22108