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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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Budesonide, Impurities

Androstandionic Impurity

$295.00 25 mg

In Stock

CAS No.

: 85234-64-6

Mol F.

: C23H30O5

Mol W.

: 386.49

Cat No.

: SA14121

Apixaban, Impurities

Apixaban

Please enquire for price & pack size

In Stock

CAS No.

: 503612-47-3

Mol F.

: C‚…H‚…N…O„

Mol W.

: 459.5

Cat No.

: SA39900

Apixaban, Impurities

Apixaban 4,5-Dehydro Carboxamide

Please enquire for price & pack size

In Stock

CAS No.

: 1074549-89-5

Mol F.

: C25H23N5O4

Mol W.

: 457.48

Cat No.

: SA39901

Apixaban, Impurities

Apixaban 4,5-Dehydro Carboxylic Acid

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C25H22N4O5

Mol W.

: 458.47

Cat No.

: SA39909

Apixaban, Impurities

Apixaban 4,5-Dehydro Carboxylic Acid Ethyl Ester

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C27H26N4O5

Mol W.

: 486.52

Cat No.

: SA39910

Apixaban, Impurities

Apixaban Amino Acid Impurity; Apixaban open ring acid impurity

$145.00 25 mg

In Stock

CAS No.

: 2206825-87-6; 1188385-73-0 (14-C)

Mol F.

: C25H27N5O5

Mol W.

: 477.5

Cat No.

: SA39922

Apixaban, Impurities

Apixaban aminophenyl Impurity

$125.00 25 mg

In Stock

CAS No.

: 503615-07-4

Mol F.

: C22H22N4O4

Mol W.

: 406.43

Cat No.

: SA39919

Apixaban, Impurities

Apixaban Bihydrolyzed impurity

Please enquire for price & pack size

In Stock

CAS No.

: 2264018-89-3

Mol F.

: C25H26N4O6

Mol W.

: 478.5

Cat No.

: SA39953

Apixaban, Impurities

Apixaban Bromo Ester impurity; Apixaban related compound G

$145.00 25 mg

In Stock

CAS No.

: 881386-12-5

Mol F.

: C27H29BrN4O5

Mol W.

: 569.5

Cat No.

: SA39934

Apixaban, Impurities

Apixaban Carboxylic Acid Impurity

$90.00 25 mg

In Stock

CAS No.

: 503614-92-4

Mol F.

: C25H24N4O5

Mol W.

: 460.48

Cat No.

: SA39904

Apixaban, Impurities

Apixaban Chloro ester impurity; Apixaban related compound H

Please enquire for price & pack size

In Stock

CAS No.

: 1421823-20-2

Mol F.

: C27H29ClN4O5

Mol W.

: 525

Cat No.

: SA39935

Apixaban, Impurities

Apixaban Chloro Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 2029205-64-7

Mol F.

: C24H22ClN5O3

Mol W.

: 463.92

Cat No.

: SA39902

Apixaban, Impurities

Apixaban Ethyl Ester Impurity

$85.00 25 mg

In Stock

CAS No.

: 503614-91-3

Mol F.

: C27H28N4O5

Mol W.

: 488.54

Cat No.

: SA39903

Apixaban, Impurities

Apixaban Impurity III

$125.00 25 mg

In Stock

CAS No.

: 1423803-24-0

Mol F.

: C20H19N5O3

Mol W.

: 377.4

Cat No.

: SA39938

Apixaban, Impurities

Apixaban Isopropyl Ester Impurity

$90.00 25 mg

In Stock

CAS No.

Mol F.

: C28H30N4O5

Mol W.

: 502.56

Cat No.

: SA39905

Apixaban, Impurities

Apixaban Methyl Ester Impurity; Apixaban related compound E

$90.00 25 mg

In Stock

CAS No.

: 1074365-84-6

Mol F.

: C26H26N4O5

Mol W.

: 474.51

Cat No.

: SA39906

Apixaban, Impurities

Apixaban N-formyl impurity

Please enquire for price & pack size

In Stock

CAS No.

: 1351611-14-7

Mol F.

: C26H25N5O5

Mol W.

: 487.51

Cat No.

: SA39933

Apixaban, Impurities

Apixaban N-nitroso-Amino Amide Impurity

$450.00 25 mg

In Stock

CAS No.

Mol F.

: C25H27N7O5

Mol W.

: 505.53

Cat No.

: SA39940

Apixaban, Impurities

Apixaban O-Desmethyl Impurity

$145.00 25 mg

In Stock

CAS No.

: 503612-76-8

Mol F.

: C24H23N5O4

Mol W.

: 445.47

Cat No.

: SA39907

Apixaban, Impurities

Apixaban open ring amide impurity

$145.00 25 mg

In Stock

CAS No.

: 2187409-01-2

Mol F.

: C25H28N6O4

Mol W.

: 476.53

Cat No.

: SA39932

Apixaban, Impurities

Apixaban open ring methyl ester impurity

Please enquire for price & pack size

In Stock

CAS No.

: 2203740-09-2

Mol F.

: C26H29N5O5

Mol W.

: 491.54

Cat No.

: SA39937

Apixaban, Impurities

Apixaban related compound F; Ethyl 1-(4-methoxyphenyl)-6-(4-nitrophenyl)-7-oxo-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxylate

$85.00 25 mg

In Stock

CAS No.

: 536759-91-8

Mol F.

: C22H20N4O6

Mol W.

: 436.42

Cat No.

: SA39918

Apremilast, Impurities

Apremilast 2-Acetamido Benzoic Acid Imurity

$175.00 25 mg

In Stock

CAS No.

: 1809170-71-5

Mol F.

: C22H26N2O8S

Mol W.

: 478.52

Cat No.

: SA30008

Apremilast, Impurities

Apremilast 3-Acetamido Benzoic Acid Imurity

$495.00 25 mg

In Stock

CAS No.

: 2096492-41-8

Mol F.

: C22H26N2O8S

Mol W.

: 478.52

Cat No.

: SA30009

Apremilast, Impurities

Apremilast EP Impurity B

$115.00 25 mg

In Stock

CAS No.

: 15371-06-9

Mol F.

: C10H9NO5

Mol W.

: 223.18

Cat No.

: SA30001

Apremilast, Impurities

Apremilast EP Impurity H

$95.00 25 mg

In Stock

CAS No.

: 253168-94-4

Mol F.

: C₁₂H₁₉NO₄S

Mol W.

: 273.35

Cat No.

: SA30006

Apremilast, Impurities

Apremilast N-Desacetyl Impurity

$155.00 25 mg

In Stock

CAS No.

: 635705-72-5

Mol F.

: C20H22N2O6S

Mol W.

: 418.46

Cat No.

: SA30010

Apremilast, Impurities

Apremilast R-Isomer

$225.00 25 mg

In Stock

CAS No.

: 608141-44-2

Mol F.

: C22H24N2O7S

Mol W.

: 460.5

Cat No.

: SA30007

Aprepitant, Impurities

Aprepitant (R, S, R)-Isomer

$650.00 25 mg

In Stock

CAS No.

: 1185502-97-9

Mol F.

: C23H21F7N4O3

Mol W.

: 534.43

Cat No.

: SA43707

Aprepitant, Impurities

Aprepitant EP Impurity A

$320.00 25 mg

In Stock

CAS No.

: 170729-76-7

Mol F.

: C23H22F6N4O3

Mol W.

: 516.44

Cat No.

: SA43701

Aprepitant, Impurities

Aprepitant EP Impurity D; Ent Aprepitant

$490.00 25 mg

In Stock

CAS No.

: 172822-29-6

Mol F.

: C23H21F7N4O3

Mol W.

: 534.43

Cat No.

: SA43708

Aprepitant, Impurities

Aprepitant EP Impurity E

$250.00 25 mg

In Stock

CAS No.

: 1148113-53-4

Mol F.

: C23H21F7N4O3

Mol W.

: 534.43

Cat No.

: SA43700

Fosaprepitant, Impurities

Aprepitant N-Oxide

$550.00 25 mg

In Stock

CAS No.

: 172673-23-3

Mol F.

: C23H21F7N4O4

Mol W.

: 550.4

Cat No.

: SA45414

Aripiprazole, Impurities

Aripiprazole 3,4-Dichlorophenyl Piperazine Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 57260-67-0 (Base); 88138-89-0 (Salt)

Mol F.

: C10H12Cl2N2

Mol W.

: 231.12

Cat No.

: SA24012

Aripiprazole, Impurities

Aripiprazole Chlorobutoxyquinoline Impurity (USP)

Please enquire for price & pack size

In Stock

CAS No.

: 120004-79-7

Mol F.

: C13H16ClNO2

Mol W.

: 253.72

Cat No.

: SA24015

Aripiprazole, Impurities

Aripiprazole Dehydro Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 129722-25-4 (Free Base); 1008531-60-9 (HCl Salt)

Mol F.

: C23H25Cl2N3O2

Mol W.

: 446.37

Cat No.

: SA24008

Aripiprazole, Impurities

Aripiprazole Desethylene Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 1216394-63-6

Mol F.

: C21H25Cl2N3O2

Mol W.

: 422.35

Cat No.

: SA24016

Aripiprazole, Impurities

Aripiprazole Diquinoline Butanediol Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 882880-12-8

Mol F.

: C22H24N2O4

Mol W.

: 380.44

Cat No.

: SA24005

Aripiprazole, Impurities

Aripiprazole EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 22246-18-0

Mol F.

: C9H9NO2

Mol W.

: 163.17

Cat No.

: SA24000

Aripiprazole, Impurities

Aripiprazole EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 119532-26-2(HClsalt);41202-77-1(base)

Mol F.

: C10H13Cl3N2

Mol W.

: 267.58

Cat No.

: SA24027

Aripiprazole, Impurities

Aripiprazole EP Impurity C

Please enquire for price & pack size

In Stock

CAS No.

: 203395-81-7

Mol F.

: C23H28ClN3O2

Mol W.

: 413.94

Cat No.

: SA24001

Aripiprazole, Impurities

Aripiprazole EP Impurity D

Please enquire for price & pack size

In Stock

CAS No.

: 203395-82-8

Mol F.

: C23H28ClN3O2

Mol W.

: 413.94

Cat No.

: SA24002

Aripiprazole, Impurities

Aripiprazole EP Impurity F

Please enquire for price & pack size

In Stock

CAS No.

: 573691-09-5

Mol F.

: C23H27Cl2N3O3

Mol W.

: 464.38

Cat No.

: SA24003

Aripiprazole, Impurities

Aripiprazole EP Impurity G

Please enquire for price & pack size

In Stock

CAS No.

: 1797986-18-5

Mol F.

: C48H56Cl4N6O4

Mol W.

: 922.81

Cat No.

: SA24004

Aripiprazole, Impurities

Aripiprazole Hydroxybutylpiperazine Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 870765-38-1

Mol F.

: C14H21Cl3N2O

Mol W.

: 303.23

Cat No.

: SA24017

Aripiprazole, Impurities

Aripiprazole Impurity 2

Please enquire for price & pack size

In Stock

CAS No.

: 1424857-93-1

Mol F.

: C14H18Cl2N2

Mol W.

: 285.21

Cat No.

: SA24006

Aripiprazole, Impurities

Aripiprazole Impurity 3

Please enquire for price & pack size

In Stock

CAS No.

: 1359829-23-4

Mol F.

: C13H15NO2

Mol W.

: 217.26

Cat No.

: SA24007

Aripiprazole, Impurities

Aripiprazole Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 1424858-02-5

Mol F.

: C26H32N2O5

Mol W.

: 452.54

Cat No.

: SA24029

Aripiprazole, Impurities

Aripiprazole Iodo butoxyquinoline

Please enquire for price & pack size

In Stock

CAS No.

: 952308-47-3

Mol F.

: C13H16INO2

Mol W.

: 345.18

Cat No.

: SA24026

Aripiprazole, Impurities

Aripiprazole N-Bromobutyl Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 1424857-68-0

Mol F.

: C13H16BrNO2

Mol W.

: 298.18

Cat No.

: SA24019