Home / Products / Impurities

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.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Rosuvastatin

tert-butyl 2-((4S,6S)-2,2-dimethyl-6-((5-methyl-1,3,4-thiadiazol-2-ylsulfonyl)methyl)-1,3-dioxan-4-yl)acetate

$995.00 50 mg

PLEASE ENQUIRE

CAS No.

Mol F.

: C16H26N2O6S2

Mol W.

: 406.52

Cat No.

: SA121128

Impurities, Palbociclib

Tert-butyl 2-(6-aminopyridin-3-ylamino)ethylcarbamate

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1367858-24-9

Mol F.

: C12H20N4O2

Mol W.

: 252.3

Cat No.

: SA40420

Impurities, Palbociclib

tert-Butyl 4-(2-nitropyridin-3-yl)piperazine-1-carboxylate

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1779124-68-3

Mol F.

: C14H20N4O4

Mol W.

: 308.33

Cat No.

: SA40431

Brexpiprazole, Impurities

tert-Butyl 4-(4-(2-oxo-1,2-dihydroquinolin-7-yloxy)butyl)piperazine-1-carboxylate

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C22H31N3O4

Mol W.

: 401.5

Cat No.

: SA41336

Impurities, Palbociclib

tert-Butyl 4-(6-(hydroxyamino)pyridin-3-yl)piperazine-1-carboxylate

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C14H22N4O3

Mol W.

: 294.35

Cat No.

: SA40433

Impurities, Rosuvastatin

tert-Butyl 6-Chloro-(R)-hydroxy-3-oxohexanoate

$150.00 25 mg

PLEASE ENQUIRE

CAS No.

: 404958-08-3

Mol F.

: C10H17ClO4

Mol W.

: 236.69

Cat No.

: SA12152

Cetirizine, Impurities

tert-Butyl Cetirizine

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 335017-46-4

Mol F.

: C₂₅H₃₃ClN₂O₃

Mol W.

: 444.99

Cat No.

: SA13512

Impurities, Terbinafine

tert-Butylethyne

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 917-92-0

Mol F.

: C6H10

Mol W.

: 82.14

Cat No.

: SA25714

Impurities, Testosterone

Testosterone Cypionate

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 58-20-8

Mol F.

: C27H40O3

Mol W.

: 412.61

Cat No.

: SA16220

Dapagliflozin, Impurities

Tetraacetate Bromo Dapagliflozin

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1807632-96-7

Mol F.

: C29H33BrO10

Mol W.

: 621.48

Cat No.

: SA15065

Dapagliflozin, Impurities

Tetraacetate Deschloro Dapagliflozin

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 2437569-58-7

Mol F.

: C29H34O10

Mol W.

: 542.58

Cat No.

: SA15066

Dapagliflozin, Impurities

Tetraacetate o-Bromo Dapagliflozin

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C29H33BrO10

Mol W.

: 621.47

Cat No.

: SA15068

Dapagliflozin, Impurities

Tetraacetate o-Chloro Dapagliflozin

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C29H33ClO10

Mol W.

: 577

Cat No.

: SA15067

Impurities, Tetracaine

Tetracaine (API) | CAS : 94-24-6

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 94-24-6

Mol F.

: C15H24N2O2

Mol W.

: 264.2

Cat No.

: SA52600

Impurities, Tetracaine

Tetracaine EP Impurity A | CAS : 150-13-0

$155.00 1 g

PLEASE ENQUIRE

CAS No.

: 150-13-0

Mol F.

: C7H7NO2

Mol W.

: 137.1

Cat No.

: SA52601

Impurities, Tetracaine

Tetracaine EP Impurity B | CAS : 4740-24-3

$155.00 1 g

PLEASE ENQUIRE

CAS No.

: 4740-24-3

Mol F.

: C11H15NO2

Mol W.

: 193.3

Cat No.

: SA52602

Impurities, Tetracaine

Tetracaine EP Impurity C | CAS : 71839-12-8

$255.00 100 mg

PLEASE ENQUIRE

CAS No.

: 71839-12-8

Mol F.

: C12H17NO2

Mol W.

: 207.3

Cat No.

: SA52603

Empagliflozin, Impurities

Tetrahydrofuran-3-yl 4-hydroxybutanoate

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C8H14O4

Mol W.

: 174.19

Cat No.

: SA15147

Deferasirox, Impurities

Tetrasalicylide

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 6543-57-3

Mol F.

: C28H16O8

Mol W.

: 480.42

Cat No.

: SA25113

Bosentan, Impurities

Tezosentan

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 180384-57-0

Mol F.

: C27H27N9O6S

Mol W.

: 605.63

Cat No.

: SA28606

Diazepam, Impurities

Thionordiazepam

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C15H11ClN2S

Mol W.

: 286.77

Cat No.

: SA20508

Impurities, Levothyroxine

Thyroxine

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 51-48-9

Mol F.

: C15H11I4NO4

Mol W.

: 776.87

Cat No.

: SA24729

Impurities, Tibolone

Tibolone

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 5630-53-5

Mol F.

: C21H28O2

Mol W.

: 312.44

Cat No.

: SA21905

Impurities, Tibolone

Tibolone EP impurity D

$1,800.00 25 mg

PLEASE ENQUIRE

CAS No.

: 32297-45-3

Mol F.

: C21H28O2

Mol W.

: 312.45

Cat No.

: SA21903

Impurities, Ticagrelor

Ticagrelor (1S)-Epimer

$2,995.00 100 mg

PLEASE ENQUIRE

CAS No.

: 2435586-40-4

Mol F.

: C23H28F2N6O4S

Mol W.

: 522.57

Cat No.

: SA32501

Impurities, Ticagrelor

Ticagrelor (2R)-Epimer

$2,995.00 100 mg

PLEASE ENQUIRE

CAS No.

: 2056269-94-2

Mol F.

: C23H28F2N6O4S

Mol W.

: 522.57

Cat No.

: SA32502

Impurities, Ticagrelor

Ticagrelor Acetate

$295.00 100 mg

PLEASE ENQUIRE

CAS No.

: 1616703-93-5

Mol F.

: C25H30F2N6O5S

Mol W.

: 564.6

Cat No.

: SA32503

Impurities, Ticagrelor

Ticagrelor Acetonide

$195.00 100 mg

PLEASE ENQUIRE

CAS No.

: 274693-26-4

Mol F.

: C26H32F2N6O4S

Mol W.

: 562.63

Cat No.

: SA32504

Impurities, Ticagrelor

Ticagrelor Deshydroxyethyl Impurity

$1,195.00 100 mg

PLEASE ENQUIRE

CAS No.

: 220347-05-7

Mol F.

: C21H24F2N6O3S

Mol W.

: 478.52

Cat No.

: SA32505

Impurities, Ticagrelor

Ticagrelor IP Impurity A

$295.00 100 mg

PLEASE ENQUIRE

CAS No.

: 1251765-07-7

Mol F.

: C14H22N6O4S

Mol W.

: 370.43

Cat No.

: SA32507

Impurities, Ticagrelor

Ticagrelor IP Impurity B

$455.00 100 mg

PLEASE ENQUIRE

CAS No.

: 1788033-05-5

Mol F.

: C23H28F2N6O4S

Mol W.

: 522.57

Cat No.

: SA32508

Impurities, Ticagrelor

Ticagrelor Triazole (S,R) Cyclopropyl Isomer

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C23H28F2N6O4S

Mol W.

: 522.57

Cat No.

: SA32528

Impurities, Tigecycline

Tigecycline

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 220620-09-7

Mol F.

: C29H39N5O8

Mol W.

: 585.66

Cat No.

: SA48900

Impurities, Timolol

Timolol EP Impurity J

$1,200.00 25 mg

PLEASE ENQUIRE

CAS No.

Mol F.

: C16H32N4O4S

Mol W.

: 376.51

Cat No.

: SA23209

Impurities, Tiotropium

Tiotropium EP Impurity A

$80.00 25 mg

PLEASE ENQUIRE

CAS No.

: 4746-63-8

Mol F.

: C10H8O3S2

Mol W.

: 240.3

Cat No.

: SA11701

Impurities, Tizanidine

Tizanidine | CAS : 51322-75-9

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 51322-75-9

Mol F.

: C9H8ClN5S

Mol W.

: 253.7

Cat No.

: SA52100

Impurities, Tizanidine

Tizanidine 5-Hydroxy Impurity | CAS : 1794829-08-5

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1794829-08-5

Mol F.

: C9H9Cl2N5OS

Mol W.

: 306.2

Cat No.

: SA52113

Impurities, Tizanidine

Tizanidine Dehydro Impurity | CAS : 125292-34-4

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 125292-34-4

Mol F.

: C9H6ClN5S

Mol W.

: 251.7

Cat No.

: SA52114

Impurities, Tizanidine

Tizanidine EP Impurity A | CAS : 51322-69-1

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 51322-69-1

Mol F.

: C9H9N5S

Mol W.

: 219.3

Cat No.

: SA52101

Impurities, Tizanidine

Tizanidine EP Impurity B | CAS : 51323-05-8

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 51323-05-8

Mol F.

: C7H5ClN4S2

Mol W.

: 244.7

Cat No.

: SA52102

Impurities, Tizanidine

Tizanidine EP Impurity C | CAS : 1147548-83-1

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1147548-83-1

Mol F.

: C16H14Cl2N10S2

Mol W.

: 481.4

Cat No.

: SA52103

Impurities, Tizanidine

Tizanidine EP Impurity D | CAS : 560120-68-5

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: SA52104

Mol F.

: C8H7ClN4S2

Mol W.

: 258.8

Cat No.

: SA52104

Impurities, Tizanidine

Tizanidine EP Impurity E | CAS : 30536-19-7

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 30536-19-7

Mol F.

: C6H4ClN3S

Mol W.

: 185.6

Cat No.

: SA52105

Impurities, Tizanidine

Tizanidine EP Impurity F | CAS : 1147548-85-3

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1147548-85-3

Mol F.

: C16H11Cl2N9S2

Mol W.

: 464.4

Cat No.

: SA52106

Impurities, Tizanidine

Tizanidine EP Impurity G | CAS : 51322-80-6

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 51322-80-6

Mol F.

: C7H3ClN4S

Mol W.

: 210.6

Cat No.

: SA52107

Impurities, Tizanidine

Tizanidine EP Impurity H | CAS : 107-15-3

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 107-15-3

Mol F.

: C2H8N2

Mol W.

: 60.1

Cat No.

: SA52108

Impurities, Tizanidine

Tizanidine EP Impurity I | CAS : 104-15-4

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 104-15-4

Mol F.

: C7H8O3S

Mol W.

: 172.2

Cat No.

: SA52109

Impurities, Tizanidine

Tizanidine Guanidine Impurity | CAS : 125292-37-7

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 125292-37-7

Mol F.

: C7H6ClN5S

Mol W.

: 227.7

Cat No.

: SA52110

Impurities, Tizanidine

Tizanidine Isothiocyanato Impurity | CAS : 1467836-46-9

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1467836-46-9

Mol F.

: C7H2ClN3S2

Mol W.

: 227.7

Cat No.

: SA52115

Impurities, Tizanidine

Tizanidine Lactam Impurity | CAS : 125292-32-2

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 125292-32-2

Mol F.

: C9H6ClN5OS

Mol W.

: 267.7

Cat No.

: SA52116