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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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Bosentan, Impurities

Tezosentan

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CAS No.

: 180384-57-0

Mol F.

: C27H27N9O6S

Mol W.

: 605.63

Cat No.

: SA28606

Diazepam, Impurities

Thionordiazepam

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CAS No.

Mol F.

: C15H11ClN2S

Mol W.

: 286.77

Cat No.

: SA20508

Impurities, Levothyroxine

Thyroxine

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CAS No.

: 51-48-9

Mol F.

: C15H11I4NO4

Mol W.

: 776.87

Cat No.

: SA24729

Impurities, Tibolone

Tibolone

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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

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CAS No.

: 32297-45-3

Mol F.

: C21H28O2

Mol W.

: 312.45

Cat No.

: SA21903

Impurities, Ticagrelor

Ticagrelor (1S)-Epimer

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CAS No.

: 2435586-40-4

Mol F.

: C23H28F2N6O4S

Mol W.

: 522.57

Cat No.

: SA32501

Impurities, Ticagrelor

Ticagrelor (2R)-Epimer

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CAS No.

: 2056269-94-2

Mol F.

: C23H28F2N6O4S

Mol W.

: 522.57

Cat No.

: SA32502

Impurities, Ticagrelor

Ticagrelor Acetate

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CAS No.

: 1616703-93-5

Mol F.

: C25H30F2N6O5S

Mol W.

: 564.6

Cat No.

: SA32503

Impurities, Ticagrelor

Ticagrelor Acetonide

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CAS No.

: 274693-26-4

Mol F.

: C26H32F2N6O4S

Mol W.

: 562.63

Cat No.

: SA32504

Impurities, Ticagrelor

Ticagrelor Deshydroxyethyl Impurity

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CAS No.

: 220347-05-7

Mol F.

: C21H24F2N6O3S

Mol W.

: 478.52

Cat No.

: SA32505

Impurities, Ticagrelor

Ticagrelor IP Impurity A

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CAS No.

: 1251765-07-7

Mol F.

: C14H22N6O4S

Mol W.

: 370.43

Cat No.

: SA32507

Impurities, Ticagrelor

Ticagrelor IP Impurity B

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CAS No.

: 1788033-05-5

Mol F.

: C23H28F2N6O4S

Mol W.

: 522.57

Cat No.

: SA32508

Impurities, Tigecycline

Tigecycline

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CAS No.

: 220620-09-7

Mol F.

: C29H39N5O8

Mol W.

: 585.66

Cat No.

: SA48900

Impurities, Timolol

Timolol EP Impurity J

$1,500.00 25 mg

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CAS No.

Mol F.

: C16H32N4O4S

Mol W.

: 376.51

Cat No.

: SA23209

Impurities, Tiotropium

Tiotropium EP Impurity A

$80.00 25 mg

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CAS No.

: 4746-63-8

Mol F.

: C10H8O3S2

Mol W.

: 240.3

Cat No.

: SA11701

Impurities, Tizanidine

Tizanidine | CAS : 51322-75-9

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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

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CAS No.

: 1794829-08-5

Mol F.

: C9H9Cl2N5OS

Mol W.

: 306.2

Cat No.

: SA52113

Impurities, Tizanidine

Tizanidine Dehydro Impurity | CAS : 125292-34-4

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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

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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

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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

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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

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CAS No.

: SA52104

Mol F.

: C8H7ClN4S2

Mol W.

: 258.8

Cat No.

: SA52104

Impurities, Tizanidine

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

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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

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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

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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

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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

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CAS No.

: 104-15-4

Mol F.

: C7H8O3S

Mol W.

: 172.2

Cat No.

: SA52109

Impurities, Tizanidine

Tizanidine Guanidine Impurity | CAS : 125292-37-7

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CAS No.

: 125292-37-7

Mol F.

: C7H6ClN5S

Mol W.

: 227.7

Cat No.

: SA52110

Impurities, Tizanidine

Tizanidine Isothiocyanato Impurity | CAS : 1467836-46-9

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CAS No.

: 1467836-46-9

Mol F.

: C7H2ClN3S2

Mol W.

: 227.7

Cat No.

: SA52115

Impurities, Tizanidine

Tizanidine Lactam Impurity | CAS : 125292-32-2

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CAS No.

: 125292-32-2

Mol F.

: C9H6ClN5OS

Mol W.

: 267.7

Cat No.

: SA52116

Impurities, Nitrosamine, Tizanidine

Tizanidine Nitroso Impurity

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CAS No.

: NA

Mol F.

: C9H7ClN6OS

Mol W.

: 282.7

Cat No.

: SA44671

Impurities, Tizanidine

Tizanidine USP Related Compound B | CAS : 173532-15-5

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CAS No.

: 173532-15-5

Mol F.

: C11H10ClN5OS

Mol W.

: 295.8

Cat No.

: SA52111

Impurities, Tizanidine

Tizanidine USP Related Compound C | CAS : 5391-52-6

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CAS No.

: 5391-52-6

Mol F.

: C5H8N2OS

Mol W.

: 144.2

Cat No.

: SA52112

Impurities, Tofacitinib

Tofacitinib

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CAS No.

: 477600-75-2

Mol F.

: C16H20N6O

Mol W.

: 312.37

Cat No.

: SA43300

Impurities, Tofacitinib

Tofacitinib 5-Oxo Impurity

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CAS No.

: 2101951-20-4

Mol F.

: C16H20N6O2

Mol W.

: 328.4

Cat No.

: SA43313

Impurities, Tofacitinib

Tofacitinib Impurity A

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CAS No.

: 1092578-46-5

Mol F.

: C16H20N6O

Mol W.

: 312.37

Cat No.

: SA43308

Impurities, Tofacitinib

Tofacitinib Impurity B

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CAS No.

: 1092578-48-7

Mol F.

: C16H20N6O

Mol W.

: 312.37

Cat No.

: SA43307

Impurities, Tofacitinib

Tofacitinib N-formyl Impurity

$125.00 25 mg

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CAS No.

: 2227199-28-0

Mol F.

: C14H19N5O

Mol W.

: 273.33

Cat No.

: SA43316

Impurities, Nitrosamine, Tofacitinib

Tofacitinib N-Nitroso Impurity 2

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CAS No.

Mol F.

: C15H17N7O2

Mol W.

: 327.34

Cat No.

: SA43323

Impurities, Tofacitinib

Tofacitinib Trans Impurity

$395.00 25 mg

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CAS No.

Mol F.

: C16H20N6O

Mol W.

: 312.4

Cat No.

: SA43318

Impurities, Tolterodine

Tolterodine Benzopyranone Impurity

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CAS No.

: 16299-22-2

Mol F.

: C16H12O2

Mol W.

: 236.26

Cat No.

: SA28218

Impurities, Tolterodine

Tolterodine dimer impurity

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CAS No.

: 854306-72-2

Mol F.

: C35H41NO2

Mol W.

: 507.7

Cat No.

: SA28209

Impurities, Tolterodine

Tolterodine EP Impurity A

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CAS No.

: 124937-73-1

Mol F.

: C17H20O2

Mol W.

: 256.34

Cat No.

: SA28200

Impurities, Tolterodine

Tolterodine EP Impurity C

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CAS No.

: 124935-89-3

Mol F.

: C23H33NO

Mol W.

: 339.51

Cat No.

: SA28201

Impurities, Tolterodine

Tolterodine EP Impurity D

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CAS No.

: 1391053-65-8

Mol F.

: C20H27NO

Mol W.

: 297.43

Cat No.

: SA28202

Impurities, Tolterodine

Tolterodine EP Impurity E

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CAS No.

: 480432-14-2

Mol F.

: C19H25NO

Mol W.

: 283.41000000000003

Cat No.

: SA28203

Impurities, Tolterodine

Tolterodine EP Impurity F

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CAS No.

: 124937-54-8

Mol F.

: C22H31NO

Mol W.

: 325.49

Cat No.

: SA28204

Impurities, Tolterodine

Tolterodine EP Impurity G

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CAS No.

: NA

Mol F.

: C22H31NO2

Mol W.

: 341.49

Cat No.

: SA28205

Impurities, Tolterodine

Tolterodine lactol impurity

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CAS No.

: 209747-04-6

Mol F.

: C16H16O2

Mol W.

: 240.3

Cat No.

: SA28210

Impurities, Tolterodine

Tolterodine lactone impurity

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CAS No.

: 40546-94-9

Mol F.

: C16H14O2

Mol W.

: 238.28

Cat No.

: SA28211