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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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Brexpiprazole, Impurities

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

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Out of Stock

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

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Out of Stock

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

Out of Stock

CAS No.

: 404958-08-3

Mol F.

: C10H17ClO4

Mol W.

: 236.69

Cat No.

: SA12152

Cetirizine, Impurities

tert-Butyl Cetirizine

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Out of Stock

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

Out of Stock

CAS No.

: 917-92-0

Mol F.

: C6H10

Mol W.

: 82.14

Cat No.

: SA25714

Impurities, Testosterone

Testosterone Cypionate

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Out of Stock

CAS No.

: 58-20-8

Mol F.

: C27H40O3

Mol W.

: 412.61

Cat No.

: SA16220

Dapagliflozin, Impurities

Tetraacetate Bromo Dapagliflozin

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Out of Stock

CAS No.

: 1807632-96-7

Mol F.

: C29H33BrO10

Mol W.

: 621.48

Cat No.

: SA15065

Dapagliflozin, Impurities

Tetraacetate Deschloro Dapagliflozin

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Out of Stock

CAS No.

: 2437569-58-7

Mol F.

: C29H34O10

Mol W.

: 542.58

Cat No.

: SA15066

Dapagliflozin, Impurities

Tetraacetate o-Bromo Dapagliflozin

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Out of Stock

CAS No.

Mol F.

: C29H33BrO10

Mol W.

: 621.47

Cat No.

: SA15068

Dapagliflozin, Impurities

Tetraacetate o-Chloro Dapagliflozin

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Out of Stock

CAS No.

Mol F.

: C29H33ClO10

Mol W.

: 577

Cat No.

: SA15067

Empagliflozin, Impurities

Tetrahydrofuran-3-yl 4-hydroxybutanoate

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Out of Stock

CAS No.

Mol F.

: C8H14O4

Mol W.

: 174.19

Cat No.

: SA15147

Deferasirox, Impurities

Tetrasalicylide

Please enquire for price & pack size

Out of Stock

CAS No.

: 6543-57-3

Mol F.

: C28H16O8

Mol W.

: 480.42

Cat No.

: SA25113

Bosentan, Impurities

Tezosentan

Please enquire for price & pack size

Out of Stock

CAS No.

: 180384-57-0

Mol F.

: C27H27N9O6S

Mol W.

: 605.63

Cat No.

: SA28606

Diazepam, Impurities

Thionordiazepam

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C15H11ClN2S

Mol W.

: 286.77999999999997

Cat No.

: SA20508

Impurities, Levothyroxine

Thyroxine

Please enquire for price & pack size

Out of Stock

CAS No.

: 51-48-9

Mol F.

: C15H11I4NO4

Mol W.

: 776.87

Cat No.

: SA24729

Impurities, Tibolone

Tibolone

Please enquire for price & pack size

Out of Stock

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

Out of Stock

CAS No.

: 32297-45-3

Mol F.

: C21H28O2

Mol W.

: 312.45

Cat No.

: SA21903

Impurities, Ticagrelor

Ticagrelor (1S)-Epimer

Please enquire for price & pack size

Out of Stock

CAS No.

: 2435586-40-4

Mol F.

: C23H28F2N6O4S

Mol W.

: 522.57

Cat No.

: SA32501

Impurities, Ticagrelor

Ticagrelor (2R)-Epimer

Please enquire for price & pack size

Out of Stock

CAS No.

: 2056269-94-2

Mol F.

: C23H28F2N6O4S

Mol W.

: 522.57

Cat No.

: SA32502

Impurities, Ticagrelor

Ticagrelor Acetate

Please enquire for price & pack size

Out of Stock

CAS No.

: 1616703-93-5

Mol F.

: C25H30F2N6O5S

Mol W.

: 564.6

Cat No.

: SA32503

Impurities, Ticagrelor

Ticagrelor Acetonide

Please enquire for price & pack size

Out of Stock

CAS No.

: 274693-26-4

Mol F.

: C26H32F2N6O4S

Mol W.

: 562.63

Cat No.

: SA32504

Impurities, Ticagrelor

Ticagrelor Deshydroxyethyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 220347-05-7

Mol F.

: C21H24F2N6O3S

Mol W.

: 478.52

Cat No.

: SA32505

Impurities, Ticagrelor

Ticagrelor IP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 1251765-07-7

Mol F.

: C14H22N6O4S

Mol W.

: 370.43

Cat No.

: SA32507

Impurities, Ticagrelor

Ticagrelor IP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 1788033-05-5

Mol F.

: C23H28F2N6O4S

Mol W.

: 522.57

Cat No.

: SA32508

Impurities, Tigecycline

Tigecycline

Please enquire for price & pack size

Out of Stock

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

Out of Stock

CAS No.

Mol F.

: C16H32N4O4S

Mol W.

: 376.51

Cat No.

: SA23209

Impurities, Tiotropium

Tiotropium EP Impurity A

$80.00 25 mg

Out of Stock

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

Out of Stock

CAS No.

: 51322-75-9

Mol F.

: C9H8ClN5S

Mol W.

: 253.7

Cat No.

: SA52100

Impurities, Tizanidine

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

Please enquire for price & pack size

Out of Stock

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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Out of Stock

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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Out of Stock

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

Out of Stock

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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Out of Stock

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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Out of Stock

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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Out of Stock

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

Out of Stock

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

Out of Stock

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

Out of Stock

CAS No.

: 125292-37-7

Mol F.

: C7H6ClN5S

Mol W.

: 227.7

Cat No.

: SA52110

Impurities, Nitrosamine

Tizanidine Nitroso Impurity

Please enquire for price & pack size

Out of Stock

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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Out of Stock

CAS No.

: 173532-15-5

Mol F.

: C11H10ClN5OS

Mol W.

: 295.8

Cat No.

: SA52111

Impurities, Tofacitinib

Tofacitinib

Please enquire for price & pack size

Out of Stock

CAS No.

: 477600-75-2

Mol F.

: C16H20N6O

Mol W.

: 312.37

Cat No.

: SA43300

Impurities, Tofacitinib

Tofacitinib 5-Oxo Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 2101951-20-4

Mol F.

: C16H20N6O2

Mol W.

: 328.4

Cat No.

: SA43313

Impurities, Tofacitinib

Tofacitinib Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 1092578-46-5

Mol F.

: C16H20N6O

Mol W.

: 312.37

Cat No.

: SA43308

Impurities, Tofacitinib

Tofacitinib Impurity B

Please enquire for price & pack size

Out of Stock

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

Out of Stock

CAS No.

: 2227199-28-0

Mol F.

: C14H19N5O

Mol W.

: 273.33

Cat No.

: SA43316

Impurities, Tofacitinib

Tofacitinib N-Nitroso Impurity 2

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C15H17N7O2

Mol W.

: 327.34

Cat No.

: SA43323

Impurities, Tofacitinib

Tofacitinib Trans Impurity

$395.00 25 mg

Out of Stock

CAS No.

Mol F.

: C16H20N6O

Mol W.

: 312.4

Cat No.

: SA43318

Impurities, Tolterodine

Tolterodine Benzopyranone Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 16299-22-2

Mol F.

: C16H12O2

Mol W.

: 236.26

Cat No.

: SA28218

Impurities, Tolterodine

Tolterodine dimer impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 854306-72-2

Mol F.

: C35H41NO2

Mol W.

: 507.7

Cat No.

: SA28209

Impurities, Tolterodine

Tolterodine EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 124937-73-1

Mol F.

: C17H20O2

Mol W.

: 256.34

Cat No.

: SA28200