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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-(benzo[b]thiophen-5-yl)pipe

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C17H22N2O2S

Mol W.

: 318.44

Cat No.

: SA41327

Brexpiprazole, Impurities

tert-Butyl 4-(benzo[b]thiophen-7-yl)piperazine

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C17H22N2O2S

Mol W.

: 318.44

Cat No.

: SA41326

Impurities, Sitagliptin

tert-Butyl 8-Oxo-3-(trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazine-7(8H)-carboxylate

$395.00 25 mg

In Stock

CAS No.

: 877402-44-3

Mol F.

: C11H13F3N4O3

Mol W.

: 306.24

Cat No.

: SA10433

Dapagliflozin, Impurities

Tert-butyl(4-(2-chlorobenzyl)phenoxy)dimethylsilane

$218.00 25 mg

In Stock

CAS No.

Mol F.

: C19H25ClOSi

Mol W.

: 332.94

Cat No.

: SA15034

Impurities, Testosterone

Testosterone 17-phenylpropionate

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In Stock

CAS No.

: 1255-49-8

Mol F.

: C28H36O3

Mol W.

: 420.59

Cat No.

: SA16227

Impurities, Testosterone

Testosterone API

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In Stock

CAS No.

: 58-22-0

Mol F.

: C19H28O2

Mol W.

: 288.424

Cat No.

: SA16228

Impurities, Testosterone

Testosterone EP Impurity A

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In Stock

CAS No.

: 63-05-8

Mol F.

: C19H26O2

Mol W.

: 286.41

Cat No.

: SA16203

Impurities, Testosterone

Testosterone EP Impurity C

Please enquire for price & pack size

In Stock

CAS No.

: 481-30-1

Mol F.

: C19H28O2

Mol W.

: 288.4

Cat No.

: SA16205

Impurities, Testosterone

Testosterone EP Impurity D

Please enquire for price & pack size

In Stock

CAS No.

: 1156-92-9

Mol F.

: C19H30O2

Mol W.

: 290.4

Cat No.

: SA16206

Impurities, Testosterone

Testosterone EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 1045-69-8

Mol F.

: C21H30O3

Mol W.

: 330.46

Cat No.

: SA16207

Impurities, Testosterone

Testosterone EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C30H48O3

Mol W.

: 456.7

Cat No.

: SA16202

Impurities, Testosterone

Testosterone EP Impurity F

Please enquire for price & pack size

In Stock

CAS No.

: 521-18-6

Mol F.

: C19H30O2

Mol W.

: 290.4

Cat No.

: SA16208

Impurities, Testosterone

Testosterone EP Impurity G

Please enquire for price & pack size

In Stock

CAS No.

: 897-06-3

Mol F.

: C19H24O2

Mol W.

: 284.4

Cat No.

: SA16209

Impurities, Testosterone

Testosterone EP Impurity H

Please enquire for price & pack size

In Stock

CAS No.

: 846-48-0

Mol F.

: C19H26O2

Mol W.

: 286.4

Cat No.

: SA16210

Impurities, Testosterone

Testosterone EP Impurity I

Please enquire for price & pack size

In Stock

CAS No.

: 2484-30-2

Mol F.

: C19H26O2

Mol W.

: 286.4

Cat No.

: SA16211

Impurities, Tibolone

Tibolone EP impurity A

$400.00 25 mg

In Stock

CAS No.

: 105186-35-4

Mol F.

: C21H28O3

Mol W.

: 328.45

Cat No.

: SA21900

Impurities, Tibolone

Tibolone EP impurity B

$400.00 25 mg

In Stock

CAS No.

: 105186-34-3

Mol F.

: C21H28O4

Mol W.

: 344.45

Cat No.

: SA21901

Impurities, Tibolone

Tibolone EP impurity C

$400.00 25 mg

In Stock

CAS No.

: 1162-60-3

Mol F.

: C21H28O2

Mol W.

: 312.45

Cat No.

: SA21902

Impurities, Tibolone

Tibolone EP impurity E

$100.00 25 mg

In Stock

CAS No.

: 105186-33-2

Mol F.

: C23H34O3

Mol W.

: 358.52

Cat No.

: SA21904

Impurities, Ticagrelor

Ticagrelor

Please enquire for price & pack size

In Stock

CAS No.

: 274693-27-5

Mol F.

: C23H28F2N6O4S

Mol W.

: 522.57

Cat No.

: SA32500

Impurities, Ticagrelor

Ticagrelor Impurity E (Mandelate salt)

Please enquire for price & pack size

In Stock

CAS No.

: 376608-71-8

Mol F.

: C17H17F2NO3

Mol W.

: 321.32

Cat No.

: SA32527

Impurities, Ticagrelor

Ticagrelor Sulfone Impurity; Ticagrelor Impurity M

Please enquire for price & pack size

In Stock

CAS No.

: 274693-39-9

Mol F.

: C23H28F2N6O6S

Mol W.

: 554.57

Cat No.

: SA32525

Impurities, Ticagrelor

Ticagrelor Sulfoxide

Please enquire for price & pack size

In Stock

CAS No.

: 1644461-85-7

Mol F.

: C23H28F2N6O5S

Mol W.

: 538.57

Cat No.

: SA32506

Impurities, Timolol

Timolol EP Impurity A

$350.00 25 mg

In Stock

CAS No.

: 26839-76-9 (Free Base); 26839-77-0

Mol F.

: C13H24N4O3S

Mol W.

: 316.42

Cat No.

: SA23200

Impurities, Timolol

Timolol EP Impurity B

$380.00 25 mg

In Stock

CAS No.

: 59697-06-2

Mol F.

: C13H24N4O3S

Mol W.

: 316.42

Cat No.

: SA23201

Impurities, Timolol

Timolol EP Impurity C

$490.00 25 mg

In Stock

CAS No.

: 610271-56-2; 610271-57-3

Mol F.

: C19H31N7O4S2

Mol W.

: 485.62

Cat No.

: SA23202

Impurities, Timolol

Timolol EP Impurity D

$150.00 25 mg

In Stock

CAS No.

: 30165-97-0

Mol F.

: C6H9N3O2S

Mol W.

: 187.22

Cat No.

: SA23203

Impurities, Timolol

Timolol EP Impurity E

$650.00 25 mg

In Stock

CAS No.

: 1026075-53-5

Mol F.

: C17H26N4O6S

Mol W.

: 414.48

Cat No.

: SA23204

Impurities, Timolol

Timolol EP Impurity F

$80.00 25 mg

In Stock

CAS No.

: 30165-96-9

Mol F.

: C6H8ClN3OS

Mol W.

: 205.67

Cat No.

: SA23205

Impurities, Timolol

Timolol EP Impurity G

$450.00 25 mg

In Stock

CAS No.

: 75202-36-7

Mol F.

: C6H9N3O3S

Mol W.

: 203.22

Cat No.

: SA23206

Impurities, Timolol

Timolol EP Impurity H

$750.00 25 mg

In Stock

CAS No.

: 158636-97-6

Mol F.

: C13H24N4O3S

Mol W.

: 316.42

Cat No.

: SA23207

Impurities, Timolol

Timolol EP Impurity I

$350.00 25 mg

In Stock

CAS No.

: 2469037-77-0

Mol F.

: C11H20N4O3S

Mol W.

: 288.37

Cat No.

: SA23208

Impurities, Timolol

Timolol Maleate

$100.00 25 mg

In Stock

CAS No.

: 26921-17-5

Mol F.

: C17H28N4O7S

Mol W.

: 432.49

Cat No.

: SA23210

Impurities, Nitrosamine

Timolol Nitrosamine

$155.00 25 mg

In Stock

CAS No.

Mol F.

: C13H23N5O4S

Mol W.

: 345.42

Cat No.

: SA23223

Impurities, Tiotropium

Tiotropium Bromide EP Impurity C

$195.00 25 mg

In Stock

CAS No.

: 136310-95-7

Mol F.

: C19H22NBrO3S2

Mol W.

: 456.42

Cat No.

: SA11703

Impurities, Tiotropium

Tiotropium EP Impurity B

$100.00 25 mg

In Stock

CAS No.

: 136310-64-0

Mol F.

: C18H19NO4S2

Mol W.

: 377.48

Cat No.

: SA11702

Impurities, Tiotropium

Tiotropium EP Impurity D

$150.00 25 mg

In Stock

CAS No.

: 136310-66-2

Mol F.

: C18H19NO3S2

Mol W.

: 361.48

Cat No.

: SA11704

Impurities, Tiotropium

Tiotropium EP Impurity E

$80.00 25 mg

In Stock

CAS No.

: 26447-85-8

Mol F.

: C11H10O3S2

Mol W.

: 254.33

Cat No.

: SA11705

Impurities, Tiotropium

Tiotropium EP Impurity F

$70.00 25 mg

In Stock

CAS No.

: 704-38-1

Mol F.

: C9H6OS2

Mol W.

: 194.27

Cat No.

: SA11706

Impurities, Tiotropium

Tiotropium EP Impurity G

$195.00 25 mg

In Stock

CAS No.

: 1508-46-9

Mol F.

: C9H16NBrO2

Mol W.

: 250.13

Cat No.

: SA11707

Impurities, Tiotropium

Tiotropium EP Impurity H

$195.00 25 mg

In Stock

CAS No.

: 845870-40-8

Mol F.

: C9H16BrNO2

Mol W.

: 250.13

Cat No.

: SA11708

Impurities, Tiotropium

Tiotropium EP Impurity I

$750.00 25 mg

In Stock

CAS No.

: 136521-48-7

Mol F.

: C19H22BrNO4S2

Mol W.

: 472.42

Cat No.

: SA11709

Impurities, Tiotropium

Tiotropium EP Impurity K

$350.00 25 mg

In Stock

CAS No.

Mol F.

: C19H19NO5S2

Mol W.

: 405.49

Cat No.

: SA11711

Impurities, Tiotropium

Tiotropium Impurity J Iodo

$950.00 25 mg

In Stock

CAS No.

Mol F.

: C19H22ClNO3IS2

Mol W.

: 537.87

Cat No.

: SA11710

Impurities, Tiotropium

Tiotropium Impurity M

$695.00 25 mg

In Stock

CAS No.

: 736108-96-6

Mol F.

: C18H19NO3S2

Mol W.

: 377.5

Cat No.

: SA11721

Impurities, Tiotropium

Tiotropium Impurity N

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C19H22NO4S2

Mol W.

: 392.5

Cat No.

: SA11724

Impurities, Tofacitinib

Tofacitinib (3S,4S)-Isomer

$775.00 25 mg

In Stock

CAS No.

: 1092578-47-6 (base); 2174011-55-1 (citrate salt)

Mol F.

: C16H20N6O (base)

Mol W.

: 312.37

Cat No.

: SA43302

Impurities, Tofacitinib

Tofacitinib Amine impurity

$125.00 25 mg

In Stock

CAS No.

: 477600-74-1 (Base); 1260590-51-9 (HCl); 1655430-59-3 (2HCl)

Mol F.

: C13H19N5

Mol W.

: 245.32

Cat No.

: SA43306

Impurities, Tofacitinib

Tofacitinib Benzyl Impurity

$90.00 25 mg

In Stock

CAS No.

: 477600-73-0

Mol F.

: C20H25N5

Mol W.

: 335.45

Cat No.

: SA43303

Impurities, Tofacitinib

Tofacitinib Citrate

Please enquire for price & pack size

In Stock

CAS No.

: 540737-29-9

Mol F.

: C22H28N6O8

Mol W.

: 504.49

Cat No.

: SA43301