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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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Exemestane, Impurities

6-Oxirane Boldenone

Please enquire for price & pack size

Out of Stock

CAS No.

: 1331732-05-8

Mol F.

: C20H26O3

Mol W.

: 314.42

Cat No.

: SA19113

Impurities, Oxymetazoline

6-tert-Butyl-2,4-xylenol

Please enquire for price & pack size

Out of Stock

CAS No.

: 1879-09-0

Mol F.

: C12H18O

Mol W.

: 178.28

Cat No.

: SA44208

Impurities, Raloxifene

6-tert-Butyldimethylsilyl-4’-hydroxy Raloxifene

Please enquire for price & pack size

Out of Stock

CAS No.

: 174264-47-2

Mol F.

: C34H41NO4SSi

Mol W.

: 587.85

Cat No.

: SA24909

Hydrocortisone Valerate, Impurities

6-α-hydroxyhydrocorti-17-Valerate

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C26H38O7

Mol W.

: 462.57

Cat No.

: SA27312

Betamethasone Valerate, Impurities

6-β-Bromo Isomer

$355.00 25 mg

Out of Stock

CAS No.

Mol F.

: C27H36BrFO6

Mol W.

: 555.49

Cat No.

: SA18510

Hydrocortisone Valerate, Impurities

6-β-Hydroxy-hydrocorti-17-valerate

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C26H38O7

Mol W.

: 462.57

Cat No.

: SA27313

Buspirone, Impurities

6,10-Dihydroxy Buspirone

$1,250.00 25 mg

Out of Stock

CAS No.

: 658701-59-8

Mol F.

: C21H31N5O4

Mol W.

: 417.5

Cat No.

: SA25817

Halcinonide, Impurities

6,11-DiKeto Halcinonide

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H28ClFO6

Mol W.

: 466.92

Cat No.

: SA30409

Impurities, Terbinafine

6,6-Dimethyl-2,4-heptadiyn-1-ol

Please enquire for price & pack size

Out of Stock

CAS No.

: 114311-73-8

Mol F.

: C9H12O

Mol W.

: 136.19

Cat No.

: SA25721

Impurities, Niacin

6,6′-Dinicotinic acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 1802-30-8

Mol F.

: C12H8N2O4

Mol W.

: 244.2

Cat No.

: SA33104

Impurities, Pregabalin

6,6’-Dihydroxypregabalin Hydrochloride

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C8H17NO4.HCl

Mol W.

: 227.68

Cat No.

: SA24812

Impurities, Pregabalin

6,6’-Dihydroxypregabalin Lactam

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C8H15NO3

Mol W.

: 173.21

Cat No.

: SA24813

Erlotinib, Impurities

6,7-Bis(2-methoxyethoxy)-N-phenylquinazolin-4-amine

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C20H23O4N3

Mol W.

: 369.41

Cat No.

: SA25230

Impurities, Triamcinolone Acetonide

6,7-Dehydro Triamcinolone Acetonide

$295.00 25 mg

Out of Stock

CAS No.

: 1893-84-1

Mol F.

: C₂₄H₂₉FO₆

Mol W.

: 432.48

Cat No.

: SA30209

Impurities, Mometasone

6,7-Didehydro Mometasone Furoate

$395.00 25 mg

Out of Stock

CAS No.

Mol F.

: C27H28Cl2O6

Mol W.

: 519.41

Cat No.

: SA28712

Impurities, Rosuvastatin

6,7-Dihydro O-Butyl-rosuvastatin

$350.00 25 mg

Out of Stock

CAS No.

Mol F.

: C26H38FN3O4S

Mol W.

: 539.66

Cat No.

: SA12141

Impurities, Rosuvastatin

6,7-Dihydro Rosuvastatin Acetonide tert-Butyl Ester

$250.00 25 mg

Out of Stock

CAS No.

Mol F.

: C29H42FN3O6S

Mol W.

: 579.72

Cat No.

: SA12142

Equilin, Impurities

6,7-Estradiol 3,17-Diacetate

Please enquire for price & pack size

Out of Stock

CAS No.

: 1971-65-9

Mol F.

: C₂₂H₂₆O₄

Mol W.

: 354.44

Cat No.

: SA16405

Bromhexine, Impurities

6,8-Dibromo-3-cyclohexyl-2,3-dihydroquinazolin-4(1H)-one

Please enquire for price & pack size

Out of Stock

CAS No.

: 2512203-87-9

Mol F.

: C14H16Br2N2O

Mol W.

: 388.1

Cat No.

: SA28408

Impurities, Testosterone

6alpha-Hydroxytestosterone

Please enquire for price & pack size

Out of Stock

CAS No.

: 2944-87-8

Mol F.

: C19H28O3

Mol W.

: 304.43

Cat No.

: SA16215

Impurities, Nandrolone

6ß-Hydroxynandrolone

Please enquire for price & pack size

Out of Stock

CAS No.

: 4146-29-6

Mol F.

: C18H26O3

Mol W.

: C18H26O3

Cat No.

: SA16301

Impurities, Nandrolone

6ß-Hydroxynandrolone acetate

Please enquire for price & pack size

Out of Stock

CAS No.

: 13573-37-0

Mol F.

: C20H28O4

Mol W.

: C20H28O4

Cat No.

: SA16305

Beclomethasone Dipropionate, Impurities

6α-Bromo Beclomethasone Dipropionate

$495.00 25 mg

Out of Stock

CAS No.

: 887130-69-0

Mol F.

: C28H36BrClO7

Mol W.

: 599.94

Cat No.

: SA15609

Impurities, Prednisone

6α-Chloro Prednisone

Please enquire for price & pack size

Out of Stock

CAS No.

: 52080-57-6

Mol F.

: C21H25ClO5

Mol W.

: 392.87

Cat No.

: SA26205

Beclomethasone Dipropionate, Impurities

6α-Chlorobeclomethasone Dipropionate

$595.00 25 mg

Out of Stock

CAS No.

: 887130-68-9

Mol F.

: C28H36Cl2O7

Mol W.

: 555.49

Cat No.

: SA15613

Halcinonide, Impurities

6α-Hydroxy 11-keto Halcinonide

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H31ClO6

Mol W.

: 450.95

Cat No.

: SA30411

Halcinonide, Impurities

6α-Hydroxy Halcinonide

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H32ClFO6

Mol W.

: 470.96

Cat No.

: SA30405

Ethinylestradiol, Impurities

6α-Hydroxy-18-methyl Ethinylestradiol

Please enquire for price & pack size

Out of Stock

CAS No.

: 1175112-25-0

Mol F.

: C21H26O3

Mol W.

: 326.44

Cat No.

: SA13111

Estrone, Impurities

6α-Hydroxyestrone

Please enquire for price & pack size

Out of Stock

CAS No.

: 1476-78-4

Mol F.

: C18H22O3

Mol W.

: C18H22O3

Cat No.

: SA16005

Impurities, Nandrolone

6α-Hydroxynandrolone

Please enquire for price & pack size

Out of Stock

CAS No.

: 692731-75-2

Mol F.

: C18H26O3

Mol W.

: C18H26O3

Cat No.

: SA16302

Impurities, Prednisone

6α-Methyl Prednisone

Please enquire for price & pack size

Out of Stock

CAS No.

: 91523-05-6

Mol F.

: C22H28O5

Mol W.

: 372.45

Cat No.

: SA26213

Ethisterone, Impurities

6α-Methylandrost-4-ene-3,17-dione Cyclic 3-(Ethylene Acetal)

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C₂₂H₃₂O₃

Mol W.

: 344.49

Cat No.

: SA12906

Exemestane, Impurities

6α,17β-Dihydroxy-5α-androstan-3-one

Please enquire for price & pack size

Out of Stock

CAS No.

: 49644-02-2

Mol F.

: C19H30O3

Mol W.

: 306.44

Cat No.

: SA19135

Difluoroprednisolone, Impurities

6α,9-Difluoroprednisolone 21-Acetate 17-Butyrate

$80.00 25 mg

Out of Stock

CAS No.

: 23674-86-4

Mol F.

: C27H34F2O7

Mol W.

: 508.55

Cat No.

: SA14208

Flunisolide, Impurities

6β-Fluocinolone Acetonide

Please enquire for price & pack size

Out of Stock

CAS No.

: 1361531-95-4

Mol F.

: C24H30F2O6

Mol W.

: 452.49

Cat No.

: SA47506

Halcinonide, Impurities

6β-Hydroxy 11-keto Halcinonide

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H31ClO6

Mol W.

: 450.95

Cat No.

: SA30410

Budesonide, Impurities

6β-Hydroxy 21-Acetyloxy Budesonide

$395.00 25 mg

Out of Stock

CAS No.

: 93789-69-6

Mol F.

: C27H36O8

Mol W.

: 488.57

Cat No.

: SA14128

Halcinonide, Impurities

6β-Hydroxy Halcinonide

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H32ClFO6

Mol W.

: 470.96

Cat No.

: SA30404

Ethinylestradiol, Impurities

6β-Hydroxy-18-methyl Ethinylestradiol

Please enquire for price & pack size

Out of Stock

CAS No.

: 1175113-26-4

Mol F.

: C21H26O3

Mol W.

: 326.44

Cat No.

: SA13112

Estrone, Impurities

6β-Hydroxyestrone

Please enquire for price & pack size

Out of Stock

CAS No.

: 1229-25-0

Mol F.

: C18H22O3

Mol W.

: 286.37

Cat No.

: SA16006

Impurities, Prednisone

6β-Hydroxyprednisone

Please enquire for price & pack size

Out of Stock

CAS No.

: 95283-34-4

Mol F.

: C21H26O6

Mol W.

: 374.43

Cat No.

: SA26212

Impurities, Methylprednisolone

6β-Methylprednisolone 21-acetate

Please enquire for price & pack size

Out of Stock

CAS No.

: 1048031-82-8

Mol F.

: C24H32O6

Mol W.

: 416.51

Cat No.

: SA14422

Guanine, Impurities

7-(2-Chloroethyl)guanine

Please enquire for price & pack size

Out of Stock

CAS No.

: 22247-87-6

Mol F.

: C₇H₈ClN₅O

Mol W.

: 213.62

Cat No.

: SA32106

Brexpiprazole, Impurities

7-(4-(7-(4-chlorobutoxy)quinolin-2-yloxy)butoxy)quinolin-2(1H)-one

Please enquire for price & pack size

Out of Stock

CAS No.

: 2059942-13-9

Mol F.

: C26H27ClN2O4

Mol W.

: 466.95

Cat No.

: SA41313

Brexpiprazole, Impurities

7-(4-chloro butoxy)-1H-quinolin-2-one

Please enquire for price & pack size

Out of Stock

CAS No.

: 913613-82-8

Mol F.

: C13H14ClNO2

Mol W.

: 251.71

Cat No.

: SA41320

Impurities, Raloxifene

7-[4-(2-Piperidinyl)ethoxy]benzoyl Raloxifene

Please enquire for price & pack size

Out of Stock

CAS No.

: 1159977-58-8

Mol F.

: C42H44N2O6S

Mol W.

: 704.87

Cat No.

: SA24913

Brexpiprazole, Impurities

7-[4-[7-(4-Bromobutoxy) quinolin-2-yl]oxybutoxy]-4aH-quinolin-2-one

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C26H27BrN2O4

Mol W.

: 511.42

Cat No.

: SA41339

Cefadroxil, Impurities

7-Amino-3-vinyl-3-cephem-4-carboxylic acid (7-AVCA)

Please enquire for price & pack size

Out of Stock

CAS No.

: 79349-82-9

Mol F.

: C9H10N2O3S

Mol W.

: 226.25

Cat No.

: SA42308

Cefprozil, Impurities

7-Aminocephalosporanic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 957-68-6

Mol F.

: C₁₀H₁₂N₂O₅S

Mol W.

: 272.28

Cat No.

: SA31915

Allopurinol, Impurities

7-Aminopyrazolo[1,5-a]pyrimidine-3,6-dicarboxylic Acid 3,6-Diethyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

: 43024-67-5

Mol F.

: C₁₂H₁₄N₄O₄

Mol W.

: 278.26

Cat No.

: SA28910