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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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Impurities, Tamoxifen

β-Hydroxy Tamoxifen

Please enquire for price & pack size

Out of Stock

CAS No.

: 97151-03-6

Mol F.

: C26H29NO2

Mol W.

: 387.51

Cat No.

: SA35513

Cephalexin, Impurities

Δ-2-7-Aminodesacetoxycephalosporanic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 56487-68-4

Mol F.

: C8H10N2O3S

Mol W.

: 214.24

Cat No.

: SA12011

Ethinylestradiol, Impurities

Δ-6(7)-18-Methyl Ethinylestradiol

Please enquire for price & pack size

Out of Stock

CAS No.

: 1175128-91-2

Mol F.

: C21H24O2

Mol W.

: 308.42

Cat No.

: SA13113

Estradiol Valerate, Impurities

δ-6(7)-Dehydroestradiol divalerate

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Out of Stock

CAS No.

Mol F.

: C28H38O4

Mol W.

: 438.6

Cat No.

: SA14011

Estrone, Impurities

δ-6(7)-Estrone

Please enquire for price & pack size

Out of Stock

CAS No.

: 2208-12-0

Mol F.

: C18H20O2

Mol W.

: 268.35

Cat No.

: SA16012

Impurities, Nandrolone

δ-6(7)-Nandrolone

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Out of Stock

CAS No.

: 14531-84-1

Mol F.

: C18H24O2

Mol W.

: 272.38

Cat No.

: SA16304

Estrone, Impurities

δ-8(9)-Dehydroestrone

Please enquire for price & pack size

Out of Stock

CAS No.

: 474-87-3

Mol F.

: C18H20O2

Mol W.

: 268.3

Cat No.

: SA16003

Estrone, Impurities

δ-8(9)-Dehydroestrone Sodium Sulfate

Please enquire for price & pack size

Out of Stock

CAS No.

: 61612-83-7

Mol F.

: C18H19NaO5S

Mol W.

: 370.4

Cat No.

: SA16001

Estrone, Impurities

δ-9(11)-18-Methyl estrone

Please enquire for price & pack size

Out of Stock

CAS No.

: 19882-81-6

Mol F.

: C19H22O2

Mol W.

: C19H22O2

Cat No.

: SA16008

Estradiol Valerate, Impurities

δ-9(11)-Dehydroestradiol-3,17b-divalerate

Please enquire for price & pack size

Out of Stock

CAS No.

: 1373116-15-4

Mol F.

: C28H38O4

Mol W.

: 438.6

Cat No.

: SA14014

Estrone, Impurities

δ-9(11)-Dehydroestrone

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Out of Stock

CAS No.

: 1089-80-1

Mol F.

: C18H20O2

Mol W.

: 268.4

Cat No.

: SA16004

Estrone, Impurities

δ-9(11)-Estrone sulfate piperazine salt

Please enquire for price & pack size

Out of Stock

CAS No.

: 1313382-30-7

Mol F.

: C22H30N2O5S

Mol W.

: C22H30N2O5S

Cat No.

: SA16002

Fluorometholone, Impurities

Δ-9(11)-Fluorometholone

Please enquire for price & pack size

Out of Stock

CAS No.

: 34184-82-2

Mol F.

: C₂₁H₂₈O₃

Mol W.

: 328.44

Cat No.

: SA38408

Fluorometholone, Impurities

Δ-9(11)-Fluorometholone Acetate

Please enquire for price & pack size

Out of Stock

CAS No.

: 130145-14-1

Mol F.

: C₂₄H₃₀O₄

Mol W.

: 382.49

Cat No.

: SA38409

Impurities, Progesterone

Δ8,9-Progeterone

Please enquire for price & pack size

Out of Stock

CAS No.

: 83603-61-6

Mol F.

: C21H28O2

Mol W.

: 312.44

Cat No.

: SA18020

Eplerenone, Impurities

Δ9-Canrenone

Please enquire for price & pack size

Out of Stock

CAS No.

: 95716-71-5

Mol F.

: C22H26O3

Mol W.

: 338.44

Cat No.

: SA41803

Atropine, Impurities

ψ-Tropine

Please enquire for price & pack size

Out of Stock

CAS No.

: 135-97-7

Mol F.

: C8H15NO

Mol W.

: 141.21

Cat No.

: SA47708

Impurities, Sacubitril

Desethyl Sacubitril Isopropyl Succinate Impurity | CAS : 2459446-51-4

Please enquire for price & pack size

Out of Stock

CAS No.

: 2459446-51-4

Mol F.

: C25H31NO5

Mol W.

: 425.52

Cat No.

: SA40915

Impurities, Sacubitril

Dessuccinyl N-Boc Sacubitril Impurity | CAS : 149709-60-4

Please enquire for price & pack size

Out of Stock

CAS No.

: 149709-60-4

Mol F.

: C25H33NO4

Mol W.

: 411.53

Cat No.

: SA40913

Impurities, Sacubitril

Dessuccinyl Sacubitril Acid Impurity | CAS : 1038924-71-8

Please enquire for price & pack size

Out of Stock

CAS No.

: 1038924-71-8

Mol F.

: C18H22ClNO2

Mol W.

: 319.83

Cat No.

: SA40914

Impurities, Ritlecitinib

N-((3R)-1-benzyl-6-methylpiperidin-3-yl)-7-tosyl-7H-pyrrolo[2,3-d]pyrimidin-4-amine

Please enquire for price & pack size

Not Available

CAS No.

Mol F.

: C26H29N5O2S

Mol W.

: 475.61

Cat No.

: SA50009

Impurities, Risdiplam

N-Boc Risdiplam | CAS : 2133298-74-3

Please enquire for price & pack size

Out of Stock

CAS No.

: 2133298-74-3

Mol F.

: C27H31N7O3

Mol W.

: 501.58

Cat No.

: SA52310

Impurities, Risdiplam

N-Formyl Risdiplam Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C23H23N7O2

Mol W.

: 429.5

Cat No.

: SA52307

Impurities, Risdiplam

N-Hydroxy Risdiplam Impurity | CAS : 2250441-24-6

Please enquire for price & pack size

Out of Stock

CAS No.

: 2250441-24-6

Mol F.

: C22H23N7O2

Mol W.

: 417.46

Cat No.

: SA52309

Impurities, Risdiplam

N-Nitroso Risdiplam Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C22H22N8O2

Mol W.

: 430.46

Cat No.

: SA52312

Impurities, Vortioxetine

N-Nitroso Vortioxetine Sulfoxide

Please enquire for price & pack size

Not Available

CAS No.

Mol F.

: C18H21N3O2S

Mol W.

: 343.44

Cat No.

: SA50302

Impurities, Risdiplam

Risdiplam 3-ethylpiperazinyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C22H25N7O

Mol W.

: 403.48

Cat No.

: SA52313

Impurities, Risdiplam

Risdiplam 7-hydroxy Pyridopyrimidinone Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C16H13N5O2

Mol W.

: 307.31

Cat No.

: SA52308

Impurities, Risdiplam

Risdiplam 7-methoxy Pyridopyrimidinone Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C17H15N5O2

Mol W.

: 321.33

Cat No.

: SA52311

Impurities, Risdiplam

Risdiplam Imidazopyridazine Dimer Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C16H16N6

Mol W.

: 292.34

Cat No.

: SA52314

Impurities, Sacubitril

Sacubitril Acetyl impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C22H27NO3

Mol W.

: 353.46

Cat No.

: SA40908

Impurities, Sacubitril

Sacubitril Isopropyl Succinate Impurity | CAS : 2459446-53-6

Please enquire for price & pack size

Out of Stock

CAS No.

: 2459446-53-6

Mol F.

: C27H35NO5

Mol W.

: 453.57

Cat No.

: SA40916