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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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Emtricitabine, Impurities

2-Chloro-4-amino-5-fluoropyrimidine

Please enquire for price & pack size

Out of Stock

CAS No.

: 155-10-2

Mol F.

: C4H3ClFN3

Mol W.

: 147.54

Cat No.

: SA22922

Chlorpromazine, Impurities

2-Chloro-7-hydroxy Phenothiazine

$155.00 25 mg

Out of Stock

CAS No.

: 2002-32-6

Mol F.

: C12H8ClNOS

Mol W.

: 249.72

Cat No.

: SA21615

Diclofenac, Impurities

2-Chloro-N-(2,6-dichlorophenyl)-N-phenylacetamide

Please enquire for price & pack size

Out of Stock

CAS No.

: 15308-01-7

Mol F.

: C₁₄H₁₀Cl₃NO

Mol W.

: 314.59

Cat No.

: SA12709

Impurities, Ranolazine

2-chloro-N-(2,6-dimethylphenyl)acetamide

Please enquire for price & pack size

Out of Stock

CAS No.

: 1131-01-7

Mol F.

: C10H12ClNO

Mol W.

: 197.66

Cat No.

: SA26812

Clonixin, Impurities

2-Chloro-N-(3-chloro-2-methylphenyl)nicotinamide

Please enquire for price & pack size

Out of Stock

CAS No.

: 57841-61-9

Mol F.

: C13H11ClN2O2

Mol W.

: 262.69

Cat No.

: SA38002

Diphenhydramine, Impurities

2-Chloroethyl Benzhydryl Ether

Please enquire for price & pack size

Out of Stock

CAS No.

: 32669-06-0

Mol F.

: C15H15ClO

Mol W.

: 246.73

Cat No.

: SA19804

Fenofibrate, Impurities

2-Chlorophenyl Benzoate

Please enquire for price & pack size

Out of Stock

CAS No.

: 54683-91-9

Mol F.

: C13H9ClO2

Mol W.

: 232.66

Cat No.

: SA27211

Impurities, Leflunomide

2-Cyano-3-hydroxy-N-(4-methylphenyl)-2-butenamide

Please enquire for price & pack size

Out of Stock

CAS No.

: 1385789-70-7

Mol F.

: C12H12N2O2

Mol W.

: 216.24

Cat No.

: SA21811

Impurities, Leflunomide

2-Cyano-N-[3-methyl-4-(trifluoromethyl)phenyl]-acetamide

Please enquire for price & pack size

Out of Stock

CAS No.

: 179637-55-9

Mol F.

: C11H9F3N2O

Mol W.

: 242.2

Cat No.

: SA21812

Impurities, Penciclovir

2-Deamino-(2,3-dihydro-2-oxo) Penciclovir

$195.00 25 mg

Out of Stock

CAS No.

: 108970-74-7

Mol F.

: C10H14N4O4

Mol W.

: 254.24

Cat No.

: SA27710

Efavirenz, Impurities

2-Deoxo 2-(4-methoxyphenyl) Efavirenz

Please enquire for price & pack size

Out of Stock

CAS No.

: 209414-26-6

Mol F.

: C₂₁H₁₇ClF₃NO₂

Mol W.

: 407.81

Cat No.

: SA17612

Efavirenz, Impurities

2-Deoxo-3-desoxy Efavirenz

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C₁₅H₁₃ClF₃N

Mol W.

: 299.72

Cat No.

: SA17618

Gemcitabine, Impurities

2-Deoxy-2,2-difluoro-D-erythro-pentofuranos-1-ulose-3,5-dibenzoate

Please enquire for price & pack size

Out of Stock

CAS No.

: 122111-01-7

Mol F.

: C19H14F2O6

Mol W.

: 376.31

Cat No.

: SA44507

Decitabine, Impurities

2-Deoxy-D-erythro-pentopyranosyl Chloride Bis(4-methylbenzoate) (Mixture of ±/β isomers)

Please enquire for price & pack size

Out of Stock

CAS No.

: 20535-28-8

Mol F.

: C21H21ClO5

Mol W.

: 388.84

Cat No.

: SA42213

Apremilast, Impurities

2-Desacetyl Apremilast Open Chain Analog

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C20H24N2O7S

Mol W.

: 436.48

Cat No.

: SA30023

Dorzolamide, Impurities

2-Desaminosulfonyl 3-Aminosulfonyl Dorzolamide

$1,455.00 25 mg

Out of Stock

CAS No.

: 199734-71-9

Mol F.

: C10H16N2O4S3

Mol W.

: 324.44

Cat No.

: SA24110

Flurbiprofen, Impurities

2-desfluoro-2 amino Flurbiprofen

Please enquire for price & pack size

Out of Stock

CAS No.

: 52806-72-1

Mol F.

: C15H15NO2

Mol W.

: 241.29

Cat No.

: SA14616

Impurities, Neostigmine

2-dimethyl amino phenol

Please enquire for price & pack size

Out of Stock

CAS No.

: 3743-22-4

Mol F.

: C8H11NO

Mol W.

: 137.18

Cat No.

: SA19705

Impurities, Remdesivir

2-Ethylbutyl ((4-nitrophenoxy)(phenoxy)phosphoryl)-D-alaninate

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C21H27N2O7P

Mol W.

: 450.4

Cat No.

: SA42728

Impurities, Remdesivir

2-Ethylbutyl ((S)-(perfluorophenoxy)(phenoxy)phosphoryl)-L-alaninate

Please enquire for price & pack size

Out of Stock

CAS No.

: 1911578-98-7

Mol F.

: C21H23F5NO5P

Mol W.

: 495.4

Cat No.

: SA42730

Impurities, Remdesivir

2-Ethylbutyl (2S)-2-aminopropionate

Please enquire for price & pack size

Out of Stock

CAS No.

: 946565-74-8

Mol F.

: C9H19NO2

Mol W.

: 173.3

Cat No.

: SA42712

Impurities, Meclofenamic Acid

2-Fluorobenzoic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 445-29-4

Mol F.

: C₇H₅FO₂

Mol W.

: 140.11

Cat No.

: SA10604

Atorvastatin, Impurities

2-fluro diketoatorvastatin derivative

$500.00 250 mg

Out of Stock

CAS No.

: 1797905-42-0

Mol F.

: C26H24FNO3

Mol W.

: 417.47

Cat No.

: SA17803

Impurities, Mometasone

2-Furoic acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 88-14-2

Mol F.

: C5H4O3

Mol W.

: 112

Cat No.

: SA28725

Deferasirox, Impurities

2-HYDRAZINO BENZOIC ACID

Please enquire for price & pack size

Out of Stock

CAS No.

: 5326-27-2

Mol F.

: C7H8N2O2

Mol W.

: 152.151

Cat No.

: SA25114

Carbamazepine, Impurities

2-Hydroxy Carbamazepine

$495.00 25 mg

Out of Stock

CAS No.

: 68011-66-5

Mol F.

: C15H12N2O2

Mol W.

: 252.27

Cat No.

: SA20321

Cephalexin, Impurities

2-Hydroxy Cephalexin

Please enquire for price & pack size

Out of Stock

CAS No.

: 215172-75-1

Mol F.

: C16H17N3O5S

Mol W.

: 363.39

Cat No.

: SA12017

Doxepin, Impurities

2-Hydroxy Doxepin

Please enquire for price & pack size

Out of Stock

CAS No.

: 131523-90-5

Mol F.

: C19H21NO2

Mol W.

: 295.37

Cat No.

: SA29909

Ethinylestradiol, Impurities

2-Hydroxy Ethinylestradiol

Please enquire for price & pack size

Out of Stock

CAS No.

: 50394-89-3

Mol F.

: C20H24O3

Mol W.

: 312.4

Cat No.

: SA13109

Impurities, Tiotropium

2-Hydroxy-2-(thiophen-2-yl)-2-(thiophen-3-yl)acetic Acid Methyl Ester

$345.00 25 mg

Out of Stock

CAS No.

: 28748-67-6

Mol F.

: C11H10O3S2

Mol W.

: 254.33

Cat No.

: SA11717

Impurities, Tolterodine

2-Hydroxy-5-methyl-γ-phenylbenzenepropanol

Please enquire for price & pack size

Out of Stock

CAS No.

: 851789-43-0

Mol F.

: C16H18O2

Mol W.

: 242.31

Cat No.

: SA28213

Decitabine, Impurities

2-Hydroxymethyl-5-methoxy-tetrahydro-furan-3-ol

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C6H12O4

Mol W.

: 148.16

Cat No.

: SA42215

Ethisterone, Impurities

2-Hydroxymethylene Ethisterone

Please enquire for price & pack size

Out of Stock

CAS No.

: 2787-02-2

Mol F.

: C₂₂H₂₈O₃

Mol W.

: 340.46

Cat No.

: SA12904

Dutasteride, Impurities

2-Iodo 17-carboxylic acid Dutasteride

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C20H30INO3

Mol W.

: 459.36

Cat No.

: SA35214

Impurities, Zolpidem

2-Keto Zolpidem

Please enquire for price & pack size

Out of Stock

CAS No.

: 400038-68-8

Mol F.

: C19H19N3O2

Mol W.

: 321.37

Cat No.

: SA43002

Ethinylestradiol, Impurities

2-Methoxy-17α-Ethinylestradiol

Please enquire for price & pack size

Out of Stock

CAS No.

: 22415-44-7

Mol F.

: C21H26O3

Mol W.

: 326.43

Cat No.

: SA13127

Impurities, Ranolazine

2-Methoxyphenol

Please enquire for price & pack size

Out of Stock

CAS No.

: 90-05-1

Mol F.

: C7H8O2

Mol W.

: 124.14

Cat No.

: SA26811

Carbamazepine, Impurities

2-Methyl Carbamazepine

Please enquire for price & pack size

Out of Stock

CAS No.

: 70401-32-0

Mol F.

: C16H14N2O

Mol W.

: 250.3

Cat No.

: SA20327

Impurities, Pazopanib

2-Methyl-5-nitrobenzenesulfonamide

Please enquire for price & pack size

Out of Stock

CAS No.

: 6269-91-6

Mol F.

: C7H8N2O4S

Mol W.

: 216.21

Cat No.

: SA51317

Carbamazepine, Impurities

2-Methyl-5H-dibenzazepine

Please enquire for price & pack size

Out of Stock

CAS No.

: 70401-31-9

Mol F.

: C15H13N

Mol W.

: 207.27

Cat No.

: SA20344

Estrone, Impurities

2-Methylestrone

Please enquire for price & pack size

Out of Stock

CAS No.

: 2626-12-2

Mol F.

: C19H24O2

Mol W.

: 284.39

Cat No.

: SA16007

Amiodarone, Impurities

2-n-Butyl-4-[(2-bromoethoxy)-3,5-diiodobenzoyl]benzofuran

Please enquire for price & pack size

Out of Stock

CAS No.

: 96027-84-8

Mol F.

: C21H19BrI2O3

Mol W.

: 653.09

Cat No.

: SA26413

Impurities, Rilpivirine

2-Nitro-1,3-benzenedimethanol

Please enquire for price & pack size

Out of Stock

CAS No.

: 16578-60-2

Mol F.

: C8H9NO4

Mol W.

: 183.16

Cat No.

: SA25413

Impurities, Rilpivirine

2-Nitroisophthalic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 21161-11-5

Mol F.

: C8H5NO6

Mol W.

: 211.13

Cat No.

: SA25412

Fingolimod, Impurities

2-Phenethyl Fingolimod Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 851039-25-3

Mol F.

: C35H57NO2

Mol W.

: 523.83000000000004

Cat No.

: SA34502

Impurities, Naratriptan

2‐[3‐(1‐Methylpiperidin‐4‐yl)‐1H‐indol‐5‐yl]ethane‐sulfonic acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 2512213-55-5

Mol F.

: C20H32N4O4S2

Mol W.

: 456.63

Cat No.

: SA30810

Impurities, Tulobuterol

2,2-dibromo-1-(2-chlorophenyl)ethan-1-ol

Please enquire for price & pack size

Out of Stock

CAS No.

: 179749-59-8

Mol F.

: C8H7Br2ClO

Mol W.

: 314.39999999999998

Cat No.

: SA19605

Impurities, Tulobuterol

2,2-dibromo-1-(2-chlorophenyl)ethan-1-one

Please enquire for price & pack size

Out of Stock

CAS No.

: 34356-83-7

Mol F.

: C8H5Br2ClO

Mol W.

: 312.38

Cat No.

: SA19604

Gemcitabine, Impurities

2,2-Difluoro-3,4,5-trihydroxypentanoic acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 1824520-32-2

Mol F.

: C5H8F2O5

Mol W.

: 186.1

Cat No.

: SA44509

Gemcitabine, Impurities

2,2-Dimethyl-1,3-dioxolane-4-carboxaldehyde

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C6H10O3

Mol W.

: 130.13999999999999

Cat No.

: SA44502