Home / Products / Impurities

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.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Impurities, Ranolazine

2,2′-(4,4′-(2-hydroxypropane-1,3-diyl)bis(piperazine-4,1-diyl))bis(N-(2,6-dimethylphenyl)acetamide)

Please enquire for price & pack size

Out of Stock

CAS No.

: 1213269-66-9

Mol F.

: C31H46N6O3

Mol W.

: 550.73

Cat No.

: SA26815

Colesevelam, Impurities

2,2′-azobis(2-amidinopropane) dihydrochloride

$70.00 25 mg

Out of Stock

CAS No.

: 2997-92-4

Mol F.

: C8H20Cl2N6

Mol W.

: 271.19

Cat No.

: SA10208

Impurities, Rosuvastatin

2,3-Anhydro Rosuvastatin Calcium Salt

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C22H27FN3O5S.1/2Ca

Mol W.

: 484.5

Cat No.

: SA12132

Impurities, Rosuvastatin

2,3-Anhydro Rosuvastatin Methyl Ester

$350.00 25 mg

Out of Stock

CAS No.

: 2452383-22-9

Mol F.

: C23H28FN3O5S

Mol W.

: 477.55

Cat No.

: SA12128

Eslicarbazepine, Impurities

2,3-Bis(acetyloxy)butanedioic Acid Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 475674-43-2

Mol F.

: 475674-43-2

Mol W.

: 470.43

Cat No.

: SA28803

Impurities, Topiramate

2,3-Desisopropylidene Topiramate Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 851957-35-2

Mol F.

: C9H17NO8S

Mol W.

: 299.3

Cat No.

: SA45507

Impurities, Zopiclone

2,3-Dicarboxypyrazine (its chemical)

Please enquire for price & pack size

Out of Stock

CAS No.

: 89-01-0

Mol F.

: C†H„N‚O„

Mol W.

: 168.11

Cat No.

: SA38706

Fluorometholone, Impurities

2,3-Dichloropropan-1-ol

Please enquire for price & pack size

Out of Stock

CAS No.

: 616-23-9

Mol F.

: C3H6Cl2O

Mol W.

: 128.99

Cat No.

: SA38416

Impurities, Zopiclone

2,3-Pyrazinedicarboxylic Acid Anhydride

Please enquire for price & pack size

Out of Stock

CAS No.

: 4744-50-7

Mol F.

: C†H‚N‚Oƒ

Mol W.

: 150.09

Cat No.

: SA38704

Impurities, Rosuvastatin

2,3,4,5-Dianhydro Rosuvastatin Methyl Ester

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C23H26FN3O4S

Mol W.

: 459.53

Cat No.

: SA12140

Dapagliflozin, Impurities

2,3,4,6-Tetrakis-O-trimethylsilyl-D-gluconolactone

Please enquire for price & pack size

Out of Stock

CAS No.

: 32384-65-9

Mol F.

: C18H42O6Si4

Mol W.

: 466.88

Cat No.

: SA15018

Impurities, Remdesivir

2,3,5-Tri-O-benzyl-D-ribono-1,4-lactone

Please enquire for price & pack size

Out of Stock

CAS No.

: 55094-52-5

Mol F.

: C26H26O5

Mol W.

: 418.5

Cat No.

: SA42727

Impurities, Remdesivir

2,3,5-Tri-O-benzyl-D-ribose

Please enquire for price & pack size

Out of Stock

CAS No.

: 54623-25-5

Mol F.

: C26H28O5

Mol W.

: 420.5

Cat No.

: SA42732

Dapsone, Impurities

2,4-Diaminophenyl Sulfone

Please enquire for price & pack size

Out of Stock

CAS No.

: 116435-84-8

Mol F.

: C12H12N2O2S

Mol W.

: 248.3

Cat No.

: SA27016

Aciclovir, Impurities

2,4-Dichloro-1-nitrobenzene

Please enquire for price & pack size

Out of Stock

CAS No.

: 611-06-3

Mol F.

: C6H3Cl2NO2

Mol W.

: 192

Cat No.

: SA21403

Impurities, Pregabalin

2,4-Dicyano-3-(2-methylpropyl)-pentanediamide

Please enquire for price & pack size

Out of Stock

CAS No.

: 185815-56-9

Mol F.

: C11H16N4O2

Mol W.

: 236.27

Cat No.

: SA24830

Impurities, Pregabalin

2,4-Dicyano-3-isobutyl-glutaric Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 99068-93-6

Mol F.

: C10H12N2O4

Mol W.

: 224.21

Cat No.

: SA24829

Impurities, Rosuvastatin

2,4-Dideoxy-6-O-(phenylmethyl)-L-threo-hexonic Acid tert-Butyl Ester

$1,050.00 25 mg

Out of Stock

CAS No.

: 215876-09-8

Mol F.

: C17H26O5

Mol W.

: 310.39

Cat No.

: SA12160

Impurities, Neostigmine

2,4-Pyridinediamine

Please enquire for price & pack size

Out of Stock

CAS No.

: 461-88-1

Mol F.

: C5H7N3

Mol W.

: 109.13

Cat No.

: SA19709

Empagliflozin, Impurities

2,5-Anhydro-d-gluconic acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 490-94-8

Mol F.

: C6H10O6

Mol W.

: 178.14

Cat No.

: SA15142

Impurities, Ribociclib

2,5-Dibromo-N-cyclopentylpyrimidin-4-amine

Please enquire for price & pack size

Out of Stock

CAS No.

: 2481084-18-6

Mol F.

: C9H11Br2N3

Mol W.

: 321

Cat No.

: SA47112

Impurities, Ribociclib

2,5-Dichloro-N-cyclopentylpyrimidin-4-amine

Please enquire for price & pack size

Out of Stock

CAS No.

: 1214279-37-4

Mol F.

: C9H11Cl2N3

Mol W.

: 232.1

Cat No.

: SA47111

Impurities, Sapropterin

2,6-Diamino-4-hydroxy-5-nitrosopyrimidine

Please enquire for price & pack size

Out of Stock

CAS No.

: 2387-48-6

Mol F.

: C4H5N5O2

Mol W.

: 155.12

Cat No.

: SA45215

Impurities, Meclofenamic Acid

2,6-Dichloro-3-methylaniline

Please enquire for price & pack size

Out of Stock

CAS No.

: 64063-37-2

Mol F.

: C₇H₇Cl₂N

Mol W.

: 176.04

Cat No.

: SA10603

Impurities, Rilpivirine

2,6-Dihydroxymethyl Rilpivirine

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C22H18N6O2

Mol W.

: 398.42

Cat No.

: SA25402

Brexpiprazole, Impurities

2,7-Bis(4-bromobutoxy)quinoline

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C17H21B2NO2

Mol W.

: 431.16

Cat No.

: SA41340

Brexpiprazole, Impurities

2,7-Bis(4-chlorobutoxy)quinoline

Please enquire for price & pack size

Out of Stock

CAS No.

: 2060027-95-2

Mol F.

: C17H21Cl2NO2

Mol W.

: 342.3

Cat No.

: SA41334

Impurities, Molnupiravir

2′,3′-Isopropylideneuridine

Please enquire for price & pack size

Out of Stock

CAS No.

: 362-43-6

Mol F.

: C12H16N2O6

Mol W.

: 284.27

Cat No.

: SA46205

Impurities, Sofosbuvir

2’S-β-Fluoro tribenzoyl sofosbuvir intermidiate

$1,595.00 25 mg

Out of Stock

CAS No.

: 817204-32-3

Mol F.

: C31H26FN3O7

Mol W.

: 571.55

Cat No.

: SA15438

Impurities, Sofosbuvir

2′-Keto Sofosbuvir

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C21H26N3O10P

Mol W.

: 511.42

Cat No.

: SA15410

Impurities, Prednisone

20-Hydroxymethyl Prednisone (Mixture of Diastereomers)

Please enquire for price & pack size

Out of Stock

CAS No.

: 1620672-12-9

Mol F.

: C22H30O5

Mol W.

: 374.47

Cat No.

: SA26211

Impurities, Prednisone

21 Dehydro Prednisolone Impurity | CAS NO-22420-16-2

Please enquire for price & pack size

Out of Stock

CAS No.

: 22420-16-2

Mol F.

: C21H26O5

Mol W.

: 358.4

Cat No.

: SA26220

Impurities, Prednisone

21-(Acetyloxy)-pregna-1,4,16-triene-3,11,20-trione

Please enquire for price & pack size

Out of Stock

CAS No.

: 82423-35-6

Mol F.

: C23H26O5

Mol W.

: 382.45

Cat No.

: SA26217

Flunisolide, Impurities

21-Acetoxy-6α-fluoro-16α,17-(isopropylidenedioxy)pregna-1,4,9(11)-triene-3,20-dione

Please enquire for price & pack size

Out of Stock

CAS No.

: 5049-89-8

Mol F.

: C26H31FO6

Mol W.

: 458.52

Cat No.

: SA47509

Impurities, Mometasone

21-Acetyloxy Deschloromometasone Furoate

$275.00 25 mg

Out of Stock

CAS No.

: 83897-05-6

Mol F.

: C29H33ClO8

Mol W.

: 545.02

Cat No.

: SA28710

Impurities, Mometasone

21-Acetyloxy Deschloromometasone Furoate 9,11-Epoxide

$595.00 25 mg

Out of Stock

CAS No.

: 109183-56-4

Mol F.

: C29H32O8

Mol W.

: 508.56

Cat No.

: SA28711

Halcinonide, Impurities

21-Aldehyde Halcinonide

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H31FO6

Mol W.

: 434.5

Cat No.

: SA30413

Desonide, Impurities

21-Carboxy-20-hydroxy-Desonide

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C₂₄H₃₂O₇

Mol W.

: 432.51

Cat No.

: SA19005

Halcinonide, Impurities

21-Carboxylic acid Halcinonide

Please enquire for price & pack size

Out of Stock

CAS No.

: 80262-32-4

Mol F.

: C24H31FO7

Mol W.

: 450.5

Cat No.

: SA30414

Impurities, Testosterone

21-Chlorotestosterone Cypionate

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C27H39ClO3

Mol W.

: 447.06

Cat No.

: SA16221

Dexamethasone, Impurities

21-Dehydro 17-deoxy Dexamethasone

$395.00 25 mg

Out of Stock

CAS No.

: 1188271-71-7

Mol F.

: C22H27FO4

Mol W.

: 374.45

Cat No.

: SA15518

Desoximetasone, Impurities

21-Dehydro Desoxymetasone

Please enquire for price & pack size

Out of Stock

CAS No.

: 1188271-71-7

Mol F.

: C22H27FO4

Mol W.

: 374.45

Cat No.

: SA19203

Flunisolide, Impurities

21-Dehydro Flunisolide

Please enquire for price & pack size

Out of Stock

CAS No.

: 1188271-69-3

Mol F.

: C24H31FO7

Mol W.

: 450.5

Cat No.

: SA47510

Impurities, Prednisone

21-Dehydro Meprednisone

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C22H26O5

Mol W.

: 370.44

Cat No.

: SA26207

Impurities, Triamcinolone Acetonide

21-Dehydro Triamcinolone

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C₂₁H₂₅FO₆

Mol W.

: 392.42

Cat No.

: SA30208

Budesonide, Impurities

21-Dehydro-16α-hydroxy Prednisone

$295.00 25 mg

Out of Stock

CAS No.

Mol F.

: C21H26O6

Mol W.

: 374.43

Cat No.

: SA14105

Impurities, Prednisone

21-Dehydro-6α-chloro Prednisone

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C21H23ClO5

Mol W.

: 390.86

Cat No.

: SA26206

Impurities, Prednisone

21-Dehydro-6α-methyl Prednisone

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C22H26O5

Mol W.

: 370.44

Cat No.

: SA26208

Hydrocortisone, Impurities

21-Deoxy Cortisone

Please enquire for price & pack size

Out of Stock

CAS No.

: 1882-82-2

Mol F.

: C₂₁H₂₈O₄

Mol W.

: 344.44

Cat No.

: SA15214

Dexamethasone, Impurities

21-Hemiacetal Dexamethasone

$295.00 25 mg

Out of Stock

CAS No.

: 473273-03-9

Mol F.

: C23H31FO6

Mol W.

: 422.49

Cat No.

: SA15507