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Efinaconazole, Impurities

4-Hydroxymethyl-1-benzoyl Piperidine

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CAS No.

: 19980-00-8

Mol F.

: C13H17NO2

Mol W.

: 219.58

Cat No.

: SA23613

Impurities, Rilpivirine

4-Iodo-2,6-bis(methoxymethyl)aniline

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CAS No.

: NA

Mol F.

: C10H14INO2

Mol W.

: 307.13

Cat No.

: SA25405

Lornoxicam

4-Methoxy Lornoxicam

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CAS No.

: 2469039-23-2

Mol F.

: C14H12ClN3O4S2

Mol W.

: 385.8

Cat No.

: SA70401

Meloxicam

4-Methoxy Meloxicam

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CAS No.

: 1391051-96-9

Mol F.

: C15H15N3O4S2

Mol W.

: 365.4

Cat No.

: SA71509

Melatonin

4-Methoxy Tryptamine

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CAS No.

: 3610-35-3

Mol F.

: C11H14N2O

Mol W.

: 190.2

Cat No.

: SA71406

Impurities, Omeprazole

4-Methoxy-2-nitroaniline

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CAS No.

: 96-96-8

Mol F.

: C7H8N2O3

Mol W.

: 168.15

Cat No.

: SA19401

Intermediates

4-Methoxybutanoic acid

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CAS No.

: 29006-02-8

Mol F.

: C5H10O3

Mol W.

: 118.13

Cat No.

: SRC900089

Impurities, Ranolazine

4-Methoxyphenol

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CAS No.

: 150-76-5

Mol F.

: C7H8O2

Mol W.

: 124.14

Cat No.

: SA26810

Apixaban, Impurities

4-Methoxyphenylhydrazine Hydrochloride

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CAS No.

: 19501-58-7

Mol F.

: C7H10N2O·HCl

Mol W.

: 174.63

Cat No.

: SA39927

Impurities, Tapinarof

4-Methyl Tapinarof

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CAS No.

: 2657659-60-2

Mol F.

: C18H20O2

Mol W.

: 268.35

Cat No.

: SA51608

Apixaban, Impurities

4-Methyl-5-chlorovaleroyl Chloride

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CAS No.

: 813452-05-0

Mol F.

: C6H10Cl2O

Mol W.

: 169.05

Cat No.

: SA39956

Estradiol

4-Methylestradiol Cypionate

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CAS No.

: NA

Mol F.

: C27H38O3

Mol W.

: 410.59

Cat No.

: SA13216

Impurities, Pazopanib

4-Methyloxidoamino Pazopanib

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CAS No.

: 1821666-73-2

Mol F.

: C21H23N7O3S

Mol W.

: 453.5

Cat No.

: SA51316

Impurities, Lenalidomide

4-Nitro Lenalidomide Impurity

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CAS No.

: 827026-45-9

Mol F.

: C13H11N3O5

Mol W.

: 289.24

Cat No.

: SA34105

Impurities, Sulfamethoxazole

4-Nitro Sulfamethoxazole

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CAS No.

: 29699-89-6

Mol F.

: C10H9N3O5S

Mol W.

: 283.26

Cat No.

: SA25508

Building Blocks

4-Nitrobenzoyl Chloride

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CAS No.

: 122-04-3

Mol F.

: C7H4ClNO3

Mol W.

: 185.56

Cat No.

: SB10758

Impurities, Sulfamethoxazole

4-Nitroso Sulfamethoxazole

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CAS No.

: 131549-85-4

Mol F.

: C10H9N3O4S

Mol W.

: 267.26

Cat No.

: SA25507

Ezetimibe, Impurities

4-O-Methylphenyl Ezetimibe Ketone

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CAS No.

: 190595-65-4

Mol F.

: C31H25F2NO3

Mol W.

: 497.53

Cat No.

: SA14848

Dolutegravir, Impurities

4-Oxo-3-[(phenylmethyl)oxy]-4H-pyran-2-carboxylic Acid

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CAS No.

: 119736-16-2

Mol F.

: C13H10O5

Mol W.

: 246.22

Cat No.

: SA20225

Dolutegravir, Impurities

4-Oxo-4H-pyran-2,5-dicarboxylic Acid 2,5-Diethyl Ester

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CAS No.

: 1246616-74-9

Mol F.

: C11H12O6

Mol W.

: 240.21

Cat No.

: SA20226

Brinzolamide, Impurities

4-Oxobrinzolamide Derivative

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CAS No.

: 154127-41-0

Mol F.

: C10H14N2O6S3

Mol W.

: 354.4

Cat No.

: SA47208

Apixaban, Impurities

4-Pentenoyl chloride

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CAS No.

: 39716-58-0

Mol F.

: C5H7ClO

Mol W.

: 118.56

Cat No.

: SA39957

Fenticonazole

4-Phenyl Thio Benzyl Chloride

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CAS No.

: 1208-87-3

Mol F.

: C13H11ClS

Mol W.

: 234.7

Cat No.

: SA63206

Bosentan, Impurities

4-tert-Butylbenzenesulfonamide

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CAS No.

: 6292-59-7

Mol F.

: C10H15NO2S

Mol W.

: 213.3

Cat No.

: SA28604

Gemcitabine, Impurities

4,4-Difluoro-2-(hydroxymethyl)-5-oxotetrahydrofuran-3-yl benzoate

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CAS No.

: NA

Mol F.

: C12H10F2O5

Mol W.

: 272.2

Cat No.

: SA44510

Epinephrine, Impurities

4,4′-(Piperazine-2,5-diyl)dibenzene-1,2-diol

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CAS No.

Mol F.

: C16H18N2O4

Mol W.

: 302.33

Cat No.

: SA46500

Impurities, Sulfamethoxazole

4,4’-Azoxybis[N-(5-methyl-3-isoxazolyl)-benzenesulfonamide

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CAS No.

: 119403-03-1

Mol F.

: C20H18N6O7S2

Mol W.

: 518.52

Cat No.

: SA25509

Dapsone, Impurities

4,4’-Dichlorodiphenyl Sulfone

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CAS No.

: 80-07-9

Mol F.

: C12H8Cl2O2S2

Mol W.

: 287.16

Cat No.

: SA27012

Hydroxychloroquine, Impurities

4,5-Dichloroquinoline

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CAS No.

: 21617-18-5

Mol F.

: C9H5Cl2N

Mol W.

: 198.05

Cat No.

: SA23808

Impurities, Prednisone

4,5-Dihydro Prednisone

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CAS No.

: 103881-93-2

Mol F.

: C21H28O5

Mol W.

: 360.44

Cat No.

: SA26210

Intermediates

4,5-Dimethyl-1,3-dioxol-2-one

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CAS No.

: 37830-90-3

Mol F.

: C5H6O3

Mol W.

: 114.1

Cat No.

: SRC900036

Topiramate

4,5-O-(1-Methylethylidene)-β-D-fructopyranose

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CAS No.

: 912456-61-2

Mol F.

: C9H16O6

Mol W.

: 220.22

Cat No.

: SA45513

Impurities, Vericiguat

4,6-Diamino-2-(5-fluoro-1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridin-3-yl)-5-((methoxycarbonyl)amino)pyrimidine 1-oxide

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CAS No.

Mol F.

: C19H16F2N8O3

Mol W.

: 442.4

Cat No.

: SA50705

Fluorouracil

4,6-Dichloro-2-hydroxypyrimidine

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CAS No.

: 6297-80-9

Mol F.

: C4H2Cl2N2O

Mol W.

: 165.0

Cat No.

: SA66708

Fluorouracil

4,6-Dihydroxy-5-Methoxypyrimidine

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CAS No.

: 5193-84-0

Mol F.

: C5H6N2O3

Mol W.

: 142.1

Cat No.

: SA66709

Allopurinol, Impurities

4,6-Dihydroxypyrazolo[3,4-d]pyrimidine

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CAS No.

: 2465-59-0

Mol F.

: C5H4N4O2

Mol W.

: 152.11

Cat No.

: SA28912

Allopurinol, Impurities

4,6-Dimethoxy-1H-pyrazolo[3,4-d]pyrimidine

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CAS No.

: 98277-30-6

Mol F.

: C7H8N4O2

Mol W.

: 180.16

Cat No.

: SA28914

Building Blocks

4,6-Dimethylpyrimidin-2(1H)-one

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CAS No.

: 108-79-2

Mol F.

: C6H8N2O

Mol W.

: 124.1

Cat No.

: SB10725

Building Blocks

4,6-dimethylpyrimidine-2(1H)-thione

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CAS No.

: 64942-98-9

Mol F.

: C6H8N2S

Mol W.

: 140.21

Cat No.

: SB10726

Hydroxychloroquine, Impurities

4,7-Dichloroquine

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CAS No.

: 58175-86-3

Mol F.

: C18H26ClN3

Mol W.

: 319.87

Cat No.

: SA23803

Impurities, Pregabalin

4,9-Diisobutyl-1,6-diazecane-2,7-dione

$395.00 25 mg

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CAS No.

: 1990538-03-8

Mol F.

: C16H30N2O2

Mol W.

: 282.42

Cat No.

: SA24832

Intermediates

4’-[(2-Butyl-4-oxo-1,3-diazaspiro[4.4]non-1-en-3-yl)methyl]-[1,1’-Biphenyl]-2-carbonitrile

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CAS No.

: 138401-24-8

Mol F.

: C25H27N3O

Mol W.

: 385.5

Cat No.

: SRC900047

Fenofibrate, Impurities

4’-Chloro-3-hydroxy-benzophenone

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CAS No.

: 62810-39-3

Mol F.

: C13H9ClO2

Mol W.

: 232.66

Cat No.

: SA27210

Flurbiprofen, Impurities

4’-Hydroxy Flurbiprofen

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CAS No.

: 52807-12-2

Mol F.

: C15H13FO3

Mol W.

: 260.26

Cat No.

: SA14612

Impurities, Raloxifene

4’-tert-Butyldimethylsilyl-6-hydroxy Raloxifene

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CAS No.

: 174264-46-1

Mol F.

: C34H41NO4SSi

Mol W.

: 587.85

Cat No.

: SA24908

Building Blocks

5-((trimethylsilyl)ethynyl)pyridin-2-amine

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CAS No.

Mol F.

: C10H14N2Si

Mol W.

: 190.32

Cat No.

: SB10706

Impurities, Palbociclib

5-(1-Piperazinyl)-2-pyridinamine

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CAS No.

: 1082876-26-3

Mol F.

: C9H14N4

Mol W.

: 178.23

Cat No.

: SA40406

Building Blocks

5-(trifluoromethyl)-2-((trimethylsilyl)ethynyl)pyridine

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CAS No.

Mol F.

: C11H12F3NSi

Mol W.

: 243.07

Cat No.

: SB10705

Building Blocks

5-(trifluoromethyl)pyrimidin-2-amine

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CAS No.

: 69034-08-8

Mol F.

: C5H4F3N3

Mol W.

: 163.1

Cat No.

: SB10401

Impurities, Irbesartan

5-[1,1’-Biphenyl]-2-yl-2H-tetrazole

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CAS No.

: 147330-32-3

Mol F.

: C13H10N4

Mol W.

: 222.25

Cat No.

: SA23314

Product Categories

Products / Reference Standards / API Impurities / API Related Compounds / Pharmaceutical Standards

Please click on the respective API letter

Efinaconazole, Impurities

4-Hydroxymethyl-1-benzoyl Piperidine

CAS No.

: 19980-00-8

Mol F.

: C13H17NO2

Mol W.

: 219.58

Cat No.

: SA23613

Impurities, Rilpivirine

4-Iodo-2,6-bis(methoxymethyl)aniline

CAS No.

: NA

Mol F.

: C10H14INO2

Mol W.

: 307.13

Cat No.

: SA25405

Lornoxicam

4-Methoxy Lornoxicam

CAS No.

: 2469039-23-2

Mol F.

: C14H12ClN3O4S2

Mol W.

: 385.8

Cat No.

: SA70401

Meloxicam

4-Methoxy Meloxicam

CAS No.

: 1391051-96-9

Mol F.

: C15H15N3O4S2

Mol W.

: 365.4

Cat No.

: SA71509

Melatonin

4-Methoxy Tryptamine

CAS No.

: 3610-35-3

Mol F.

: C11H14N2O

Mol W.

: 190.2

Cat No.

: SA71406

Impurities, Omeprazole

4-​Methoxy-​2-​nitroaniline

CAS No.

: 96-96-8

Mol F.

: C7H8N2O3

Mol W.

: 168.15

Cat No.

: SA19401

Intermediates

4-Methoxybutanoic acid

CAS No.

: 29006-02-8

Mol F.

: C5H10O3

Mol W.

: 118.13

Cat No.

: SRC900089

Impurities, Ranolazine

4-Methoxyphenol

CAS No.

: 150-76-5

Mol F.

: C7H8O2

Mol W.

4-Methoxy-2-nitroaniline