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Categories / Impurity

Impurity Products

Browse available compounds, catalogue references, CAS numbers and technical details from Clearsynth.

Showing 433-456 of 27540 products
All In Stock Custom Synthesis
4-(Butylamino)benzoic Acid Ethyl Ester chemical structure
In Stock

4-(Butylamino)benzoic Acid Ethyl Ester

CAT No. CS-T-09361
CAS No. 94-32-6
Category Impurity
Parent API Benzonatate
Formula C13H19NO2
Mol. Wt. 221.3
4-(Dimethylamino)Butanoic Acid Hydrochloride chemical structure
In Stock

4-(Dimethylamino)Butanoic Acid Hydrochloride

CAT No. CS-M-25948
CAS No. 69954-66-1
Category Impurity
Parent API -
Formula C6H14ClNO2
Mol. Wt. 167.63
4-(Hydroxymethyl)benzoic Acid chemical structure
In Stock

4-(Hydroxymethyl)benzoic Acid

CAT No. CS-T-26778
CAS No. 3006-96-0
Category Impurity
Parent API Ecamsule
Formula C8H8O3
Mol. Wt. 152.1
4-(N,N-Dimethylamino)butanal Dimethyl Acetal chemical structure
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4-(N,N-Dimethylamino)butanal Dimethyl Acetal

CAT No. CS-T-53413
CAS No. 19718-92-4
Category Impurity
Parent API Sumatriptan
Formula C8H19NO2
Mol. Wt. 161.3
4-(Naphthalene-2-yl)phenylboronic acid pinacol ester chemical structure
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4-(Naphthalene-2-yl)phenylboronic acid pinacol ester

CAT No. CS-O-61060
CAS No. 1092390-02-7
Category Impurity
Parent API -
Formula C22H23BO2
Mol. Wt. 330.23
4-(Tert-butyl)-N-(6-ethoxy-5-(2-methoxyphenoxy)-[2,2'-bipyrimidin]-4-yl)benzenesulfonamide chemical structure
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4-(Tert-butyl)-N-(6-ethoxy-5-(2-methoxyphenoxy)-[2,2'-bipyrimidin]-4-yl)benzenesulfonamide

CAT No. CS-O-49005
CAS No. 157415-45-7
Category Impurity
Parent API Bosentan
Formula C27H29N5O5S
Mol. Wt. 535.61
4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,11-heptadecafluoroundecanoic acid chemical structure
In Stock

4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,11-heptadecafluoroundecanoic acid

CAT No. CS-T-79024
CAS No. 34598-33-9
Category Impurity
Parent API Decanoic Acid
Formula C11H5F17O2
Mol. Wt. 492.13
4,4-Dichlorodiphenyl Sulfone chemical structure
In Stock

4,4-Dichlorodiphenyl Sulfone

CAT No. CS-T-17510
CAS No. 80-07-9
Category Impurity
Parent API Dapsone
Formula C12H8Cl2O2S
Mol. Wt. 287.2
4,5-Dihydroxy-imidacloprid chemical structure
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4,5-Dihydroxy-imidacloprid

CAT No. CS-O-37847
CAS No. 1115248-03-7
Category Impurity
Parent API Imidacloprid
Formula C9H10ClN5O4
Mol. Wt. 287.66
4,6-Dichloro-2-(propylthio)pyrimidin-5-amine chemical structure
In Stock

4,6-Dichloro-2-(propylthio)pyrimidin-5-amine

CAT No. CS-O-31261
CAS No. 145783-15-9
Category Impurity
Parent API Ticagrelor
Formula C7H9Cl2N3S
Mol. Wt. 238.14
4,6-Dichloro-5-nitro-2-propylthiopyrimidine chemical structure
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4,6-Dichloro-5-nitro-2-propylthiopyrimidine

CAT No. CS-O-31840
CAS No. 145783-14-8
Category Impurity
Parent API Ticagrelor
Formula C7H7Cl2N3O2S
Mol. Wt. 268.12
4,6-Dimethyl-2-Methylsulfonyl-Pyrimidine chemical structure
In Stock

4,6-Dimethyl-2-Methylsulfonyl-Pyrimidine

CAT No. CS-M-20351
CAS No. 35144-22-0
Category Impurity
Parent API Ambrisentan
Formula C7H10N2O2S
Mol. Wt. 186.2
4-[(4-Methylpiperazin-1-yl)methyl]benzoic acid dihydrochloride chemical structure
In Stock

4-[(4-Methylpiperazin-1-yl)methyl]benzoic acid dihydrochloride

CAT No. CS-O-31820
CAS No. 106261-49-8
Category Impurity
Parent API Imatinib
Formula C13H20Cl2N2O2
Mol. Wt. 307.22
4-{5-[Bis-(2-hydroxy-ethyl)-amino]-1-methyl-1H-benzoimidazol-2-yl}-butyric acid ethyl ester chemical structure
In Stock

4-{5-[Bis-(2-hydroxy-ethyl)-amino]-1-methyl-1H-benzoimidazol-2-yl}-butyric acid ethyl ester

CAT No. CS-O-31946
CAS No. 3543-74-6
Category Impurity
Parent API Bendamustine
Formula C18H27N3O4
Mol. Wt. 349.42
4a,5-Epoxy Simvastatin chemical structure
In Stock

4a,5-Epoxy Simvastatin

CAT No. CS-TB-43540
CAS No. 149949-02-0
Category Impurity
Parent API Simvastatin
Formula C25H38O6
Mol. Wt. 434.57 g/mol
4-Acetamidocyclohexanol chemical structure
In Stock

4-Acetamidocyclohexanol

CAT No. CS-T-00221
CAS No. 23363-88-4
Category Impurity
Parent API Pramipexole
Formula C8H15NO2
Mol. Wt. 157.2
4-Amino salicylic acid / Mirtazapine EP impurity E chemical structure
In Stock

4-Amino salicylic acid / Mirtazapine EP impurity E

CAT No. CS-T-03461
CAS No. 65-49-6
Category Impurity
Parent API Mesalazine
Formula C7H7NO3
Mol. Wt. 153.14
4-amino-2-(1-(3-ethoxy-4-methoxyphenyl)-2-(methyl sulfonyl)ethyl)isoindoline-1,3-dione chemical structure
In Stock

4-amino-2-(1-(3-ethoxy-4-methoxyphenyl)-2-(methyl sulfonyl)ethyl)isoindoline-1,3-dione

CAT No. CS-O-34485
CAS No. 253168-83-1
Category Impurity
Parent API Apremilast
Formula C20H22N2O6S
Mol. Wt. 418.5
4-Amino-3,5-dibromobenzoic acid chemical structure
In Stock

4-Amino-3,5-dibromobenzoic acid

CAT No. CS-DV-02604
CAS No. 4123-72-2
Category Impurity
Parent API -
Formula C7H5Br2NO2
Mol. Wt. 294.93
4-Amino-3-chlorophenol hydrochloride chemical structure
In Stock

4-Amino-3-chlorophenol hydrochloride

CAT No. CS-DV-02605
CAS No. 52671-64-4
Category Impurity
Parent API -
Formula C6H7Cl2NO
Mol. Wt. 180.03
4-Amino-N-[2-(diethylamino)ethyl]benzamidehydrochloride chemical structure
In Stock

4-Amino-N-[2-(diethylamino)ethyl]benzamidehydrochloride

CAT No. CS-M-15739
CAS No. 614-39-1
Category Impurity
Parent API -
Formula C13H22ClN3O
Mol. Wt. 271.79
4-aminophenol chemical structure
In Stock

4-aminophenol

CAT No. CS-O-31123
CAS No. 123-30-8
Category Impurity
Parent API Paracetamol
Formula C6H7NO
Mol. Wt. 109.13
4-Bromoacetophenone chemical structure
In Stock

4-Bromoacetophenone

CAT No. CS-T-07863
CAS No. 99-90-1
Category Impurity
Parent API Acetophenone
Formula C8H7BrO
Mol. Wt. 199.04
4-Bromoestrone chemical structure
In Stock

4-Bromoestrone

CAT No. CS-T-08456
CAS No. 1630-82-6
Category Impurity
Parent API Estrone
Formula C18H21BrO2
Mol. Wt. 349.26

Impurity Products at Clearsynth

Browse available Impurity products from Clearsynth. These compounds support analytical research, quality control and pharmaceutical development.

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