Recently Viewed 0
Meet Clearsynth at CPHI India 2026 · November 23–25 · Booth 2J10 · IICC, Yashobhoomi, New Delhi View event
My Account Need quick assistance? WhatsApp us +91-22-45045900 sales@clearsynth.com
Categories / Impurity

Impurity Products

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

Showing 9721-9744 of 27565 products
All In Stock Custom Synthesis
4-[[5-cyclopentyloxycarbonylamino-2-[(3-methoxy benzoic acid-4-yl)-methyl]-1-methyl indol-3-yl]-methyl]-3-methoxy-benzoic acid chemical structure
Custom Synthesis

4-[[5-cyclopentyloxycarbonylamino-2-[(3-methoxy benzoic acid-4-yl)-methyl]-1-methyl indol-3-yl]-methyl]-3-methoxy-benzoic acid

CAT No. CS-O-44301
CAS No. -
Category Impurity
Parent API Zafirlukast
Formula C33H34N2O8
Mol. Wt. 586.63
4-[2-(2-Fluorophenyl)ethyl]piperidine chemical structure
Custom Synthesis

4-[2-(2-Fluorophenyl)ethyl]piperidine

CAT No. CS-M-17253
CAS No. 614731-85-0
Category Impurity
Parent API
Formula -
Mol. Wt.
4-[2-(3-Fluorophenyl)ethyl]piperidine chemical structure
Custom Synthesis

4-[2-(3-Fluorophenyl)ethyl]piperidine

CAT No. CS-M-25663
CAS No. 148492-14-2
Category Impurity
Parent API
Formula -
Mol. Wt.
4-[4-({[(5R)-2-(5-chloro-2-thienyl)-4,5-dihydro-1,3-oxazol-5-yl]methyl}amino)phenyl]morpholin-3-one chemical structure
Custom Synthesis

4-[4-({[(5R)-2-(5-chloro-2-thienyl)-4,5-dihydro-1,3-oxazol-5-yl]methyl}amino)phenyl]morpholin-3-one

CAT No. CS-O-36042
CAS No. -
Category Impurity
Parent API
Formula -
Mol. Wt. 391.87
4-[4-[(5R)-5-(Hydroxymethyl)-2-oxo-3-oxazolidinyl]phenyl]-3-morpholinone chemical structure
Custom Synthesis

4-[4-[(5R)-5-(Hydroxymethyl)-2-oxo-3-oxazolidinyl]phenyl]-3-morpholinone

CAT No. CS-O-43708
CAS No. 1117893-60-3
Category Impurity
Parent API
Formula -
Mol. Wt.
4-[4-[[(2S)-3-Amino-2-hydroxypropyl]amino]phenyl]-3-morpholinone chemical structure
Custom Synthesis

4-[4-[[(2S)-3-Amino-2-hydroxypropyl]amino]phenyl]-3-morpholinone

CAT No. CS-O-16689
CAS No. -
Category Impurity
Parent API
Formula -
Mol. Wt.
4-[4-Bromo-3-[(methoxymethoxy)methyl]phenoxy]benzonitrile chemical structure
Custom Synthesis

4-[4-Bromo-3-[(methoxymethoxy)methyl]phenoxy]benzonitrile

CAT No. CS-O-44405
CAS No. 947162-14-3
Category Impurity
Parent API Crisaborole
Formula C16H14BrNO3
Mol. Wt. 348.19
4-[bis-(5-amino-1-methyl indol-3-yl)methyl]-3-methoxy benzoic acid methyl ester chemical structure
Custom Synthesis

4-[bis-(5-amino-1-methyl indol-3-yl)methyl]-3-methoxy benzoic acid methyl ester

CAT No. CS-O-44326
CAS No. -
Category Impurity
Parent API Zafirlukast
Formula C28H28N4O3
Mol. Wt. 468.55
4-[Bis-(5-cyclopentyloxy carbonyl amino-1-methyl indol-3-yl)-methyl]-3-methoxy-benzoic acid chemical structure
Custom Synthesis

4-[Bis-(5-cyclopentyloxy carbonyl amino-1-methyl indol-3-yl)-methyl]-3-methoxy-benzoic acid

CAT No. CS-O-44300
CAS No. -
Category Impurity
Parent API Zafirlukast
Formula C39H42N4O7
Mol. Wt. 678.77
4-[Bis-(5-cyclopentyloxy carbonyl amino-1-methyl indol-3-yl)-methyl]-3-methoxy-benzoic acid methyl ester chemical structure
Custom Synthesis

4-[Bis-(5-cyclopentyloxy carbonyl amino-1-methyl indol-3-yl)-methyl]-3-methoxy-benzoic acid methyl ester

CAT No. CS-O-44293
CAS No. -
Category Impurity
Parent API Zafirlukast
Formula C40H44N4O7
Mol. Wt. 692.8
4-{[(Cyclopropylmethyl)sulfonyl]methyl}piperidine hydrochloride chemical structure
Custom Synthesis

4-{[(Cyclopropylmethyl)sulfonyl]methyl}piperidine hydrochloride

CAT No. CS-M-29164
CAS No. 1185295-04-8
Category Impurity
Parent API
Formula -
Mol. Wt.
4-{[cis-2,6-dimethylmorpholin-4-yl]methyl}benzoic acid chemical structure
Custom Synthesis

4-{[cis-2,6-dimethylmorpholin-4-yl]methyl}benzoic acid

CAT No. CS-EL-04124
CAS No. 1335220-62-6
Category Impurity
Parent API
Formula -
Mol. Wt.
4-{3-[4-(Methylsulfonyl)phenyl]-1,2,4-oxadiazol-5-yl}piperidine chemical structure
Custom Synthesis

4-{3-[4-(Methylsulfonyl)phenyl]-1,2,4-oxadiazol-5-yl}piperidine

CAT No. CS-M-03503
CAS No. 849925-03-7
Category Impurity
Parent API
Formula -
Mol. Wt.
4’-(azidobromomethyl)-[1,1’-biphenyl]-2-carboxylic acid chemical structure
Custom Synthesis

4’-(azidobromomethyl)-[1,1’-biphenyl]-2-carboxylic acid

CAT No. CS-O-41168
CAS No. -
Category Impurity
Parent API Olmesartan
Formula C14H10BrN3O2
Mol. Wt. 332.16
4’-Desethyl drotaverine HCl chemical structure
Custom Synthesis

4’-Desethyl drotaverine HCl

CAT No. CS-O-48351
CAS No. 75500-95-7(Free Base)
Category Impurity
Parent API -
Formula C22H28ClNO4
Mol. Wt. 405.92
4’-epi-Daunorubicin Hydrochloride chemical structure
Custom Synthesis

4’-epi-Daunorubicin Hydrochloride

CAT No. CS-T-51615
CAS No. 56390-08-0
Category Impurity
Parent API Daunorubicin
Formula -
Mol. Wt.
4′-Hydroxybupivacaine chemical structure
Custom Synthesis

4′-Hydroxybupivacaine

CAT No. CS-O-58439
CAS No. 51989-47-0
Category Impurity
Parent API Bupivacaine
Formula C18H28N2O2
Mol. Wt. 304.43
44-Ene-Rapamycin chemical structure
Custom Synthesis

44-Ene-Rapamycin

CAT No. CS-O-40874
CAS No. -
Category Impurity
Parent API Rapamycin
Formula C51H77NO12
Mol. Wt. 896.2
4a/ß-Hydroxy-2’H-5a-androst-2-eno[3,2-c]pyrazol-17-one chemical structure
Custom Synthesis

4a/ß-Hydroxy-2’H-5a-androst-2-eno[3,2-c]pyrazol-17-one

CAT No. CS-B-00359
CAS No. -
Category Impurity
Parent API
Formula C20H28N2O2
Mol. Wt. 328.45
4-Acetamido-2,2,6,6-tetramethylpiperidine chemical structure
Custom Synthesis

4-Acetamido-2,2,6,6-tetramethylpiperidine

CAT No. CS-T-00249
CAS No. 40908-37-0
Category Impurity
Parent API
Formula -
Mol. Wt.
4-acetamido-3-bromo-2-hydroxybenzoic acid chemical structure
Custom Synthesis

4-acetamido-3-bromo-2-hydroxybenzoic acid

CAT No. CS-O-55162
CAS No.
Category Impurity
Parent API Prucalopride
Formula C9H8BrNO4
Mol. Wt. 274.07
4-acetamido-3-bromo-5-chloro-2-hydroxybenzoic acid chemical structure
Custom Synthesis

4-acetamido-3-bromo-5-chloro-2-hydroxybenzoic acid

CAT No. CS-O-54014
CAS No.
Category Impurity
Parent API Prucalopride
Formula C9H7BrClNO4
Mol. Wt. 308.51
4-acetamido-3-methylbenzenesulfonic acid, sodium salt chemical structure
Custom Synthesis

4-acetamido-3-methylbenzenesulfonic acid, sodium salt

CAT No. CS-O-45635
CAS No. 102568-34-3
Category Impurity
Parent API Dasatinib
Formula C9H11NNaO4S
Mol. Wt.
4-acetoxy DMT hydrochloride chemical structure
Custom Synthesis

4-acetoxy DMT hydrochloride

CAT No. CS-O-51920
CAS No. 2748484-99-1
Category Impurity
Parent API Apilacetin
Formula C14H19ClN2O2
Mol. Wt. 282.77

Impurity Products at Clearsynth

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

Browse available compounds above or contact our team for custom synthesis and bulk requirements.

Done
RFQ Basket 0
Quick Enquiry
Tell us what you need
Quote Basket
Selected RFQ Items
Your RFQ basket is empty. Add a product block or copy a guided requirement here.