Impurities & Reference Standards
API Impurities
Source 1942 api impurities for research, QC and production, documented with COA and SDS.
14,098products
1,516in stock
COA + SDSwith every lot
4-(3-Formyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)benzonitrile
- CAS
- 2141947-89-7
- Formula
- C20H20BNO4
- MW
- 349.2 g/mol
VQ-029938
4-(3-Iodo-1-isopropyl-1H-pyrazol-4-yl)pyrimidin-2-amine
- CAS
- 1269440-54-1
- Formula
- C10H12IN5
- MW
- 329.14 g/mol
VQ-025538
4-(3-Isopropoxyphenyl)-1,3,4-trimethyl-1,2,3,4-tetrahydropyridine
- CAS
- 145340-45-0
- Formula
- C17H25NO
- MW
- 259.4 g/mol
VQ-029080
4-(3-Methoxypropoxy)-2,3-dimethylpyridin-1-ium-1-olate
- CAS
- 117977-18-1
- Formula
- C11H17NO3
- MW
- 211.26 g/mol
VQ-027715
4-(3,4-Dichlorophenyl)-N-methyl-1,2,3,4-tetrahydronaphthalen-2-amine
- CAS
- 944053-72-9
- Formula
- C17H17Cl2N
- MW
- 306.2 g/mol
VQ-044366
4-(4-(3-(4-Chloro-3-(trifluoromethyl)phenyl)ureido)-3-fluorophenoxy)picolinic Acid
- CAS
- 1187945-05-6
- Formula
- C20H12ClF4N3O4
- MW
- 469.8 g/mol
VQ-033484
4-(4-(3-(4-Chloro-3(trifluoromethyl)phenyl)ureido)phenox yl)-n-ethylpicolinamide
- CAS
- 284461-82-1
- Formula
- C22H18ClF3N4O3
- MW
- 478.8 g/mol
VQ-042236
4-(4-(3-Bromopropyl)piperazin-1-yl)-7-chloroquinoline
- CAS
- 1373484-78-6
- Formula
- C16H19BrClN3
- MW
- 368.7 g/mol
VQ-032651
4-(4-(3-Cyclopropylureido)phenoxy)-7-methoxyquinoline-6-carboxamide
- CAS
- 417714-14-8
- Formula
- C21H20N4O4
- MW
- 392.4 g/mol
VQ-048831
![4-(4-(Benzo[b]thiophen-4-yl)piperazin-1-yl)butanoic acid hydrochloride chemical structure](/media/structures/OFNDSFHGCHNKGZ-UHFFFAOYSA-N.svg)
4-(4-(Benzo[b]thiophen-4-yl)piperazin-1-yl)butanoic acid hydrochloride
- CAS
- 1191901-04-8
- Formula
- C16H21ClN2O2S
- MW
- 340.9 g/mol
VQ-044981
4-(4-(Methylsulfonyl)phenyl)-1-propyl-3-(p-tolyl)-1H-pyrrol-2-ol
- CAS
- 2305368-53-8
- Formula
- C21H23NO3S
- MW
- 369.5 g/mol
VQ-048671
4-(4-(Pyrimidin-2-yl)piperazin-1-yl)butan-1-amine
- CAS
- 33386-20-8
- Formula
- C12H21N5
- MW
- 235.33 g/mol
VQ-030980
4-(4-Amino-3-(4-amino-3-fluorophenoxy)phenoxy)-N-methylpicolinamide
- CAS
- 2098799-12-1
- Formula
- C19H17FN4O3
- MW
- 368.4 g/mol
VQ-041859
4-(4-Amino-3-chlorophenoxy)-7-methoxyquinoline-6-carbonitrile
- CAS
- 2023826-16-4
- Formula
- C17H12ClN3O2
- MW
- 325.7 g/mol
VQ-031484
4-(4-Amino-3-chlorophenoxy)-7-methoxyquinoline-6-carboxylic Acid
- CAS
- 2712290-12-3
- Formula
- C17H13ClN2O4
- MW
- 344.7 g/mol
VQ-037946
4-(4-Amino-5-(ethylsulfonyl)-2-methoxybenzamido)-5-(ethylsulfonyl)-2-methoxybenzoic Acid
- CAS
- 2471682-35-4
- Formula
- C20H24N2O9S2
- MW
- 500.5 g/mol
VQ-029121
4-(4-Aminophenyl)-2-(sec-butyl)-2,4-dihydro-3H-1,2,4-triazol-3-one
- CAS
- 2570971-58-1
- Formula
- C12H16N4O
- MW
- 232.28 g/mol
VQ-037769
4-(4-Bromo-3-((1-ethoxyethoxy)methyl)phenoxy)benzonitrile
- CAS
- 2585046-70-2
- Formula
- C18H18BrNO3
- MW
- 376.2 g/mol
VQ-029939
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