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
5-(4-Nitrophenyl)-2-furaldehyde-(2-carboxymethyl) Semicarbazone
- CAS
- 57268-33-4
- Formula
- C14H12N4O6
- MW
- 332.27 g/mol
VQ-025160
![5-(4'-(Bromomethyl)-[1,1'-biphenyl]-2-yl)-2-trityl-2H-tetrazole chemical structure](/media/structures/WROIFZUSIQAQBZ-UHFFFAOYSA-N.svg)
5-(4'-(Bromomethyl)-[1,1'-biphenyl]-2-yl)-2-trityl-2H-tetrazole
- CAS
- 133051-88-4
- Formula
- C33H25BrN4
- MW
- 557.5 g/mol
VQ-021263
![5-(4'-(Chloromethyl)-[1,1'-biphenyl]-2-yl)-1-trityl-1H-tetrazole chemical structure](/media/structures/JTMXGVYJRSHVDG-UHFFFAOYSA-N.svg)
5-(4'-(Chloromethyl)-[1,1'-biphenyl]-2-yl)-1-trityl-1H-tetrazole
- CAS
- 885216-74-0
- Formula
- C33H25ClN4
- MW
- 513 g/mol
VQ-043198
![5-(4'-(Dibromomethyl)-[1,1'-biphenyl]-2-yl)-1-trityl-1H-tetrazole chemical structure](/media/structures/XADJWXJJVWQFNM-UHFFFAOYSA-N.svg)
5-(4'-(Dibromomethyl)-[1,1'-biphenyl]-2-yl)-1-trityl-1H-tetrazole
- CAS
- 358685-13-9
- Formula
- C33H24Br2N4
- MW
- 636.4 g/mol
VQ-032235
![5-(4'-(Dibromomethyl)-[1,1'-biphenyl]-2-yl)-1H-tetrazole chemical structure](/media/structures/OUFHUABYUDULJL-UHFFFAOYSA-N.svg)
5-(4'-(Dibromomethyl)-[1,1'-biphenyl]-2-yl)-1H-tetrazole
- CAS
- 1127249-17-5
- Formula
- C14H10Br2N4
- MW
- 394.06 g/mol
VQ-026214
![5-(5-Carboxy-2-ethoxyphenyl)-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one chemical structure](/media/structures/UUNWDXYDLDBMRV-UHFFFAOYSA-N.svg)
5-(5-Carboxy-2-ethoxyphenyl)-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
- CAS
- 147676-78-6
- Formula
- C18H20N4O4
- MW
- 356.4 g/mol
VQ-028023
![5-(5'-Chloro-4,4''-bis(methylsulfonyl)-[1,1':3',1''-terphenyl]-2'-yl)-2-methylpyridine chemical structure](/media/structures/KCARQSBAENOGAN-UHFFFAOYSA-N.svg)
5-(5'-Chloro-4,4''-bis(methylsulfonyl)-[1,1':3',1''-terphenyl]-2'-yl)-2-methylpyridine
- CAS
- 646459-51-0
- Formula
- C26H22ClNO4S2
- MW
- 512 g/mol
VQ-035361
5-(Acetylimino)-4,5-dihydro-4-methyl-1,3,4-thiadiazole-2-sulfonic Acid
- CAS
- 1312679-00-7
- Formula
- C5H7N3O4S2
- MW
- 237.3 g/mol
VQ-038349
5-(Aminomethyl)-2-methylpyrimidin-4-amine hydrochloride
- CAS
- 1195-07-9
- Formula
- C6H11ClN4
- MW
- 174.63 g/mol
VQ-042488
5-(Biphenyl-4-ylmethylidene)imidazolidine-2,4-dione
- CAS
- 110932-42-8
- Formula
- C16H12N2O2
- MW
- 264.28 g/mol
VQ-032815
![5-(Difluoromethoxy)-1,3-dihydro-2H-benzo[d]imidazol-2-one chemical structure](/media/structures/WGSZJVSNGVDBHX-UHFFFAOYSA-N.svg)
5-(Difluoromethoxy)-1,3-dihydro-2H-benzo[d]imidazol-2-one
- CAS
- 1806469-15-7
- Formula
- C8H6F2N2O2
- MW
- 200.14 g/mol
VQ-033048
5-(Isopropoxycarbonyl)-2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3-carboxylic Acid
- CAS
- 74936-69-9
- Formula
- C18H20N2O6
- MW
- 360.4 g/mol
VQ-044399
5-(Mercaptomethyl)-3-(((5-nitrofuran-2-yl)methylene)amino)oxazolidin-2-one
- CAS
- 34143-33-4
- Formula
- C9H9N3O5S
- MW
- 271.25 g/mol
VQ-035095
5-(Methoxycarbonyl)-2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3-carboxylic Acid
- CAS
- 74936-71-3
- Formula
- C16H16N2O6
- MW
- 332.31 g/mol
VQ-035932
5-(Methoxycarbonyl)-2,6-dimethyl-4-(4-nitrophenyl)-1,4-dihydropyridine-3-carboxylic Acid
- CAS
- 166808-97-5
- Formula
- C16H16N2O6
- MW
- 332.31 g/mol
VQ-044371
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