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
1-(Isopropylamino)-3-(naphthalen-2-yloxy)propan-2-ol
- CAS
- 2007-72-9
- Formula
- C16H21NO2
- MW
- 259.34 g/mol
VQ-032576
1-(L-Phenylalanyl-L-phenylalanyl-L-leucyl-L-lysyl)-4-aminopiperidine-4-carboxylic Acid
- CAS
- 2742623-84-1
- Formula
- C36H53N7O6
- MW
- 679.8 g/mol
VQ-036696
1-(Phenylcarbamoyl)cyclopropane-1-carboxylic Acid
- CAS
- 145591-80-6
- Formula
- C11H11NO3
- MW
- 205.21 g/mol
VQ-044567
![1-(Prop-1-en-2-yl)-1H-benzo[d]imidazol-2(3H)-one chemical structure](/media/structures/XFASJWLBXHWUMW-UHFFFAOYSA-N.svg)
![1-(Pyridin-4-yl)-1,3-dihydro-2H-benzo[d]imidazol-2-one chemical structure](/media/structures/UVWOQPKLEXKDIE-UHFFFAOYSA-N.svg)
1-(Pyridin-4-yl)-1,3-dihydro-2H-benzo[d]imidazol-2-one
- CAS
- 110763-56-9
- Formula
- C12H9N3O
- MW
- 211.22 g/mol
VQ-036837
![1-(tert-Butyl)-3-((5-chloro-3-(chloromethyl)pyridin-2-yl)methyl)-1,3-dihydro-2H-pyrrolo[2,3-b]pyridin-2-one chemical structure](/media/structures/FTSHSJVGEQJSDN-UHFFFAOYSA-N.svg)
1-(tert-Butyl)-3-((5-chloro-3-(chloromethyl)pyridin-2-yl)methyl)-1,3-dihydro-2H-pyrrolo[2,3-b]pyridin-2-one
- CAS
- 1455358-12-9
- Formula
- C18H19Cl2N3O
- MW
- 364.3 g/mol
VQ-035820
1-(tert-Butyl)2-methyl(2S,4R)-4-(4-(3-methyl-1-phenyl-1H-pyrazol-5-yl)piperazin-1-yl)pyrrolidine-1,2-dicarboxylate
- CAS
- 2131105-24-1
- Formula
- C25H35N5O4
- MW
- 469.6 g/mol
VQ-042409
1-(Trifluoroacetyl)-1,4,8,11-Tetraazacyclotetradecane
- CAS
- 548488-49-9
- Formula
- C12H23F3N4O
- MW
- 296.33 g/mol
VQ-043697
![1-[(2-Chlorophenyl)phenylmethyl]piperazine chemical structure](/media/structures/RLZPNIGECDMAJH-UHFFFAOYSA-N.svg)
![1-[(2'-Carbamoylbiphenyl-4-yl) methyl]-2-ethoxybenzimidazole-7-carboxylic Acid chemical structure](/media/structures/DEKJJZVBGQUKPQ-UHFFFAOYSA-N.svg)
1-[(2'-Carbamoylbiphenyl-4-yl) methyl]-2-ethoxybenzimidazole-7-carboxylic Acid
- CAS
- 1696392-11-6
- Formula
- C24H21N3O4
- MW
- 415.4 g/mol
VQ-020868
![1-[(2R)-3-Mercapto-2-methyl-1-oxopropyl]-D-proline chemical structure](/media/structures/FAKRSMQSSFJEIM-NKWVEPMBSA-N.svg)
1-[(2R)-3-Mercapto-2-methyl-1-oxopropyl]-D-proline
- CAS
- 112243-88-6
- Formula
- C9H15NO3S
- MW
- 217.29 g/mol
VQ-021990
![1-[(4-Chlorophenyl)methyl]-2,3-dihydroimidazo[1,2-a]pyridinium Chloride chemical structure](/media/structures/IVVQBHCLPSZZKR-UHFFFAOYSA-M.svg)
1-[(4-Chlorophenyl)methyl]-2,3-dihydroimidazo[1,2-a]pyridinium Chloride
- CAS
- 63111-28-4
- Formula
- C14H14Cl2N2
- MW
- 281.2 g/mol
VQ-036250
![1-[(4-Fluorophenyl)methyl]-3-[(4-isobutoxyphenyl)methyl]urea chemical structure](/media/structures/OYVDGFJEADMXOK-UHFFFAOYSA-N.svg)
1-[(4-Fluorophenyl)methyl]-3-[(4-isobutoxyphenyl)methyl]urea
- CAS
- 1388858-78-3
- Formula
- C19H23FN2O2
- MW
- 330.4 g/mol
VQ-027489
![1-[(4-Hydrazinophenyl)methyl]-1H-1,2,4-triazole hydrochloride chemical structure](/media/structures/WTSGWKNUHMEHOH-UHFFFAOYSA-N.svg)
1-[(4-Hydrazinophenyl)methyl]-1H-1,2,4-triazole hydrochloride
- CAS
- 154748-67-1
- Formula
- C9H12ClN5
- MW
- 225.68 g/mol
VQ-033621
![1-[(4R,5R)-4,5-Dihydroxy-L-ornithine]-Echinocandin B Hydrochloride chemical structure](/media/structures/FKIXKMLIKIOEJP-WJXYPMDHSA-N.svg)
1-[(4R,5R)-4,5-Dihydroxy-L-ornithine]-Echinocandin B Hydrochloride
- CAS
- 1029890-89-8
- Formula
- C34H52ClN7O15
- MW
- 834.3 g/mol
VQ-024302
![1-[(4S)-2-(4-Fluoro-3,5-dimethylphenyl)-4-methyl-4,5,6,7-tetrahydropyrazolo[4,3-c]pyridin-3-yl]-3-(4-fluoro-1-methylindazol-5-yl)imidazol-2-one chemical structure](/media/structures/RUAXBTGNBAFEOY-INIZCTEOSA-N.svg)
1-[(4S)-2-(4-Fluoro-3,5-dimethylphenyl)-4-methyl-4,5,6,7-tetrahydropyrazolo[4,3-c]pyridin-3-yl]-3-(4-fluoro-1-methylindazol-5-yl)imidazol-2-one
- CAS
- 2212022-56-3
- Formula
- C26H25F2N7O
- MW
- 489.5 g/mol
VQ-040142
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