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
(Butyryloxy)methyl 2-(2,3-dichlorobenzylidene)-3-oxobutanoate
- CAS
- 1020718-27-7
- Formula
- C16H16Cl2O5
- MW
- 359.2 g/mol
VQ-036370
(E,E)-1,1'-((((5-Methyl-1H-imidazole-2,4-diyl)bis(methylene))bis(sulfanediyl))bis(ethane-2,1-diyl))bis(2-cyano-3-methylguanidine)
- CAS
- 182685-55-8
- Formula
- C16H26N10S2
- MW
- 422.6 g/mol
VQ-024970
![(E)-(-)-Octahydrocyclopenta[b]pyrrole-2-carboxylic acid hydrochloride chemical structure](/media/structures/GEHZXRQNVRDLEB-MKXDVQRUSA-N.svg)
(E)-(-)-Octahydrocyclopenta[b]pyrrole-2-carboxylic acid hydrochloride
- CAS
- 87269-86-1
- Formula
- C8H14ClNO2
- MW
- 191.65 g/mol
VQ-048664
(E)-1-((3-(6-(2-Carboxyvinyl)pyridin-2-yl)-3-(p-tolyl)oxiran-2-yl)methyl)pyrrolidine 1-oxide
- CAS
- 2064110-23-0
- Formula
- C22H24N2O4
- MW
- 380.44 g/mol
VQ-029020
(E)-1-(3-Ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethen-1-amine
- CAS
- 1715011-38-3
- Formula
- C12H17NO4S
- MW
- 271.33 g/mol
VQ-024337
![(E)-1-(Benzo[b]thiophen-2-yl)ethanone oxime chemical structure](/media/structures/LYNWDHNMGAKITE-YRNVUSSQSA-N.svg)
![(E)-1-(Benzo[d][1,3]dioxol-5-yl)-4,4-dimethylpent-1-en-3-one chemical structure](/media/structures/LXFNQCGNCFRKRR-FNORWQNLSA-N.svg)
(E)-1-(Benzo[d][1,3]dioxol-5-yl)-4,4-dimethylpent-1-en-3-one
- CAS
- 144850-45-3
- Formula
- C14H16O3
- MW
- 232.27 g/mol
VQ-033946
![(E)-1,1'-[2-(2,4-Difluorophenyl)-1-propene-1,3-diyl]bis-1H-1,2,4-triazole chemical structure](/media/structures/SVCXBLVWACGQFG-WMZJFQQLSA-N.svg)
(E)-1,1'-[2-(2,4-Difluorophenyl)-1-propene-1,3-diyl]bis-1H-1,2,4-triazole
- CAS
- 163921-61-7
- Formula
- C13H10F2N6
- MW
- 288.26 g/mol
VQ-030771
![(E)-2-(((1-(2-Aminothiazol-4-yl)-2-((3-Methyl-1,7-dioxo-1,4,5a,6-tetrahydro-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl)Amino)-2-Oxoethylidene)Amino)oxy)acetic Acid](/media/pack/e-2-1-2-aminothiazol-4-yl-2-3-methyl-17-dioxo-145a6-tetrahydro-3h7h-azeto21-bfuro34.svg?v=3)
(E)-2-(((1-(2-Aminothiazol-4-yl)-2-((3-Methyl-1,7-dioxo-1,4,5a,6-tetrahydro-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl)Amino)-2-Oxoethylidene)Amino)oxy)acetic Acid
- CAS
- 108636-27-7
- Formula
- C16H15N5O7S2
- MW
- 453.44 g/mol
VQ-035257
![(E)-2-(((4-(N'-((Hexyloxy)carbonyl)carbamimidoyl)phenyl)amino)methyl)-1-methyl-1H-benzo[d]imidazole-5-carboxylic Acid](/media/pack/e-2-4-n-hexyloxycarbonylcarbamimidoylphenylaminomethyl-1-methyl-1h-benzodimidazole-5.svg?v=3)
(E)-2-(((4-(N'-((Hexyloxy)carbonyl)carbamimidoyl)phenyl)amino)methyl)-1-methyl-1H-benzo[d]imidazole-5-carboxylic Acid
- CAS
- 2459303-30-9
- Formula
- C24H29N5O4
- MW
- 451.52 g/mol
VQ-047913
![(E)-2-(1-(2-Fluorobenzyl)-1H-pyrazolo[3,4-b]pyridin-3-yl)-5-(phenyldiazenyl)pyrimidine-4,6-diamine chemical structure](/media/structures/NSYPPYLRJKGGOV-UHFFFAOYSA-N.svg)
(E)-2-(1-(2-Fluorobenzyl)-1H-pyrazolo[3,4-b]pyridin-3-yl)-5-(phenyldiazenyl)pyrimidine-4,6-diamine
- CAS
- 370879-49-5
- Formula
- C23H18FN9
- MW
- 439.4 g/mol
VQ-041920
(E)-2-(2-Aminoethyl)but-2-enoic Acid Hydrochloride
- CAS
- 1379403-11-8
- Formula
- C6H12ClNO2
- MW
- 165.62 g/mol
VQ-024003
(E)-2-(2-Aminothiazol-4-yl)-2-(methoxyimino)acetic Acid
- CAS
- 66341-09-1
- Formula
- C6H7N3O3S
- MW
- 201.21 g/mol
VQ-036197
(E)-2-(4-((4-(Piperidin-1-ylmethyl)pyridin-2-yl)oxy)but-2-en-1-yl)isoindoline-1,3-dione
- CAS
- 146270-00-0
- Formula
- C23H25N3O3
- MW
- 391.5 g/mol
VQ-037859
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