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-Fluoro-3,5-dimethylphenyl)hydrazine hydrochloride
- CAS
- 2212021-40-2
- Formula
- C8H12ClFN2
- MW
- 190.64 g/mol
VQ-038782
(4-Methoxy-3-methylpyridin-2-yl)methanol Hydrochloride
- CAS
- 253345-81-2
- Formula
- C8H12ClNO2
- MW
- 189.64 g/mol
VQ-048645
(4-Methyl-6-(2,4,4-trimethylpentyl)-2H-pyran-2-one)
- CAS
- 50650-75-4
- Formula
- C14H22O2
- MW
- 222.32 g/mol
VQ-041523
![(4-Methylbenzo[4,5]imidazo[1,2-b]pyrido[1,2-d][1,2,4]thiadiazin-3-ol)](/media/pack/4-methylbenzo45imidazo12-bpyrido12-d124thiadiazin-3-ol.svg?v=3)
(4-Methylbenzo[4,5]imidazo[1,2-b]pyrido[1,2-d][1,2,4]thiadiazin-3-ol)
- CAS
- 2518281-98-4
- Formula
- C14H11N3OS
- MW
- 269.3 g/mol
VQ-031441
(4-Nitrophenyl) 2-(furan-2-ylmethylsulfanyl)acetate
- CAS
- 118287-86-8
- Formula
- C13H11NO5S
- MW
- 293.3 g/mol
VQ-037862
![(4AR,4bS,6aS,7R,9aS,9bS,11aR)-N-(tert-Butyl)-4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide chemical structure](/media/structures/DBEPLOCGEIEOCV-WYNQROEXSA-N.svg)
(4AR,4bS,6aS,7R,9aS,9bS,11aR)-N-(tert-Butyl)-4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide
- CAS
- 140375-21-9
- Formula
- C23H36N2O2
- MW
- 372.5 g/mol
VQ-037268
![(4AR,4bS,6aS,7S,9aS,9bS,11aS)-4a,6a-Dimethyl-2-oxohexadecahydro-1H-indeno[5,4-f]quinoline-7-carboxylic acid chemical structure](/media/structures/MJXIPHMGYJXKLJ-NNXGRLFDSA-N.svg)
(4AR,4bS,6aS,7S,9aS,9bS,11aS)-4a,6a-Dimethyl-2-oxohexadecahydro-1H-indeno[5,4-f]quinoline-7-carboxylic acid
- CAS
- 1430804-94-6
- Formula
- C19H29NO3
- MW
- 319.4 g/mol
VQ-030342
![(4AR,4bS,6aS,7S,9aS,9bS)-N-(1,1-Dimethylethyl)-2,3,4,4a,4b,5,6,6a,7,8,9,9a,9b,10-tetradecahydro-4a,6a-dimethyl-2-oxo-1H-indeno[5,4-f]quinoline-7-carboxamide chemical structure](/media/structures/IHYQEUFHHYXVFL-FIIPNDBVSA-N.svg)
(4AR,4bS,6aS,7S,9aS,9bS)-N-(1,1-Dimethylethyl)-2,3,4,4a,4b,5,6,6a,7,8,9,9a,9b,10-tetradecahydro-4a,6a-dimethyl-2-oxo-1H-indeno[5,4-f]quinoline-7-carboxamide
- CAS
- 166896-74-8
- Formula
- C23H36N2O2
- MW
- 372.5 g/mol
VQ-030736
![(4AR,7aS)-6-benzyloctahydro-1H-pyrrolo[3,4-b]pyridine chemical structure](/media/structures/AFYZAHZKOFBVLE-ZIAGYGMSSA-N.svg)
(4AR,7aS)-6-benzyloctahydro-1H-pyrrolo[3,4-b]pyridine
- CAS
- 2165705-66-6
- Formula
- C14H20N2
- MW
- 216.32 g/mol
VQ-049162
![(4AR,7aS)-Octahydro-1H-pyrrolo[3,4-b]pyridine dihydrochloride chemical structure](/media/structures/PBDBVGLZVIIZNU-GPJOBVNKSA-N.svg)
(4AR,7aS)-Octahydro-1H-pyrrolo[3,4-b]pyridine dihydrochloride
- CAS
- 2306255-12-7
- Formula
- C7H16Cl2N2
- MW
- 199.12 g/mol
VQ-049176
![(4AS,7aR)-Octahydro-1H-pyrrolo[3,4-b]pyridine dihydrochloride chemical structure](/media/structures/PBDBVGLZVIIZNU-JFYKYWLVSA-N.svg)
(4AS,7aR)-Octahydro-1H-pyrrolo[3,4-b]pyridine dihydrochloride
- CAS
- 2306249-33-0
- Formula
- C7H16Cl2N2
- MW
- 199.12 g/mol
VQ-049177
![(4AS,7aS)-Octahydro-1-methyl-1H-pyrrolo[3,4-b]pyridine chemical structure](/media/structures/QVLUVOZDWSAEIP-JGVFFNPUSA-N.svg)
(4AS,7aS)-Octahydro-1-methyl-1H-pyrrolo[3,4-b]pyridine
- CAS
- 151213-45-5
- Formula
- C8H16N2
- MW
- 140.23 g/mol
VQ-026787
(4BR,8aR,9R)-3-Methoxy-6,7,8,8a,9,10-hexahydro-5H-9,4b-(epiminoethano)phenanthrene-11-carbaldehyde
- CAS
- 51745-06-3
- Formula
- C18H23NO2
- MW
- 285.4 g/mol
VQ-048006
![(4R,12AR)-7-Methoxy-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid chemical structure](/media/structures/KGWJKKUSXSBPSK-VXNVDRBHSA-N.svg)
(4R,12AR)-7-Methoxy-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid
- CAS
- 2315439-81-5
- Formula
- C14H16N2O6
- MW
- 308.29 g/mol
VQ-030263
![(4R,12AS)-N-Benzyl-7-methoxy-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxamide](/media/pack/4r12as-n-benzyl-7-methoxy-4-methyl-68-dioxo-34681212a-hexahydro-2h-pyrido12-45pyrazino21.svg?v=3)
(4R,12AS)-N-Benzyl-7-methoxy-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxamide
- CAS
- 2244245-34-7
- Formula
- C21H23N3O5
- MW
- 397.43 g/mol
VQ-036777
![(4R,4AS,7aR,12bS)-3-(Cyclopropylmethyl)-4a,9-dihydroxy-2,3,4,4a-tetrahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinolin-7(7aH)-one chemical structure](/media/structures/IXTUHFUWSPWDEZ-XFWGSAIBSA-N.svg)
(4R,4AS,7aR,12bS)-3-(Cyclopropylmethyl)-4a,9-dihydroxy-2,3,4,4a-tetrahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinolin-7(7aH)-one
- CAS
- 123086-68-0
- Formula
- C20H21NO4
- MW
- 339.4 g/mol
VQ-026834
![(4R,4AS,7S,7aR,12bS)-3-(Cyclobutylmethyl)-1,2,3,4,7,7a-hexahydro-4aH-4,12-methanobenzofuro[3,2-e]isoquinoline-4a,7,9-triol](/media/pack/4r4as7s7ar12bs-3-cyclobutylmethyl-123477a-hexahydro-4ah-412-methanobenzofuro32.svg?v=3)
(4R,4AS,7S,7aR,12bS)-3-(Cyclobutylmethyl)-1,2,3,4,7,7a-hexahydro-4aH-4,12-methanobenzofuro[3,2-e]isoquinoline-4a,7,9-triol
- CAS
- 66944-73-8
- Formula
- C21H25NO4
- MW
- 355.43 g/mol
VQ-044579
(4R,5R)-2,2-Dimethyl-5-vinyl-1,3-dioxolane-4-carbaldehyde
- CAS
- 155934-55-7
- Formula
- C8H12O3
- MW
- 156.18 g/mol
VQ-034256
(4R,5R)-3-Benzoyl-2-(4-anisyl)-4-phenyl-5-oxazolidinecarboxylic acid
- CAS
- 1262147-55-6
- Formula
- C24H21NO5
- MW
- 403.4 g/mol
VQ-024717
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