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
(2S,3R,4R,5S)-3-(3,4-Difluoro-2-methoxyphenyl)-4,5-dimethyl-5-(trifluoromethyl)tetrahydrofuran-2-carboxylic Acid
- CAS
- 3030223-34-5
- Formula
- C15H15F5O4
- MW
- 354.27 g/mol
VQ-028159
(2S,3R,6R)-6-Ethyl-3-methyl-2-(3-oxobutyl)-cyclohexanone
- CAS
- 958447-27-3
- Formula
- C13H22O2
- MW
- 210.31 g/mol
VQ-024364
![(2S,3R,6RS)-2-(3-Oxobutyl)-3-methyl-6-[(R)-2-propanal]cyclohexanone Mixture of Diastereomers chemical structure](/media/structures/RTBJZMMNKXQFDB-AFEADNKKSA-N.svg)
(2S,3R,6RS)-2-(3-Oxobutyl)-3-methyl-6-[(R)-2-propanal]cyclohexanone Mixture of Diastereomers
- CAS
- 1093625-96-7
- Formula
- C14H22O3
- MW
- 238.32 g/mol
VQ-020834
(2S,3R)-2-(2,4-Difluorophenyl)-1-(1H-1,2,4-triazol-1-yl)-2,3-butanediol
- CAS
- 135272-36-5
- Formula
- C12H13F2N3O2
- MW
- 269.25 g/mol
VQ-025489
![(2S,3R)-2-(2,4-Difluorophenyl)-3-methyl-2-[(1H-1,2,4-triazol-1-yl)methyl]oxirane chemical structure](/media/structures/QANJLSHZDUOBBP-PELKAZGASA-N.svg)
(2S,3R)-2-(2,4-Difluorophenyl)-3-methyl-2-[(1H-1,2,4-triazol-1-yl)methyl]oxirane
- CAS
- 135270-07-4
- Formula
- C12H11F2N3O
- MW
- 251.23 g/mol
VQ-022495
(2S,3R)-3-(tert-Butoxycarbonylamino)-1,2-epoxy-4-phenylbutane
- CAS
- 156474-22-5
- Formula
- C15H21NO3
- MW
- 263.33 g/mol
VQ-027124
(2S,3R)-Ethyl 3-((R)-2,2-Dimethyl-1,3-Dioxolan-4-yl)-2,3-Dihydroxy-2-Methylpropanoate
- CAS
- 93635-76-8
- Formula
- C11H20O6
- MW
- 248.27 g/mol
VQ-043304
(2S,3S,4R,5S)-3,4,5-Trihydroxy-2-piperidinecarboxylic acid
- CAS
- 129797-28-0
- Formula
- C6H11NO5
- MW
- 177.16 g/mol
VQ-035318
(2S,3S,4S,5R,6S)-6-(4-Chloro-3-(4-ethoxybenzyl)phenyl)-3,4,5-trihydroxy-6-methoxytetrahydro-2H-pyran-2-carboxylic Acid
- CAS
- 1528636-47-6
- Formula
- C22H25ClO8
- MW
- 452.9 g/mol
VQ-037066
(2S,3S,4S,5R)-2-(4-Chloro-3-(4-ethoxybenzyl)phenyl)-5-((R)-1,2-diacetoxyethyl)tetrahydrofuran-3,4-diyl diacetate
- CAS
- 1469910-84-6
- Formula
- C29H33ClO10
- MW
- 577 g/mol
VQ-036521
![(2S,3S,5R)-3-((2H-1,2,3-Triazol-2-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 4,4-dioxide chemical structure](/media/structures/ZXLMQBJFPFROPC-WEDXCCLWSA-N.svg)
(2S,3S,5R)-3-((2H-1,2,3-Triazol-2-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 4,4-dioxide
- CAS
- 765233-56-5
- Formula
- C10H12N4O5S
- MW
- 300.29 g/mol
VQ-044883
(2S,3S)-2-(2,4-Difluorophenyl)-1-(1H-1,2,4-triazol-1-yl)butane-2,3-diol
- CAS
- 135270-05-2
- Formula
- C12H13F2N3O2
- MW
- 269.25 g/mol
VQ-030394
(2S,3S)-2-(2,4-Difluorophenyl)-3-(5-fluoropyrimidin-4-yl)-1-(1H-1,2,4-triazol-1-yl)butan-2-ol
- CAS
- 239807-04-6
- Formula
- C16H14F3N5O
- MW
- 349.31 g/mol
VQ-043913
![(2S,3S)-2-(2,4-Difluorophenyl)-3-methyl-2-[(1H-1,2,4-triazol-1-yl)methyl]oxirane chemical structure](/media/structures/QANJLSHZDUOBBP-UFBFGSQYSA-N.svg)
(2S,3S)-2-(2,4-Difluorophenyl)-3-methyl-2-[(1H-1,2,4-triazol-1-yl)methyl]oxirane
- CAS
- 135270-10-9
- Formula
- C12H11F2N3O
- MW
- 251.23 g/mol
VQ-030393
(2S,3S)-2-Amino-3-methyl-3-sulfino-4-(1H-1,2,3-triazol-1-yl)butanoic Acid
- CAS
- 120701-87-3
- Formula
- C7H12N4O4S
- MW
- 248.26 g/mol
VQ-021347
Need a price, a spec or a custom compound?
Send us your list — product names or CAS numbers, grade, quantity and destination. Our team replies with a formal quotation, COA and lead time.