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
Ethyl 7-Chloro-1-cyclopropyl-6-fluoro-4-oxoquinoline-3-carboxylate
- CAS
- 86483-54-7
- Formula
- C15H13ClFNO3
- MW
- 309.72 g/mol
VQ-032522
![Ethyl 7-chloro-5-oxo-1-tosyl-2,3,4,5-tetrahydro-1H-benzo[b]azepine-4-carboxylate chemical structure](/media/structures/JCSQLIDJOVIORL-UHFFFAOYSA-N.svg)
Ethyl 7-chloro-5-oxo-1-tosyl-2,3,4,5-tetrahydro-1H-benzo[b]azepine-4-carboxylate
- CAS
- 1133419-00-7
- Formula
- C20H20ClNO5S
- MW
- 421.9 g/mol
VQ-028455
![Ethyl 8-(2,4-dioxo-2H-benzo[e][1,3]oxazin-3(4H)-yl)octanoate chemical structure](/media/structures/TVGHIGDQGYWONS-UHFFFAOYSA-N.svg)
Ethyl 8-(2,4-dioxo-2H-benzo[e][1,3]oxazin-3(4H)-yl)octanoate
- CAS
- 287935-37-9
- Formula
- C18H23NO5
- MW
- 333.4 g/mol
VQ-023729
![Ethyl 8-isocyano-2,2-dimethyl-8-[(4-methylphenyl)sulfonyl]octanoate chemical structure](/media/structures/SMEKVLIENUHGPZ-UHFFFAOYSA-N.svg)
Ethyl 8-isocyano-2,2-dimethyl-8-[(4-methylphenyl)sulfonyl]octanoate
- CAS
- 738607-02-8
- Formula
- C20H29NO4S
- MW
- 379.5 g/mol
VQ-024517
![Ethyl 9,10-difluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate chemical structure](/media/structures/TZSXJUSNOOBBOP-UHFFFAOYSA-N.svg)
Ethyl 9,10-difluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
- CAS
- 82419-34-9
- Formula
- C15H13F2NO4
- MW
- 309.26 g/mol
VQ-048874
![Ethyl benzo[b][1,4]dioxine-2-carboxylate chemical structure](/media/structures/HYAIFRZTFJBMMC-UHFFFAOYSA-N.svg)
![Ethyl chloro[(4-methoxyphenyl)hydrazono]acetate chemical structure](/media/structures/ATNPZEGMKLGIFA-UVTDQMKNSA-N.svg)
Ethyl chloro[(4-methoxyphenyl)hydrazono]acetate
- CAS
- 27143-07-3
- Formula
- C11H13ClN2O3
- MW
- 256.68 g/mol
VQ-024325
Ethyl N-(2,6-dimethylphenyl)-N-(1,1-dioxidotetrahydro-2H-thiopyran-4-carbonyl)glycinate
- CAS
- 625117-31-9
- Formula
- C18H25NO5S
- MW
- 367.5 g/mol
VQ-024232
![Ethyl N-[[4-[2-[(5-chloro-2-methoxybenzoyl)amino]ethyl]phenyl]sulfonyl]carbamate chemical structure](/media/structures/QQBBSWCTNXVUBY-UHFFFAOYSA-N.svg)
Ethyl N-[[4-[2-[(5-chloro-2-methoxybenzoyl)amino]ethyl]phenyl]sulfonyl]carbamate
- CAS
- 14511-59-2
- Formula
- C19H21ClN2O6S
- MW
- 440.9 g/mol
VQ-048533
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