6-(5-Chloro-2-pyridyl)-6,7-dihydro-7-hydroxy-5H-pyrrolo[3,4-b]pyrazin-5-one
6-(5-氯-2-吡啶基)-6,7-二氢-7-羟基-5H-吡咯并[3,4-b]吡嗪-5-酮
Also known as: Zopiclone EP Impurity B, Zopiclone Impurity B, Eszopiclone Impurity B, 6-(5-Chloropyridin-2-yl)-7-hydroxy-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazin-5-one, RP 29307, Intermediate II for Zopiclone, Zopiclone intermediate
6-(5-Chloro-2-pyridyl)-6,7-dihydro-7-hydroxy-5H-pyrrolo[3,4-b]pyrazin-5-one (CAS 43200-81-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H7ClN4O2 and a molecular weight of 262.652 g/mol. It is also known as Zopiclone EP Impurity B, Zopiclone Impurity B and Eszopiclone Impurity B. Key properties include a melting point of 240.5-241.5ºC, a boiling point of 525.2±50.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 271.5±30.1 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 43200-81-3
- Jingsj CID
- J-1407174-4
- Molecular Formula
- C11H7ClN4O2
- Chinese Name
- 6-(5-氯-2-吡啶基)-6,7-二氢-7-羟基-5H-吡咯并[3,4-b]吡嗪-5-酮
- Molecular Weight
- 262.652 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 240.5-241.5ºC |
|---|---|
| Boiling Point | 525.2±50.0 °C at 760 mmHg |
| Density | 1.7±0.1 g/cm3 |
| Flash Point | 271.5±30.1 °C |
Frequently Asked Questions
What is the CAS number of 6-(5-Chloro-2-pyridyl)-6,7-dihydro-7-hydroxy-5H-pyrrolo[3,4-b]pyrazin-5-one?
The CAS number of 6-(5-Chloro-2-pyridyl)-6,7-dihydro-7-hydroxy-5H-pyrrolo[3,4-b]pyrazin-5-one is 43200-81-3.
What are the molecular formula and molecular weight of 6-(5-Chloro-2-pyridyl)-6,7-dihydro-7-hydroxy-5H-pyrrolo[3,4-b]pyrazin-5-one?
6-(5-Chloro-2-pyridyl)-6,7-dihydro-7-hydroxy-5H-pyrrolo[3,4-b]pyrazin-5-one has molecular formula C11H7ClN4O2 and molecular weight 262.652 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "6-(5-Chloro-2-pyridyl)-6,7-dihydro-7-hydroxy-5H-pyrrolo[3,4-b]pyrazin-5-one (CAS 43200-81-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1407174-4 (accessed 2026-10-26).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.