Coumarin 343
Also known as: Coumarin 519, Coumarin 343, laser grade, COUMARIN(RG), Coumarin343, Coumarin343, laser grade, KMG-20, MFCD00051335, RARECHEM AL BO 1145, COUMARIN 343, COUMARIN 519, 2,3,6,7-Tetrahydro-11-oxo-1H,5H,11H-[1]benzopyrano[6,7,8-ij]quinolizine-10-carboxylic acid, 11-Oxo-2,3,6,7-tetrahydro-1H,5H,11H-pyrano[2,3-f]pyrido[3,2,1-ij]quinoline-10-carboxylic acid
Coumarin 343 (CAS 55804-65-4) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C16H15NO4 and a molecular weight of 285.295 g/mol. Key properties include a melting point of 240ºC, a boiling point of 574.8±50.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 301.4±30.1 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 55804-65-4
- Jingsj CID
- J-23705-8
- Molecular Formula
- C16H15NO4
- Molecular Weight
- 285.295 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 240ºC |
|---|---|
| Boiling Point | 574.8±50.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 301.4±30.1 °C |
| Exact Mass | 285.100098 |
| PSA | 70.75000 |
| LogP | 3.20 |
| Vapor Pressure | 0.0±1.7 mmHg at 25°C |
| Refractive Index | 1.691 |
Activity & Biological Data
| Additional Information | [1]. Keiju Yamazaki, et al. Fluorometric analysis on physicochemical properties of phosphatidylcholine-based W/O microemulsion involved with enzymatic reactivity in phospholipid hydrolysis. Korean Journal of Chemical Engineering volume 25, pages 1439–1443 (2008). |
|---|
Frequently Asked Questions
What is the CAS number of Coumarin 343?
The CAS number of Coumarin 343 is 55804-65-4.
What are the molecular formula and molecular weight of Coumarin 343?
Coumarin 343 has molecular formula C16H15NO4 and molecular weight 285.295 g/mol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Coumarin 343 (CAS 55804-65-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-23705-8 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.