4,5-Diazafluoren-9-one
Also known as: DAFO, 4,5-Diaza-9-fluorenone, 4,5-Diazafluorene-9-one, 5H-Cyclopenta[2,1-b:3,4-b']dipyridin-5-one, 5H-Cyclopenta[1,2-b:5,4-b']dipyridin-5-one, 5H-Pyrido[3',2':4,5]cyclopenta[1,2-b]pyridin-5-one, 4,5-Diaz-a-9-fluorenone
4,5-Diazafluoren-9-one (CAS 50890-67-0) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C11H6N2O and a molecular weight of 182.178 g/mol. Key properties include a melting point of 214-217ºC(lit.), a boiling point of 396.3±17.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 196.1±27.4 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. It is listed by 2 suppliers, 1 of which publish reference prices, from 22.98 to 38.80 CNY. Record last updated Aug 21, 2026.
- CAS No.
- 50890-67-0
- Jingsj CID
- J-32666-3
- Molecular Formula
- C11H6N2O
- Molecular Weight
- 182.178 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
In Stock | 98% 500g | ¥11,490.00 | $3.44 /gBest ¥22.98/g CNY | CN China MOQ 500g | |
In Stock | 98% 100g | ¥2,870.00 | $4.29 /g ¥28.70/g CNY | CN China MOQ 100g | |
In Stock | 98% 25g | ¥721.00 | $4.32 /g ¥28.84/g CNY | CN China MOQ 25g |
Physicochemical Properties
| Melting Point | 214-217ºC(lit.) |
|---|---|
| Boiling Point | 396.3±17.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 196.1±27.4 °C |
| Exact Mass | 182.048019 |
| PSA | 42.85000 |
| LogP | 0.98 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.689 |
| Additional Property | Soluble in dichloromethane, tetrahydrofuran, chloroform, benzene, toluene and polar organic solvents. Insoluble in diethyl ether and alkanes. |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2933399090 |
|---|---|
| Summary | 2933399090. other compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 4,5-Diazafluoren-9-one?
The CAS number of 4,5-Diazafluoren-9-one is 50890-67-0.
What are the molecular formula and molecular weight of 4,5-Diazafluoren-9-one?
4,5-Diazafluoren-9-one has molecular formula C11H6N2O and molecular weight 182.178 g/mol.
Which suppliers offer 4,5-Diazafluoren-9-one?
2 supplier(s) listed; reference unit price ¥22.98–38.80 /g.
Is 4,5-Diazafluoren-9-one hazardous?
4,5-Diazafluoren-9-one has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 4,5-Diazafluoren-9-one?
For 4,5-Diazafluoren-9-one, Upstream Products: 1,10-Phenanthroline, 5-Nitro-1,10-phenanthroline, 1,10-Phenanthroline-5,6-dione.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4,5-Diazafluoren-9-one (CAS 50890-67-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-32666-3 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.