4-Methyl-2H-1,4-benzoxazin-3(4H)-one
Also known as: 4-Methyl-2H-1,4-benzoxazin-3-one, 4-Methyl-2H-benzo[b][1,4]oxazin-3(4H)-one, 4-Methyl-3,4-dihydro-2H-1,4-benzoxazin-3-one, 4-Methyl-3-oxo-2,3-dihydro-4H-1,4-benzoxazine, 4-Methyl-4H-benzo[1,4]oxazin-3-one, 4-Methylbenzo[b]morpholin-3-one, 4-(N-Methyl)-1,4-benzoxazine-3-one
4-Methyl-2H-1,4-benzoxazin-3(4H)-one (CAS 21744-84-3) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C9H9NO2 and a molecular weight of 163.17300 g/mol. Key properties include a melting point of 57-60ºC, a boiling point of 369.5ºC at 760mmHg, a density of 1.209g/cm3 and a flash point of 177.3ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 21744-84-3
- Jingsj CID
- J-18057-4
- Molecular Formula
- C9H9NO2
- Molecular Weight
- 163.17300 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 57-60ºC |
|---|---|
| Boiling Point | 369.5ºC at 760mmHg |
| Density | 1.209g/cm3 |
| Flash Point | 177.3ºC |
| Exact Mass | 163.06300 |
| PSA | 29.54000 |
| LogP | 1.10680 |
| Vapor Pressure | 1.18E-05mmHg at 25°C |
| Refractive Index | 1.563 |
Customs & Trade Information
| HS Code | 2934999090 |
|---|---|
| Summary | 2934999090. other heterocyclic compounds. 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-Methyl-2H-1,4-benzoxazin-3(4H)-one?
The CAS number of 4-Methyl-2H-1,4-benzoxazin-3(4H)-one is 21744-84-3.
What are the molecular formula and molecular weight of 4-Methyl-2H-1,4-benzoxazin-3(4H)-one?
4-Methyl-2H-1,4-benzoxazin-3(4H)-one has molecular formula C9H9NO2 and molecular weight 163.17300 g/mol.
What are the upstream and downstream products of 4-Methyl-2H-1,4-benzoxazin-3(4H)-one?
For 4-Methyl-2H-1,4-benzoxazin-3(4H)-one, Upstream Products: 2H-1,4-benzoxazin-3(4H)-one, iodomethane, Chloroacetyl chloride; Downstream Products: 6-bromo-4-methyl-2H-benzo[b][1,4]oxazin-3(4H)-one, 2-(Methylamino)phenol, 4-Methyl-2,3-dihydro-1,4-benzoxazine.
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-Methyl-2H-1,4-benzoxazin-3(4H)-one (CAS 21744-84-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-18057-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.