![Molecular structure of 7-Nitro-2H-benzo[b][1,4]oxazin-3(4H)-one (CAS 81721-86-0)](/images/chem_structures_svg/025/81721-86-0.svg)
7-Nitro-2H-benzo[b][1,4]oxazin-3(4H)-one
Also known as: 7-Nitro-2H-1,4-benzoxazin-3(4H)-one, 7-nitro-4H-1,4-benzoxazin-3-one, 7-Nitro-3,4-dihydro-2H-1,4-benzoxazin-3-one
7-Nitro-2H-benzo[b][1,4]oxazin-3(4H)-one (CAS 81721-86-0) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C8H6N2O4 and a molecular weight of 194.14400 g/mol. Key properties include a melting point of 232-234ºC, a boiling point of 429.4ºC at 760 mmHg, a density of 1.474g/cm3 and a flash point of 213.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 81721-86-0
- Jingsj CID
- J-1554030-4
- Molecular Formula
- C8H6N2O4
- Molecular Weight
- 194.14400 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 232-234ºC |
|---|---|
| Boiling Point | 429.4ºC at 760 mmHg |
| Density | 1.474g/cm3 |
| Flash Point | 213.5ºC |
| Exact Mass | 194.03300 |
| PSA | 84.15000 |
| LogP | 1.58690 |
| Refractive Index | 1.606 |
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 7-Nitro-2H-benzo[b][1,4]oxazin-3(4H)-one?
The CAS number of 7-Nitro-2H-benzo[b][1,4]oxazin-3(4H)-one is 81721-86-0.
What are the molecular formula and molecular weight of 7-Nitro-2H-benzo[b][1,4]oxazin-3(4H)-one?
7-Nitro-2H-benzo[b][1,4]oxazin-3(4H)-one has molecular formula C8H6N2O4 and molecular weight 194.14400 g/mol.
What are the upstream and downstream products of 7-Nitro-2H-benzo[b][1,4]oxazin-3(4H)-one?
For 7-Nitro-2H-benzo[b][1,4]oxazin-3(4H)-one, Upstream Products: Chloroacetyl chloride, 2-Amino-5-nitrophenol, Ethyl bromoacetate; Downstream Products: 4-Methyl-7-nitro-2H-benzo[b][1,4]oxazin-3(4H)-one, 4-Methyl-3,4-dihydro-2H-benzo[b][1,4]oxazin-7-amine, 7-Nitro-3,4-dihydro-2H-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. "7-Nitro-2H-benzo[b][1,4]oxazin-3(4H)-one (CAS 81721-86-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1554030-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.