6-nitro-2H-1,4-benzoxazin-3(4H)-one

Also known as: 6-nitro-2H-benzo[b][1,4]oxazin-3(4H)-one, 6-nitro-3,4-dihydro-2H-1,4-benzoxazin-3-one, 6-nitro-4H-1,4-benzoxazin-3-one, 6-nitro-4H-benzo[1,4]oxazin-3-one, 6-nitro-2H-1,4-benzoxazin-3(4H)-on, 6-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE, 6-NITRO-4H-BENZO[1,4]OXAZIN-3-ONE, SALOR-INT L168017-1EA

6-nitro-2H-1,4-benzoxazin-3(4H)-one (CAS 81721-87-1) 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 236-240ºC, a boiling point of 424.3ºC at 760 mmHg, a density of 1.474g/cm3 and a flash point of 210.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 81721-87-1
Jingsj CID: J-973719-3
Molecular Formula: C₈H₆N₂O₄
Molecular Weight: 194.14400 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	236-240ºC
Boiling Point	424.3ºC at 760 mmHg
Density	1.474g/cm3
Flash Point	210.4ºC
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 6-nitro-2H-1,4-benzoxazin-3(4H)-one?

The CAS number of 6-nitro-2H-1,4-benzoxazin-3(4H)-one is 81721-87-1.

What are the molecular formula and molecular weight of 6-nitro-2H-1,4-benzoxazin-3(4H)-one?

6-nitro-2H-1,4-benzoxazin-3(4H)-one has molecular formula C8H6N2O4 and molecular weight 194.14400 g/mol.

What are the upstream and downstream products of 6-nitro-2H-1,4-benzoxazin-3(4H)-one?

For 6-nitro-2H-1,4-benzoxazin-3(4H)-one, Upstream Products: Chloroacetyl chloride, 2-Amino-4-nitrophenol, Bromoacetyl bromide; Downstream Products: 6-amino-4H-1,4-benzoxazin-3-one, 6-Nitro-3,4-dihydro-2H-1,4-benzoxazine, 6-amino-4-methyl-2H-1,4-benzoxazin-3(4H)-one.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "6-nitro-2H-1,4-benzoxazin-3(4H)-one (CAS 81721-87-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-973719-3 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.