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

Also known as: 2H-1,4-benzoxazine-3(4H)-one, 2H-benzo[b][1,4]oxazin-3(4H)-one, 4H-1,4-benzoxazin-3-one, 4H-benzo[1,4]oxazin-3-one, benzo[b]morpholin-3-one, 4-aza-3-chromanone, 1,4-benzoxazine-3-one, 3-oxo-4H-benzo[1,4]oxazine, 2,4-dihydro-3H-1,4-benzoxazine-3-one, MFCD00158536, AURORA KA-5421, OTAVA-BB BB7020041238

2H-1,4-benzoxazin-3(4H)-one (CAS 5466-88-6) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C8H7NO2 and a molecular weight of 149.147 g/mol. Key properties include a melting point of 173-175 °C(lit.), a boiling point of 337.7±31.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 158.1±24.8 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 5466-88-6
Jingsj CID: J-7361-0
Molecular Formula: C₈H₇NO₂
Molecular Weight: 149.147 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	173-175 °C(lit.)
Boiling Point	337.7±31.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	158.1±24.8 °C
Exact Mass	149.047684
PSA	38.33000
LogP	0.48
Vapor Pressure	0.0±0.7 mmHg 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 2H-1,4-benzoxazin-3(4H)-one?

The CAS number of 2H-1,4-benzoxazin-3(4H)-one is 5466-88-6.

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

2H-1,4-benzoxazin-3(4H)-one has molecular formula C8H7NO2 and molecular weight 149.147 g/mol.

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

For 2H-1,4-benzoxazin-3(4H)-one, Upstream Products: Chloroacetyl chloride, 2-Aminophenol, Ethyl bromoacetate; Downstream Products: 3-oxo-3,4-dihydro-2H-1,4-benzoxazine-6-sulfonyl chloride, 3-Methyl-3,4-dihydro-2H-1,4-benzoxazine, 7-Bromo-2H-benzo[b][1,4]oxazin-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. "2H-1,4-benzoxazin-3(4H)-one (CAS 5466-88-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-7361-0 (accessed 2026-11-09).

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