5-Chloro-1H-benzo[d][1,3]oxazine-2,4-dione

Also known as: 6-Chloroisatoic anhydride, 5-Chloroisatoic anhydride, 5-Chloro-3,1-benzoxazine-2,4-dione, 5-Chloro-2H-3,1-benzoxazine-2,4(1H)-dione, 6-Chloroisatoic acid anhydride

5-Chloro-1H-benzo[d][1,3]oxazine-2,4-dione (CAS 20829-96-3) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C8H4ClNO3 and a molecular weight of 197.575 g/mol. Key properties include a melting point of 272.5-272.9°C and a density of 1.5±0.1 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 20829-96-3
Jingsj CID: J-1187740-0
Molecular Formula: C₈H₄ClNO₃
Molecular Weight: 197.575 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	272.5-272.9°C
Density	1.5±0.1 g/cm3
Exact Mass	196.987976
PSA	63.33000
LogP	1.50
Refractive Index	1.601
Storage Conditions	2-8°C

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 5-Chloro-1H-benzo[d][1,3]oxazine-2,4-dione?

The CAS number of 5-Chloro-1H-benzo[d][1,3]oxazine-2,4-dione is 20829-96-3.

What are the molecular formula and molecular weight of 5-Chloro-1H-benzo[d][1,3]oxazine-2,4-dione?

5-Chloro-1H-benzo[d][1,3]oxazine-2,4-dione has molecular formula C8H4ClNO3 and molecular weight 197.575 g/mol.

What are the upstream and downstream products of 5-Chloro-1H-benzo[d][1,3]oxazine-2,4-dione?

For 5-Chloro-1H-benzo[d][1,3]oxazine-2,4-dione, Upstream Products: 2-Amino-6-chlorobenzoic acid, Bis(trichloromethyl) carbonate, Acetyl chloride; Downstream Products: 7-Chloro-3,4-dihydro-1H-benzo[e][1,4]diazepine-2,5-dione, Methyl 2-amino-6-chlorobenzoate, ethyl 5-chloro-4-hydroxy-1-methyl-2-oxo-1,2-dihydroquinoline-3-carboxylate.

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. "5-Chloro-1H-benzo[d][1,3]oxazine-2,4-dione (CAS 20829-96-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1187740-0 (accessed 2026-11-09).

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