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9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid

Also known as: Oxygen-fluorine acid, OXYGEN-FLUORINE ACID, 9,10-DIFLUORO-2,3-DIHYDRO-3-METHYL-7-OXO-7H-PYRIDO[1,2,3-DE]-1,4-BENZ-OXAZINE-6-CARBOXYLIC ACID, 9,10-DIFLUORO-3-METHYL-7-OXO-2,3-DIHYDRO-7H-[1,4]OXAZINO[2,3,4-IJ]QUINOLINE-6-CARBOXYLIC ACID, 9,10-Difluoro-2,3-Dihydro-3-Methyl-7-Oxo-7h-Pyroido(1,2,3-De)(1,4)Benzoxazine-6-Carboxylic Acid, 9,10-Difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid, 9,10-Difluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid, 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7h-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxyllic acid, 7H-1,4-Oxazino[2,3,4-ij]quinoline-6-carboxylic acid, 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-, AKOS BBS-00001807, AURORA 21894, MFCD00226106, OTAVA-BB BB0111050010, UNII:501W86694Z

9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid (CAS 82419-35-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C13H9F2NO4 and a molecular weight of 281.212 g/mol. Key properties include a melting point of 320-322ºC(lit.), a boiling point of 459.2±45.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 231.5±28.7 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
82419-35-0
Jingsj CID
J-1355390-7
Molecular Formula
C13H9F2NO4
Molecular Weight
281.212 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Melting Point320-322ºC(lit.)
Boiling Point459.2±45.0 °C at 760 mmHg
Density1.6±0.1 g/cm3
Flash Point231.5±28.7 °C
Exact Mass281.049957
PSA68.53000
LogP0.99
Vapor Pressure0.0±1.2 mmHg at 25°C
Refractive Index1.636

GHS Safety & Compliance

IrritantSignal word: Warning
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Customs & Trade Information

HS Code2934999090
Summary2934999090. 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 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid?

The CAS number of 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid is 82419-35-0.

What are the molecular formula and molecular weight of 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid?

9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid has molecular formula C13H9F2NO4 and molecular weight 281.212 g/mol.

Is 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid hazardous?

9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

What are the upstream and downstream products of 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid?

For 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid, Upstream Products: Tetrabutylammonium fluoride, 6-Amino-2,3-difluorophenol, tert-Butyl N-(3,4-difluorophenyl)carbamate; Downstream Products: Ofloxacin, 9-Fluoro-2,3-dihydro-3-methyl-10-(piperazin-1-yl)-7-oxo-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylic acid.

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

Last updated:

How to cite: Jingsj. "9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid (CAS 82419-35-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1355390-7 (accessed 2026-11-09).

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