Ofloxacin

Also known as: (+/-)-9-Fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid, Floxin, Tarivid, Oflox, OCUFLOX, Exocin, Flobacin, Floxal, Floxil, Hoe 280, DL-8280, Oxaldin, (±)-9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid, 9-fluoro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid, Ofloxacin, oflx

Ofloxacin (CAS 82419-36-1) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C18H20FN3O4 and a molecular weight of 361.367 g/mol. Key properties include a melting point of 270-2750C, a boiling point of 571.5±50.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 299.4±30.1 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 82419-36-1
Jingsj CID: J-44409-1
Molecular Formula: C₁₈H₂₀FN₃O₄
Molecular Weight: 361.367 g/mol
Category: Organohalogen Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	270-2750C
Boiling Point	571.5±50.0 °C at 760 mmHg
Density	1.5±0.1 g/cm3
Flash Point	299.4±30.1 °C
Exact Mass	361.143799
PSA	75.01000
LogP	0.84
Vapor Pressure	0.0±1.7 mmHg at 25°C
Refractive Index	1.670

Activity & Biological Data

Additional Information	[1]. Todd PA, et al. Ofloxacin. A reappraisal of its antimicrobial activity, pharmacology and therapeutic use. Drugs. 1991 Nov;42(5):825-76. [2]. Smith JT, et al. Ofloxacin, a bactericidal antibacterial. Chemotherapy. 1991;37 Suppl 1:2-13. [3]. Olcay E, et al. Oral toxicity of pefloxacin, norfloxacin, ofloxacin and ciprofloxacin: comparison of biomechanical and histopathological effects on Achilles tendon in rats. J Toxicol Sci. 2011 Jun;36(3):339-45.

Additional Information

[1]. Todd PA, et al. Ofloxacin. A reappraisal of its antimicrobial activity, pharmacology and therapeutic use. Drugs. 1991 Nov;42(5):825-76. [2]. Smith JT, et al. Ofloxacin, a bactericidal antibacterial. Chemotherapy. 1991;37 Suppl 1:2-13. [3]. Olcay E, et al. Oral toxicity of pefloxacin, norfloxacin, ofloxacin and ciprofloxacin: comparison of biomechanical and histopathological effects on Achilles tendon in rats. J Toxicol Sci. 2011 Jun;36(3):339-45.

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 Ofloxacin?

The CAS number of Ofloxacin is 82419-36-1.

What are the molecular formula and molecular weight of Ofloxacin?

Ofloxacin has molecular formula C18H20FN3O4 and molecular weight 361.367 g/mol.

What are the upstream and downstream products of Ofloxacin?

For Ofloxacin, Upstream Products: 1-Methylpiperazine, 9,10-difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid, 2,2'-Biquinoline; Downstream Products: 1-Cyclopropyl-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, Levofloxacin, (R)-Ofloxacin.

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. "Ofloxacin (CAS 82419-36-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-44409-1 (accessed 2026-11-06).

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