WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 318382

CAS#: 82419-36-1 (free base)

Description: Ofloxacin is a synthetic antibiotic of the fluoroquinolone drug class considered to be a second-generation fluoroquinolone.

Chemical Structure

CAS# 82419-36-1 (free base)

Theoretical Analysis

MedKoo Cat#: 318382
Name: Ofloxacin
CAS#: 82419-36-1 (free base)
Chemical Formula: C18H20FN3O4
Exact Mass: 361.1438
Molecular Weight: 361.3675
Elemental Analysis: C, 59.83; H, 5.58; F, 5.26; N, 11.63; O, 17.71

Price and Availability

Size Price Availability Quantity
1.0g USD 190.0 2 Weeks
2.0g USD 350.0 2 Weeks
5.0g USD 550.0 2 Weeks
10.0g USD 950.0 2 Weeks
20.0g USD 1450.0 2 Weeks
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Related CAS #: 118120-51-7 (HCl)   82419-36-1 (free base)  

Synonym: Ofloxacin, DL-8280, DR-3355, Hoe-280, ORF-28489, Ru-43280,DL8280, DR3355, Hoe280, ORF28489, Ru43280, DL 8280, DR 3355, Hoe 280, ORF 28489, Ru 43280

IUPAC/Chemical Name: 9-fluoro-3-methyl-10-(4-methylpiperazin-1-yl)-7-oxo-3,7-dihydro-2H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid


InChi Code: InChI=1S/C18H20FN3O4/c1-10-9-26-17-14-11(16(23)12(18(24)25)8-22(10)14)7-13(19)15(17)21-5-3-20(2)4-6-21/h7-8,10H,3-6,9H2,1-2H3,(H,24,25)


Appearance: Off-white to light yellow crystalline powder.

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO, not in water

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 361.3675 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

Molarity Calculator

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*When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and SDS / CoA (available online).

Reconstitution Calculator

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Dilution Calculator

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1: Lahouidak S, Soriano ML, Salghi R, Zougagh M, Ríos Á. Graphene quantum dots for enhancement of fluorimetric detection coupled to capillary electrophoresis for detection of ofloxacin. Electrophoresis. 2019 May 22. doi: 10.1002/elps.201900037. [Epub ahead of print] PubMed PMID: 31116440.

2: Li J, Zhao L, Wei C, Sun Z, Zhao S, Cai T, Gong B. Preparation of restricted access media-molecularly imprinted polymers for efficient separation and enrichment ofloxacin in bovine serum samples. J Sep Sci. 2019 May 20. doi: 10.1002/jssc.201900103. [Epub ahead of print] PubMed PMID: 31106511.

3: Yang X, Xu X, Wei X, Wan J, Zhang Y. Biomarker Effects in Carassius auratus Exposure to Ofloxacin, Sulfamethoxazole and Ibuprofen. Int J Environ Res Public Health. 2019 May 9;16(9). pii: E1628. doi: 10.3390/ijerph16091628. PubMed PMID: 31075982.

4: Eid HM, Elkomy MH, El Menshawe SF, Salem HF. Development, Optimization, and In Vitro/In Vivo Characterization of Enhanced Lipid Nanoparticles for Ocular Delivery of Ofloxacin: the Influence of Pegylation and Chitosan Coating. AAPS PharmSciTech. 2019 May 3;20(5):183. doi: 10.1208/s12249-019-1371-6. PubMed PMID: 31054011.

5: Singh V, Pandey B, Suthar S. Phytotoxicity and degradation of antibiotic ofloxacin in duckweed (Spirodela polyrhiza) system. Ecotoxicol Environ Saf. 2019 Sep 15;179:88-95. doi: 10.1016/j.ecoenv.2019.04.018. Epub 2019 Apr 23. PubMed PMID: 31026754.

6: Wang H, Han M, Zhou Y, Li J, Xiao X, Zhang W. Effects of Thermal Treatment on Porous Cerium Titanate Photocatalyst for Ofloxacin Degradation. J Nanosci Nanotechnol. 2019 Aug 1;19(8):5264-5270. doi: 10.1166/jnn.2019.16812. PubMed PMID: 30913843.

7: Wang C, Dong D, Zhang L, Song Z, Hua X, Guo Z. Response of Freshwater Biofilms to Antibiotic Florfenicol and Ofloxacin Stress: Role of Extracellular Polymeric Substances. Int J Environ Res Public Health. 2019 Feb 27;16(5). pii: E715. doi: 10.3390/ijerph16050715. PubMed PMID: 30818877; PubMed Central PMCID: PMC6427337.

8: Santos AM, Wong A, Vicentini FC, Fatibello-Filho O. Simultaneous voltammetric sensing of levodopa, piroxicam, ofloxacin and methocarbamol using a carbon paste electrode modified with graphite oxide and β-cyclodextrin. Mikrochim Acta. 2019 Feb 15;186(3):174. doi: 10.1007/s00604-019-3296-x. PubMed PMID: 30771008.

9: Marslin G, Revina AM, Kumar Megraj Khandelwal V, Balakumar K, Sheeba CJ, Franklin G. Corrigendum to "PEGylated ofloxacin nanoparticles render strong antibacterial activity against many clinically important human pathogens" [Colloids Surf. B: Biointerfaces 132 (2015) 62-70]. Colloids Surf B Biointerfaces. 2019 May 1;177:282-283. doi: 10.1016/j.colsurfb.2019.01.063. Epub 2019 Feb 12. PubMed PMID: 30769229.

10: Vakh C, Alaboud M, Lebedinets S, Bulatov A. A rotating cotton-based disk packed with a cation-exchange resin: Separation of ofloxacin from biological fluids followed by chemiluminescence determination. Talanta. 2019 May 1;196:117-123. doi: 10.1016/j.talanta.2018.12.024. Epub 2018 Dec 13. PubMed PMID: 30683340.

11: Gao B, Li P, Yang R, Li A, Yang H. Investigation of multiple adsorption mechanisms for efficient removal of ofloxacin from water using lignin-based adsorbents. Sci Rep. 2019 Jan 24;9(1):637. doi: 10.1038/s41598-018-37206-1. PubMed PMID: 30679691; PubMed Central PMCID: PMC6346052.

12: Chen P, Blaney L, Cagnetta G, Huang J, Wang B, Wang Y, Deng S, Yu G. Degradation of Ofloxacin by Perylene Diimide Supramolecular Nanofiber Sunlight-Driven Photocatalysis. Environ Sci Technol. 2019 Feb 5;53(3):1564-1575. doi: 10.1021/acs.est.8b05827. Epub 2019 Jan 11. PubMed PMID: 30604606.

13: Polachek H, Debotton N, Feinshtein V, Rubin M, Ben-Zvi Z, Holcberg G, Agbaria R, Dahan A. The role of various transporters in the placental uptake of ofloxacin in an in vitro model of human villous trophoblasts. Drug Des Devel Ther. 2018 Dec 4;12:4129-4138. doi: 10.2147/DDDT.S181493. eCollection 2018. PubMed PMID: 30584277; PubMed Central PMCID: PMC6284538.

14: Nuti S, Fernández-Lodeiro J, Del Secco B, Rampazzo E, Rodríguez-González B, Capelo JL, Silva V, Igrejas G, Poeta P, Torres C, Zaccheroni N, Prodi L, Oliveira E, Lodeiro C. Engineered Nanostructured Materials for Ofloxacin Delivery. Front Chem. 2018 Nov 27;6:554. doi: 10.3389/fchem.2018.00554. eCollection 2018. PubMed PMID: 30538980; PubMed Central PMCID: PMC6277636.

15: Tong X, Wang X, He X, Xu K, Mao F. Effects of ofloxacin on nitrogen removal and microbial community structure in constructed wetland. Sci Total Environ. 2019 Mar 15;656:503-511. doi: 10.1016/j.scitotenv.2018.11.358. Epub 2018 Nov 27. PubMed PMID: 30522033.

16: Xiao X, Wu J, Li Z, Jia L. Enantioseparation and sensitive analysis of ofloxacin by poly(3,4-dihydroxyphenylalanine) functionalized magnetic nanoparticles-based solid phase extraction in combination with on-line concentration capillary electrophoresis. J Chromatogr A. 2019 Feb 22;1587:14-23. doi: 10.1016/j.chroma.2018.11.026. Epub 2018 Nov 16. PubMed PMID: 30473108.

17: Yu Y, Huang F, He Y, Liu X, Song C, Xu Y, Zhang Y. Heterogeneous fenton-like degradation of ofloxacin over sludge derived carbon as catalysts: Mechanism and performance. Sci Total Environ. 2019 Mar 1;654:942-947. doi: 10.1016/j.scitotenv.2018.11.156. Epub 2018 Nov 12. PubMed PMID: 30453264.

18: Sirous M, Khosravi AD, Tabandeh MR, Salmanzadeh S, Ahmadkhosravi N, Amini S. Molecular detection of rifampin, isoniazid, and ofloxacin resistance in Iranian isolates of Mycobacterium tuberculosis by high-resolution melting analysis. Infect Drug Resist. 2018 Oct 18;11:1819-1829. doi: 10.2147/IDR.S178831. eCollection 2018. PubMed PMID: 30425535; PubMed Central PMCID: PMC6202043.

19: Ouni B, Fathallah N, Slim R, Brahim A, Ben Salem C. Anaphylactic shock secondary to oral ofloxacin administration with cross-reactivity to levofloxacin and ciprofloxacin. Therapie. 2018 Dec;73(6):555-556. doi: 10.1016/j.therap.2018.05.001. Epub 2018 Jun 20. PubMed PMID: 30401472.

20: Zhong X, Qin X, Du P, Chen J, Zhang Y, He Y, Liu F. [Simultaneous determination of ofloxacin enantiomers in water by high performance liquid chromatography]. Se Pu. 2018 Nov 1;36(11):1167-1172. doi: 10.3724/SP.J.1123.2018.07018. Chinese. PubMed PMID: 30378380.