Description

Gemifloxacinmesylate CAS NO 204519-65-3 is the mesylate salt form of gemifloxacin, a broad-spectrum fluoroquinolone antibiotic. This high-purity pharmaceutical intermediate is critical for ensuring the efficacy and safety of the final active pharmaceutical ingredient (API). It is primarily required by manufacturers in the pharmaceutical industry for the synthesis of antibiotic formulations.

Application

• Pharmaceutical Intermediate: Key starting material for the synthesis of Gemifloxacin API.
• Antibiotic Drug Manufacturing: Used in the production of finished dosage forms for treating bacterial infections.
• Research & Development: Serves as a reference standard and building block in antimicrobial research programs.
• Contract Manufacturing: Supplied to CDMOs (Contract Development and Manufacturing Organizations) for cGMP production.
• Analytical Standard: Utilized as a high-purity standard for HPLC, LC-MS, and other quality control assays.

Basic Information

Product Name	Gemifloxacinmesylate
CAS No.	204519-65-3
Molecular Formula	C18H20FN5O4 • CH4O3S
Molecular Weight	485.49 g/mol
Synonyms	Gemifloxacin Mesylate; Gemifloxacin methanesulfonate; 7-[(4Z)-3-(Aminomethyl)-4-(methoxyimino)-1-pyrrolidinyl]-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid methanesulfonate; LB20304a; Factive Mesylate (associated with brand); (Z)-7-(3-Aminomethyl-4-methoxyimino-1-pyrrolidinyl)-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid methanesulfonate
EINECS	Contact for details

Quality Control

Our Gemifloxacinmesylate is manufactured under strict quality systems suitable for pharmaceutical applications. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency, meeting high-grade standards. A comprehensive Certificate of Analysis (COA) detailing specifications such as assay, related substances, residual solvents, and microbiological data is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time conforms to reference standard
Assay (HPLC)	98.0% - 102.0% (on anhydrous basis)
Water Content (KF)	≤ 1.0%
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%
Residual Solvents (GC)	Complies with ICH Q3C guidelines
Heavy Metals	≤ 20 ppm
Microbiological Enumeration	Complies with Ph. Eur. / USP guidelines

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.