Description

Oseltamivir Citrate CAS NO 209965-30-0 is the citrate salt of oseltamivir, a potent and selective inhibitor of influenza virus neuraminidase. This active pharmaceutical ingredient (API) is the critical component in antiviral medications used for the treatment and prophylaxis of influenza A and B virus infections. It is essential for pharmaceutical manufacturers developing and producing antiviral drugs, particularly for global pandemic preparedness and seasonal flu treatment.

Application

• Pharmaceutical API: Primary use as the active ingredient in antiviral capsule and oral suspension formulations.
• Influenza Treatment: Manufacture of medications for the treatment of uncomplicated acute illness due to influenza infection in patients aged 2 weeks and older.
• Influenza Prophylaxis: Production of drugs for the prevention of influenza in patients 1 year and older following contact with an infected individual.
• Pandemic Stockpiling: Sourcing for government and institutional stockpiles as a first-line defense against seasonal and pandemic influenza outbreaks.
• Generic Drug Manufacturing: Key raw material for producers of generic oseltamivir-based antiviral products.
• Clinical Research: Used in R&D for developing new antiviral therapies and combination treatments.

Basic Information

Product Name	Oseltamivir Citrate
CAS No.	209965-30-0
Molecular Formula	C16H28N2O4 • C6H8O7
Molecular Weight	496.52 g/mol (Salt)
Synonyms	Oseltamivir Phosphate Ester Citrate Salt; GS 4104; (3R,4R,5S)-4-Acetamido-5-amino-3-(1-ethylpropoxy)-1-cyclohexene-1-carboxylic Acid Ethyl Ester Citrate; Tamiflu (Brand Name) API; Ethyl (3R,4R,5S)-4-acetamido-5-amino-3-pentan-3-yloxycyclohex-1-ene-1-carboxylate; 2-hydroxypropane-1,2,3-tricarboxylate; Influenza Neuraminidase Inhibitor Citrate.
EINECS	Contact for details

Quality Control

Our Oseltamivir Citrate is manufactured under strict quality systems. We offer material compliant with major pharmacopoeial standards, including USP and EP monographs. Each batch undergoes comprehensive analytical testing, including identification, assay, impurity profiling, and residual solvent analysis. A Certificate of Analysis (COA) detailing all test results against specifications is provided with every shipment to ensure full traceability and regulatory compliance for our pharmaceutical partners.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive); the container must be kept tightly sealed in a low-humidity environment to prevent degradation. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference standard
Identification (HPLC)	Retention time matches reference
Assay (HPLC)	98.0% - 102.0% (on anhydrous basis)
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%
Related Substances (HPLC)	Individual impurity: ≤ 0.5% Total impurities: ≤ 1.5%
Heavy Metals	≤ 20 ppm
Microbial Limits	Conforms to EP/USP requirements

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