Description

Catalogue No.	Capacity (ml)
11304/ 01	50
11304/02	100
11304/03	250
11304/04	500
11304/05	1000
11304/06	2000

The MEDILAB Pear-Shaped Separating Funnel with Rotaflow Stopcock is a precision liquid-liquid extraction vessel designed for reliable phase separation of immiscible liquids in chemical, pharmaceutical, environmental, and academic laboratories. Its globe/pear geometry provides fast and efficient settling, while the screw-type Rotaflow stopcock ensures smooth, leak-free drainage. Engineered for durability, chemical resistance, and operational safety, this funnel is essential in workflows involving solvent extraction, purification, and analytical sample preparation.

Key Features

• Pear/Globe-Shaped Design for improved phase clarity and faster separation.
• High-Precision Rotaflow Stopcock offering controlled drainage, smooth rotation, and excellent leak resistance.
• Manufactured from Borosilicate Glass 3.3, ensuring superior thermal and chemical durability.
• Complies with ISO 4800 Standards, ensuring global laboratory compatibility.
• Supplied with a PP Stopper, lightweight, chemically inert, and easy to clean.
• Thick, Even-Wall Construction for long operational life and high mechanical strength.
• Clear, Permanent Graduations for accurate, repeatable measurements.
• Corrosion-Resistant Components suitable for a wide range of organic and aqueous solvents.
• Leak-Proof Assembly with screw-type fittings for secure operation during shaking and mixing.

Material Specifications

• Material: High-grade Borosilicate Glass 3.3 (ISO 3585 compliant)

Thermal Properties:

• Low thermal expansion coefficient
• Excellent resistance to thermal shock
• Suitable for autoclaving and controlled heating

Chemical Resistance:

• Highly resistant to acids, alkalis, organic solvents, and corrosive vapours
• Non-porous surface prevents contamination and ensures sample integrity

Mechanical Properties:

• High strength and scratch resistance
• Maintains clarity and structural stability over long-term use

Standards:

• ISO 4800 (Separating Funnels)
• ISO 3585 (Material Standards for Borosilicate Glass)
• DIN/ASTM equivalent performance

Technical Specifications

• Available Capacities: 50 mL, 100 mL, 125 mL, 250 mL, 500 mL, 1000 mL, 2000 mL

Stopcock Type:

• Screw-type Rotaflow stopcock
• Chemically resistant, smooth-action key

Stopper:

• Polypropylene (PP) stopper included
• An optional glass stopper is available on request

Graduations: Durable, easy-to-read markings for precise volume reference

Tolerance & Accuracy: Manufactured with controlled calibration tolerances as per international glassware standards

Packaging:

• Individually packed in protective sleeves
• Export-grade corrugated cartons
• Foam-lined, impact-resistant packaging for safe global transport

Accessories Included:

• PP stopper
• Rotaflow stopcock (assembled)

 Handling & Precautions

Safe Use:

• Ensure the stopper and stopcock are firmly secured before shaking
• Hold the stopper during mixing to prevent accidental opening

Cleaning:

• Rinse immediately after use to prevent residue buildup
• Compatible with standard laboratory glassware detergents
• Avoid abrasive cleaning materials

Autoclaving / Temperature Limits:

• Autoclavable at standard sterilisation cycles
• Remove the PP stopper before autoclaving
• Avoid sudden temperature shocks to prevent stress fractures

Do’s:

• Lubricate the Rotaflow stopcock when required
• Inspect for chips or cracks before each use
• Store vertically to protect the stem

Don’ts:

• Do not overtighten the screw stopcock
• Do not subject the funnel to open flame or extreme heating

Best Practices:

• Air-dry thoroughly before storage
• Maintain regular stopcock cleaning to ensure smooth operation

Applications

• Organic Chemistry & Solvent Extraction
• Pharmaceutical and Biopharmaceutical Labs
• Environmental Analysis: Water, soil, and effluent extraction
• Quality Control / Quality Assurance Testing
• Chemical Synthesis & Purification Procedures
• Academic Laboratory Training and Demonstrations
• Biotechnology Sample Preparation

This funnel supports reliable separation of immiscible liquids, washing steps, and purification stages essential across R&D, industry, and analytical environments.

Why Choose MEDILAB

• Over 35 Years of Expertise in manufacturing high-quality laboratory glassware.
• Global Reach in 40+ Countries, trusted by institutions and distributors worldwide.
• Export-Quality Production with stringent inspection and quality assurance controls.
• OEM and Private Label Options available for large-volume buyers.
• Consistent Performance & Durability across every batch.
• Strong Protective Packaging designed for safe international shipping.
• Reliable Supply Chain supporting research labs, universities, manufacturers, and distributors globally.