Separating Funnel, Pear Shape, Glass Stopcock

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GISCOM Separating Funnel, Pear Shape, with Glass Stopcock is a precision-engineered laboratory vessel used for liquid–liquid extractions, phase separation, and purification of immiscible solutions. Its rounded pear-shaped geometry promotes efficient settling and clean partitioning between organic and aqueous layers. Designed for reliability, safety, and high chemical resistance, this funnel is indispensable across research laboratories, pharmaceutical development, analytical chemistry, QC/QA testing, and academic institutions. Its durable construction and smooth stopcock operation ensure consistent performance in daily laboratory workflows.

Key Features

• Premium Borosilicate Glass 3.3: Excellent thermal and chemical resistance for routine and demanding applications.
• Pear/Globe-Shaped Design: Enhances phase separation efficiency by minimising turbulence and improving liquid interface clarity.
• High-Precision Glass Stopcock: Ensures smooth drainage control, superior sealing, and long-term corrosion resistance.
• PE Stopper Included: The Lightweight, chemically inert stopper ensures secure closure during mixing and shaking.
• ISO 4800 Compliant: Manufactured according to international laboratory glassware standards.
• Clear Graduations: Durable, easy-to-read markings for accurate volume measurement.
• Leak-Proof Assembly: Precision-ground joints ensure tight, reliable sealing during extractions.
• Long Operational Life: Resistant to scratches, staining, and chemical degradation.

Material Specifications

• Material: Borosilicate Glass 3.3 (ISO 3585 compliant)
• Thermal Properties: Low thermal expansion coefficient Excellent resistance to thermal shock
• Suitable for heating, cooling, and autoclaving
• Chemical Resistance: Highly resistant to acids, alkalis, solvents, and laboratory reagents. Non-porous surface prevents contamination and ensures high sample purity
• Mechanical Strength: High hardness and durability for routine laboratory handling
• Standards: Equivalent  glassware performance standards

 Technical Specifications

• Available Capacities: As per the standard size table
• Design: Pear/Globe shape promoting optimised phase separation
• Stopcock Type: Precision glass key stopcock, grease-compatible for smooth rotation
• Stoppers: Polyethene (PE) stopper included (glass stopper optional)
• Tolerance & Accuracy: High-accuracy graduation marks produced with controlled calibration tolerances
• Accessories Included: Glass stopcock (pre-installed), PE stopper

Handling & Precautions

• Safe Use: Ensure the stopper and stopcock are securely fitted before shaking. Hold the stopper firmly during mixing to prevent spills
• Cleaning Instructions: Rinse immediately after use. Use mild laboratory detergents; avoid abrasive tools. Compatible with most glassware washing systems
• Autoclaving & Heating: Autoclavable at standard sterilisation temperatures. Remove the PE stopper before autoclaving. Avoid sudden temperature changes to prevent thermal stress
• Dos: Lubricate the glass stopcock periodically. Handle with both hands, especially in larger sizes
• Don’ts: Do not use the funnel if cracks, chips, or stopcock stiffness are observed. Do not expose to open flame or direct extreme heat
• Best Practices: Store vertically to protect the stem. Air-dry thoroughly before storing to prevent microbial growth

Applications

• Chemical & Pharmaceutical Research: Solvent extractions, washing steps, compound purification.
• Biotechnology & Life Sciences: Isolation of biomolecules and organic extracts.
• Environmental Testing Laboratories: Extraction of pollutants from water, soil, and effluent samples.
• Quality Control / Quality Assurance: Phase separation is required for various analytical protocols.
• Academic & Teaching Laboratories: Ideal for organic chemistry practicals and demonstration experiments.
• Food & Beverage Testing: Extraction of analytes for safety and regulatory compliance.

The funnel serves as a core laboratory component wherever immiscible phase separation is required.