Flask, Pear Shape, Two Neck

The GISCOM Pear-Shaped Two-Neck Flask is a precision-engineered laboratory vessel designed for heating, mixing, distillation, and controlled chemical reactions. Its unique pear-shaped body promotes efficient mixing and minimizes sample loss, while the dual neck configuration allows simultaneous attachment of condensers, thermometers, adapters, or other lab apparatus. Made from high-quality Borosilicate Glass 3.3, this flask ensures excellent thermal resistance, chemical durability, and long operational life in demanding laboratory and industrial settings.

Key Features

• Two-Neck Design: Facilitates multi-step experimental setups, enabling parallel connections for reflux, temperature monitoring, and reagent addition.
• Pear-Shaped Body: Enhances evaporation efficiency and concentrates solutions effectively.
• High Thermal Stability: Withstands thermal shocks during heating and cooling cycles.
• Chemical Resistance: Suitable for a wide range of acids, solvents, and reagents.
• Precision Ground Joints: Leakproof assembly and compatibility with all standard joint glassware.
• Clear Visibility: Excellent transparency for monitoring reaction progress.
• Durable Construction: Manufactured using thick, uniform Borosilicate Glass 3.3 for long service life.
• Autoclavable & Reusable: Designed for repeated sterilisation and daily laboratory use.

 Material Specifications

• Material: Borosilicate Glass 3.3
• Thermal Properties: High resistance to thermal shock; low thermal expansion coefficient (approx. 3.3 × 10⁻⁶ /°C).
• Chemical Properties: Inert to most chemicals, solvents, and corrosive agents; non-porous and contamination-resistant.
• Mechanical Strength: High mechanical stability and durability for repeated handling.
• Compliance: Manufactured according to international laboratory glassware standards (ISO / DIN).

Technical Specifications

• Available Capacities: As per the standard size table
• Joint Options: Two standard ground joints (main neck + side neck) as per ISO/DIN specifications.
• Design: Pear-shaped body with a round bottom for uniform heating.
• Tolerance: High dimensional and volume accuracy suitable for analytical and preparative applications.
• Calibration: Supplied non-calibrated (calibration options available upon request).
• Accessories (Optional): Stoppers, adapters, and compatible joint accessories are available upon request.

 Handling & Precautions

• Safe Usage: Always support the flask properly when connecting multiple apparatus.
• Cleaning: Wash with mild laboratory detergent; avoid abrasive materials that may scratch the glass.
• Heating: Suitable for use on heating mantles, water/oil baths, or controlled flame sources.
• Autoclaving: Fully autoclavable at standard sterilisation temperatures.
• Dos: Use proper joint lubrication if required. Inspect joints and necks before use
• Don’ts: Do not subject the flask to sudden extreme temperature changes. Avoid using it with highly alkaline solutions at high temperatures
• Best Practices: Allow gradual heating/cooling and store in a cushioned rack to prolong glass life.

Applications

• Chemical Synthesis & Reactions – Ideal for refluxing, distillation, boiling, and controlled reactions.
• Pharmaceutical & Biotech Labs – Suitable for active ingredient development, purification, and formulation studies.
• Academic & Research Institutions – Used in organic chemistry, analytical chemistry, and laboratory teaching.
• Quality Control / Quality Assurance Labs – Supports routine analysis, solution preparation, and controlled heating tasks.
• Industrial R&D – Reliable for pilot-scale experiments and process development.