Separating Funnel with PTFE Key – 250ml (19/26 Joint, Borosilicate Glass)

This high‑quality 250ml Separating Funnel is manufactured from durable 3.3 borosilicate glass, offering excellent chemical resistance, heat tolerance, and long‑lasting reliability in both educational and professional laboratory environments. Designed in accordance with ISO 4800 standards, it ensures dependable performance during liquid–liquid separation procedures.

The funnel is equipped with a smooth‑running PTFE key stopcock, providing superior chemical resistance and leak‑free operation. A secure polypropylene (PP) stopper is included to prevent evaporation, spillage, and contamination during mixing or settling. This model features a standard 19/26 interchangeable joint for compatibility with a wide range of laboratory equipment.

Key Features

• Made from premium 3.3 borosilicate glass
• PTFE key stopcock for smooth, chemical‑resistant operation
• Includes a secure PP stopper
• Class‑compliant with ISO 4800 standards
• Capacity: 250ml
• Joint size: 19/26
• Ideal for liquid–liquid extraction and separation

Ideal for School Science Lessons

Well‑suited for GCSE and A‑Level chemistry, this separating funnel is an essential tool for demonstrating and teaching separation techniques. Common classroom uses include:

• Liquid–liquid extraction during organic chemistry experiments
• Demonstrating the separation of immiscible liquids
• Teaching principles of density, polarity, and solubility
• Preparing purified organic layers for further analysis
• Allowing students to observe phase formation and settling

Durable, precise, and easy to use, this 250ml Separating Funnel with PTFE Key is a valuable addition to any school laboratory or technician prep room.