Labglass Conical Flask – 250ml, Narrow Neck (Borosilicate 3.3, ISO 1773)

This durable 250ml Labglass Conical Flask (Erlenmeyer type) features a narrow neck and is manufactured from premium borosilicate 3.3 glass. Highly resistant to heat, chemicals, and thermal shock, it is designed for reliable everyday use in school and professional laboratories. The flask conforms to ISO 1773 standards, ensuring consistent dimensions and high‑quality performance.

Ideal for heating, mixing, swirling, titration work, and solution preparation, this conical flask is an essential tool for a wide range of science experiments.

Key Features

• 250ml narrow‑neck Erlenmeyer flask
• Made from borosilicate 3.3 glass for superior heat and chemical resistance
• Conforms to ISO 1773 standards
• Ideal for mixing, heating, swirling, and storing liquids
• Durable, reusable, and suitable for repeated heating/cooling cycles
• Smooth, clear glass for easy observation of contents

Compatible Rubber Stoppers

• 2742 – Solid Rubber Stopper, 27mm
• 2743 – 1‑Hole Rubber Stopper, 27mm
• 2744 – 2‑Hole Rubber Stopper, 27mm

Ideal for School Science Lessons

Well‑suited for KS3, GCSE, and A‑Level science, this 250ml conical flask supports a broad range of classroom experiments, including:

• Titration experiments and acid‑base investigations
• Mixing and swirling chemical solutions safely
• Heating liquids over a Bunsen burner or hot plate
• Microbial culture work in biology (with appropriate stoppers)
• General solution preparation and storage

Robust, reliable, and classroom‑ready, the Labglass 250ml Narrow‑Neck Conical Flask is an essential piece of equipment for any well‑equipped school laboratory.