Academy Conical Flask – Narrow Neck 250ml (Borosilicate Glass, ISO 1773)

This high‑quality Academy 250ml Narrow Neck Conical Flask (Erlenmeyer Flask) is manufactured from durable 3.3 borosilicate glass, offering exceptional chemical resistance, thermal stability, and long‑lasting performance in laboratory and educational environments. The flask includes clear printed graduations for accurate measurement and monitoring during practical work.

Compliant with the ISO 1773 standard, this conical flask ensures reliable, consistent quality for everyday laboratory use. Its 32mm internal narrow neck helps minimise evaporation and reduces splashing when swirling or mixing solutions. This flask is compatible with several 31mm rubber stoppers, including solid, 1‑hole, and 2‑hole types, making it suitable for a wide range of experimental setups.

Key Features

• Manufactured from durable 3.3 borosilicate glass
• Conical (Erlenmeyer) design with narrow neck
• Clear graduations for accurate measuring
• Complies with ISO 1773 laboratory standards
• Capacity: 250ml
• Inner neck diameter: 32mm
• Compatible stoppers:
• 1159 – Solid 31mm
• 1163 – 1‑Hole 31mm
• 1494 – 2‑Hole 31mm

Ideal for School Science Lessons

Perfect for KS3, GCSE, and A‑Level lessons, this 250ml conical flask is widely used across chemistry, biology, and physics practicals. Common applications include:

• Mixing, swirling, and heating solutions safely and efficiently
• Carrying out titrations, reaction experiments, and dilution processes
• Demonstrating principles such as aeration, crystallisation, and gas collection
• Using with stoppers for closed‑system experiments or storage
• Supporting technicians with routine prep‑room tasks

Reliable, durable, and student‑friendly, the Academy 250ml Narrow Neck Conical Flask is an essential item for any school science laboratory.