DURAN 217113606 Flat Bottom Flask 250 mL 

DURAN 217113606 Flat Bottom Flask 250 mL

The DURAN 217113606 is a 250 mL flat-bottom laboratory flask designed for reliable heating, boiling, and reaction tasks. Made from DURAN® borosilicate glass 3.3 (Type I / neutral glass), it offers excellent thermal resistance, chemical durability, and long-lasting performance in laboratory environments.

Its flat base allows the flask to sit securely on laboratory benches or hot plates without requiring a support ring, while the narrow-neck opening (~34 mm OD) ensures controlled pouring and reduces evaporation during experiments. The beaded rim adds mechanical strength to the neck, making it more resistant to chipping during frequent handling. With uniform wall thickness, the flask provides even heating and minimizes hot spots, making it a dependable vessel for repeated heating and sterilization cycles.

Features

• Premium DURAN® Borosilicate Glass 3.3 – High chemical resistance and low thermal expansion.

• Flat-Bottom Design – Provides stability on flat surfaces and hot plates without additional support.

• Narrow Neck (~34 mm OD) – Allows controlled pouring and reduces evaporation.

• Beaded Rim Reinforcement – Enhances durability against chipping and mechanical stress.

• Uniform Wall Thickness – Supports even heat distribution and reduces thermal stress.

• Autoclavable (~121 °C) – Suitable for sterilization and reuse.

• Laboratory Pack – Commonly supplied in packs of 10 units for convenient stocking.

Key Specifications

• Catalogue Number: 217113606

• Nominal Capacity: 250 mL

• Material: DURAN® Borosilicate Glass 3.3 (Type I / neutral glass)

• Neck Type: Narrow neck, beaded rim (~34 mm OD)

• Body Diameter: ~85 mm

• Height: ~138 mm

• Bottom Type: Flat bottom

• Wall Thickness: Uniform for consistent heating

• Packaging: 10 units per pack (typical)

• Autoclavable: Yes (~121 °C)

Applications

• Small-Scale Heating & Boiling – Ideal for reactions and solution preparation at ~250 mL capacity.

• General Laboratory Work – Useful for chemistry, biology, and educational labs.

• Controlled Pouring – Narrow neck helps minimize evaporation and spillage.

• Repeated Sterilization – Suitable for labs requiring durable and autoclavable glassware.

• Teaching & Research – Trusted for training, student experiments, and R&D workflows.