DURAN 217413609 Wide-Neck Beaded Rim 250 mL

DURAN 217413609 Round Bottom Flask Wide-Neck Beaded Rim 250 mL

The DURAN 217413609 is a 250 mL wide-neck round-bottom flask manufactured from DURAN® borosilicate glass 3.3, offering outstanding thermal resistance, chemical durability, and mechanical strength. Its round-bottom design with uniform wall thickness ensures even heat distribution, making it highly reliable for laboratory boiling, reflux, distillation, and other heating applications.

The wide-neck opening (~51 mm OD) provides easy access for filling, pouring, and cleaning, while the beaded rim reinforces the neck, reducing the risk of chipping and improving handling safety. Designed for long service life, this flask is fully autoclavable (~121 °C) and supplied in packs of 10 units, making it suitable for research, teaching, and industrial laboratories.

Features

• Durable Borosilicate Glass 3.3: Excellent resistance to chemicals and thermal shock.

• Round-Bottom Geometry: Promotes uniform heating and reduces hot spots.

• Wide-Neck Opening (~51 mm OD): Allows easier reagent addition, pouring, and cleaning.

• Beaded Rim Reinforcement: Increases strength and minimizes damage at the neck.

• Uniform Wall Thickness: Enhances heating performance and thermal stability.

• Autoclavable (~121 °C): Safe for sterilization and repeated laboratory use.

• Packaged in Bulk: Supplied in sets of 10 for efficient laboratory stocking.

Key Specifications

• Catalogue Number: 217413609

• Nominal Capacity: 250 mL

• Material: DURAN® Borosilicate Glass 3.3

• Neck Type: Wide neck with beaded rim (~51 mm OD)

• Body Diameter: ~85 mm

• Height: ~143 mm

• Shape: Round bottom

• Rim: Beaded rim for enhanced durability

• Standards: DIN ISO 24450 (wide-neck round-bottom flasks)

• Autoclavable: Yes (~121 °C)

• Packaging: Pack of 10 units

Applications

• General Heating & Boiling: Ideal for ~250 mL sample volumes in heating mantles or baths.

• Reflux & Distillation: Suitable for uniform thermal processes in chemical synthesis.

• Synthetic Chemistry: Practical for small-batch reactions and solution preparation.

• Teaching & Research: Widely used in university labs and R&D environments.

• Easy Handling & Cleaning: Wide neck simplifies solid or liquid transfers and cleaning tasks.