DURAN 217411702 Flask Wide Neck 50 mL

DURAN 217411702 Round Bottom Boiling Flask Wide Neck 50 mL

The DURAN 217411702 is a 50 mL wide-neck round-bottom boiling flask made from DURAN® borosilicate glass 3.3, offering excellent resistance to thermal shock and chemical attack. Its wide-neck opening (~34 mm ID) makes filling, pouring, and cleaning significantly easier compared to narrow-neck equivalents, while the round-bottom geometry ensures uniform heating for reliable boiling and reaction control.

This flask is part of the ISO 24450 series, designed for laboratory heating and boiling applications. It is typically supplied in packs of 10 units, making it convenient for teaching laboratories, research facilities, and small-scale chemistry workflows. With its smooth beaded rim and wide-neck finish, it is durable under handling and easy to use with small-volume samples.

Features

• Durable Borosilicate Glass 3.3: Provides chemical resistance and low thermal expansion.

• Wide-Neck Design (~34 mm ID): Simplifies filling, pouring, and cleaning.

• Round-Bottom Shape: Promotes even heating, suitable for mantles and baths.

• Beaded Rim Finish: Reinforces the neck opening for durability.

• ISO 24450 Compliance: Adheres to international boiling flask standards.

• Packaged for Efficiency: Supplied in cases of 10 for laboratory stocking.

Key Specifications

• Catalogue Number: 217411702

• Nominal Capacity: 50 mL

• Material: DURAN® Borosilicate Glass 3.3

• Shape: Round-bottom, wide-neck boiling flask

• Body Outer Diameter: ~51 mm

• Neck Inner Diameter: ~34 mm

• Height: ~105 mm

• Neck Type: Wide neck with beaded rim

• Standards: ISO 24450 (non-DIN EN ISO thread compatibility)

• Autoclavable: Yes (~121 °C)

• Packaging: 10 units per pack

Applications

• Heating & Boiling: For small-volume chemical reactions or sample preparation.

• Distillation & Reflux: Suitable for uniform heating setups with mantles or baths.

• Small-Volume Chemistry: Ideal for reactions where ~50 mL capacity is sufficient.

• Teaching & Training: Packaged for use in educational labs with multiple students.

• Easy-Cleaning Glassware: Wide neck design makes it suitable where solids or viscous liquids are handled.