DURAN 217217306 Round Bottom Flask 5000 mL

DURAN 217217306 Round Bottom Flask Narrow Mouth Beaded Rim 5000 mL

The DURAN 217217306 is a 5,000 mL round-bottom flask designed for large-scale laboratory processes where durability, chemical resistance, and uniform heating are essential. Made from DURAN® borosilicate glass 3.3, this flask withstands harsh chemicals, repeated heating, and sterilization cycles while maintaining structural integrity.

Its round-bottom geometry ensures even heat distribution, making it ideal for boiling, reflux, and distillation setups. The narrow-mouth opening is strengthened with a beaded rim, reducing the risk of chipping and enhancing mechanical strength during use. With uniform wall thickness, the flask is built to handle demanding heating and cooling cycles safely.

This model belongs to the non-DIN ISO size series, offering extra-large capacity beyond standard round-bottom flask ranges. It is autoclavable (~121 °C), allowing safe sterilization for repeated use in chemical, biological, and industrial laboratories.

Features

• High Capacity: 5000 mL volume, ideal for scale-up experiments and bulk solution handling.

• Round-Bottom Shape: Promotes even heating and reduces the risk of hot spots during reactions.

• Reinforced Narrow Neck: Beaded rim increases durability and reduces breakage risk.

• Premium Borosilicate Glass 3.3: Provides excellent resistance to thermal shock and aggressive chemicals.

• Uniform Wall Thickness: Supports stability and safety during thermal cycling.

• Autoclavable (~121 °C): Suitable for sterilization and microbiological applications.

• Non-DIN ISO Size: Large-volume capacity outside standard series for greater flexibility.

Specifications

• Catalogue Number: 217217306

• Nominal Capacity: 5000 mL

• Material: DURAN® Borosilicate Glass 3.3

• Neck Type: Narrow mouth with beaded rim (~52 mm OD)

• Shape: Round bottom

• Body Outer Diameter: ~225 mm

• Height: ~310 mm

• Standards: Non-DIN ISO series

• Autoclavable: Yes (~121 °C)

• Packaging: Single unit (1 flask per pack)

Applications

• Reflux, Boiling, and Distillation: Compatible with heating mantles and baths for uniform heating.

• Large-Scale Reactions: Suitable for synthesis and scale-up in organic and inorganic chemistry.

• Teaching & Research: Commonly used in universities and R&D environments for durability and reusability.

• Sterile Media Preparation: Practical for microbiology or biotechnology labs preparing large volumes of culture media.