DURAN 217218705 Round Bottom Flask 12 000 mL 

DURAN 217218705 Round-Bottom Flask, Narrow-Mouth, Beaded & Reinforced Rim, 12,000 mL

The DURAN 217218705 is a 12,000 mL (12 L) round-bottom flask designed for large-scale laboratory and industrial applications. Constructed from DURAN® borosilicate glass 3.3, it provides outstanding resistance to thermal shock and chemical attack, making it ideal for demanding workflows.

Its round-bottom geometry ensures highly uniform heating across large liquid volumes, while the narrow-mouth neck with a beaded and reinforced rim enhances durability and reduces the risk of breakage at the neck. This model is part of the non-DIN ISO series, conforming instead to ASTM E1403 specifications, making it suitable for large-volume applications beyond standard flask dimensions.

At ~380 mm tall with a body diameter of ~295 mm and neck OD of ~65 mm, this flask is optimized for bulk heating, distillation, reflux, and large-scale reagent or media preparation. It is fully autoclavable, ensuring safe sterilization and repeated use in laboratories.

Features

• Large Capacity: 12 L flask for bulk-scale reactions, heating, and media preparation.

• Round-Bottom Shape: Provides excellent uniform heating and minimizes hot spots.

• Narrow Mouth with Beaded & Reinforced Rim: Improves durability and reduces chipping during handling.

• Premium Borosilicate Glass 3.3: Ensures superior resistance to chemicals and thermal stress.

• Uniform Wall Thickness: Enhances safety and consistency under heating.

• ASTM E1403 Compliant: Designed for large-volume applications outside DIN ISO sizes.

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

Key Specifications

• Catalogue Number: 217218705

• Nominal Capacity: 12,000 mL

• Material: DURAN® Borosilicate Glass 3.3

• Neck Type: Narrow-mouth, beaded & reinforced rim (~65 mm OD)

• Body Outer Diameter: ~295 mm

• Height: ~380 mm

• Standards: ASTM E1403 (non-DIN ISO size)

• Autoclavable: Yes (~121 °C)

• Packaging: Single unit (1 flask per pack)

Applications

• Heating and Storage of Large Volumes: Ideal for bulk solutions, reagents, or media.

• Distillation, Reflux, and Reaction Workflows: Compatible with large-scale heating setups.

• Industrial and Research Labs: Suitable for scale-up chemistry, process development, and pilot-plant use.

• Sterile Media Preparation: Fully autoclavable for microbiology and biotechnology applications.