DURAN 217116809 Narrow Neck Beaded 3000 mL

DURAN 217116809 — Flat-Bottom Flask 3000 mL (Narrow Neck Beaded Rim)

The DURAN 217116809 is a 3,000 mL flat-bottom flask made from premium DURAN® borosilicate glass 3.3, offering excellent chemical resistance, low thermal expansion, and high durability for laboratory use. Its flat base allows it to sit securely on benches or hot plates without a support ring, making it highly convenient for heating or reaction work. The narrow neck with a beaded rim (~50 mm OD) provides controlled pouring, reduces evaporation, and adds mechanical strength to resist chipping during handling.

This model belongs to the non-DIN ISO size series, meaning its dimensions differ from standard DIN ISO sizes, but it maintains the same high-quality standards and reliability of all DURAN laboratory glassware. With uniform wall thickness, it ensures even heating and reduces hot spots, making it suitable for boiling, distillation, and large-scale chemical preparations. Fully autoclavable (~121 °C), the flask supports repeated sterilization cycles for safe reuse.

Features

• High-Quality DURAN® Borosilicate Glass 3.3 – Excellent resistance to chemicals and thermal shock.

• Flat-Bottom Design – Provides stability on work surfaces and heating equipment without support rings.

• Narrow Neck with Beaded Rim (~50 mm OD) – Enables controlled pouring and strengthens the neck against chipping.

• Uniform Wall Thickness – Promotes even heat distribution and thermal stability during heating.

• Large 3 L Capacity – Suitable for medium-to-large volume lab operations.

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

• Non-DIN ISO Size – Alternative sizing for labs that require flexibility beyond standard ISO dimensions.

Key Specifications

• Catalogue Number: 217116809

• Capacity: 3,000 mL

• Material: DURAN® Borosilicate Glass 3.3

• Shape: Flat-bottom flask

• Neck Type: Narrow neck with beaded rim (~50 mm OD)

• Outer Body Diameter: ~185 mm

• Height: ~250 mm

• Thermal Expansion Coefficient: ~33 × 10⁻⁷ / °C (20–300 °C)

• Standards: Non-DIN ISO size classification

• Packaging: 1 unit per pack

• Autoclavable: Yes (~121 °C)

Applications

• Heating & Boiling – Reliable for uniform heating of 3 L volumes.

• Reaction & Distillation Work – Well-suited for larger-scale chemistry experiments.

• Reagent Preparation – Useful for preparing and mixing solutions in bulk.

• Teaching & Research – Practical in labs requiring durable glassware for repeated use.

• Industrial Laboratories – Suitable for routine large-volume applications where stability and strength are critical.