DURAN 217116406 Flat Bottom Flask 2000 mL

DURAN 217116406 — Flat-Bottom Flask 2000 mL (Narrow Neck, Beaded Rim)

The DURAN 217116406 is a 2,000 mL flat-bottom flask designed for laboratory heating, boiling, distillation, and general reaction work. Constructed from DURAN® borosilicate glass 3.3 (Type I / neutral glass), it offers outstanding chemical resistance and low thermal expansion, ensuring long-term durability even under repeated heating and sterilization.

The flat bottom allows the flask to stand stably on benches or heating surfaces without the need for a support ring, while the narrow neck with a beaded rim (~42 mm OD) provides controlled pouring and reinforced durability against chipping. Its uniform wall thickness ensures even heat distribution, minimizing hot spots during heating.

Supplied in packs of 10 units, this flask is autoclavable (~121 °C) and compliant with DWK/DURAN glassware quality standards.

Features

• Premium Borosilicate Glass 3.3 – High thermal shock resistance and chemical durability.

• Flat-Bottom Design – Stable placement without additional support rings.

• Narrow Neck (~42 mm OD) – Reduces evaporation and improves pouring control.

• Beaded Rim Reinforcement – Strengthens the neck opening and minimizes chipping.

• Uniform Wall Thickness – Promotes even heating and reduces risk of thermal stress.

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

• Bulk Packaging – Supplied in packs of 10 flasks, ideal for teaching and research labs.

Key Specifications

• Catalogue Number: 217116406

• Capacity: 2,000 mL

• Material: DURAN® Borosilicate Glass 3.3 (Type I / neutral)

• Neck Type: Narrow neck with beaded rim (~42 mm OD)

• Body Outer Diameter: ~166 mm

• Height: ~250 mm

• Bottom Type: Flat bottom

• Standards: DWK/DURAN laboratory glassware compliance

• Packaging: 10 units per pack

• Autoclavable: Yes (~121 °C)

Applications

• Heating & Boiling – Reliable for uniform heating of 2 L solutions.

• Distillation & Reactions – Ideal for chemistry workflows requiring thermal stability.

• Reagent Preparation & Storage – Suitable for medium-volume lab use.

• Teaching & Research – Efficient for labs requiring multiple identical flasks.

• Sterile Environments – Compatible with repeated autoclaving for safe reuse.