DURAN 217213604 Flask 250 mL Narrow Neck Beaded Rim

DURAN 217213604 Round Bottom Flask 250 mL Narrow Neck Beaded Rim

The DURAN 217213604 is a 250 mL round-bottom flask made from DURAN® borosilicate glass 3.3, engineered for high durability, excellent chemical resistance, and reliable thermal performance. Its round-bottom design ensures even heat distribution, making it ideal for processes such as boiling, reflux, and distillation.

The narrow mouth is strengthened with a beaded rim, which enhances mechanical stability and minimizes the risk of chipping during frequent handling or washing. The flask complies with DIN ISO 1773 standards, ensuring laboratory-grade performance and compatibility. It is autoclavable at ~121 °C, making it suitable for repeated use in sterile environments.

Key Features

• Premium DURAN® Borosilicate Glass 3.3: High resistance to thermal shock and chemical attack

• Round Bottom Design: Enables consistent and even heating

• Narrow Neck with Beaded Rim: Enhanced strength and chip resistance

• Standard-Compliant: Manufactured according to DIN ISO 1773 for laboratory use

• Autoclavable (~121 °C): Suitable for steam sterilization and reuse

• Laboratory Pack: Typically supplied in sets of 10 for efficient stocking

Technical Specifications

Catalogue Number: 217213604
Nominal Capacity: 250 mL
Material: DURAN® Borosilicate Glass 3.3
Neck Type: Narrow mouth with beaded rim
Body Outer Diameter: ~85 mm
Height: ~144 mm
Bottom Type: Round bottom
Standard Compliance: DIN ISO 1773
Autoclavable: Yes (~121 °C)
Packaging: Pack of 10 units

Applications

• Reflux and Distillation: Ideal for procedures needing uniform heating

• Boiling or Heating Liquids: Compatible with heating mantles or baths

• Synthesis and Reaction Setups: Trusted vessel for organic chemistry workflows

• Education and Research: Widely used in teaching labs and pilot research facilities

• Sterile Environments: Suitable for repeated sterilization cycles