DURAN 217217109 Round Bottom Flask 4000 mL

DURAN 217217109 Round-Bottom Flask Narrow Neck Beaded Rim 4000 mL

The DURAN 217217109 is a 4,000 mL round-bottom flask constructed from high-quality DURAN® borosilicate glass 3.3. Designed for professional laboratory use, it features a narrow neck with a beaded rim for added mechanical strength and safety. Its round bottom ensures uniform heating, making it suitable for boiling, distillation, reflux, and chemical reactions involving heat.

This flask is compliant with DIN ISO 1773 standards and is autoclavable at approximately 121 °C, allowing for repeated sterilization and reuse. Its uniform wall thickness supports optimal thermal performance and minimizes the risk of breakage under temperature changes.

Features

• Durable Construction
  Made from DURAN® borosilicate glass 3.3 with excellent thermal and chemical resistance.

• Round-Bottom Design
  Promotes even heat distribution, essential for consistent reaction outcomes.

• Beaded Rim Neck
  Reinforced narrow neck resists chipping and provides enhanced mechanical stability.

• Autoclavable (~121 °C)
  Supports safe sterilization and reuse, ideal for microbiological or chemical applications.

• Standards Compliant
  Manufactured according to DIN ISO 1773 for laboratory glassware quality and consistency.

Specifications

Applications

• Chemical Reactions & Heating
  Suitable for high-volume heating, boiling, and reflux procedures in both teaching and industrial labs.

• Distillation & Synthesis
  Often used in distillation setups requiring even thermal input and round-bottom geometry.

• Media Preparation
  Ideal for preparing and storing large volumes of culture media or chemical reagents.

• Repeated Sterilization
  Withstands multiple sterilization cycles, making it cost-effective for long-term use.