DURAN 217211706 Narrow Mouth Beaded Rim 50 mL

DURAN 217211706 Narrow Mouth Beaded Rim 50 mL

The DURAN 217211706 is a 50 mL round-bottom flask with a narrow-mouth neck and beaded rim, constructed from DURAN® borosilicate glass 3.3. This flask is designed for laboratory heating and reactions due to its round base, which provides excellent uniform heating and reduces hot spots when used over a flame or heating mantle. The beaded rim adds structural reinforcement to the neck, making it more durable under handling

The narrow-mouth neck with a reinforced beaded rim improves handling safety and minimizes the risk of chipping. Uniform wall thickness further enhances heat distribution and mechanical strength. This flask complies with DIN ISO 1773 standards, is fully autoclavable (~121 °C), and is supplied in cases of 10 units for efficient laboratory stocking.

Features

• High-Quality Borosilicate Glass: DURAN® 3.3 glass provides resistance to thermal shock and chemical corrosion.

• Round-Bottom Shape: Ensures even heating and is ideal for use with mantles or baths.

• Narrow Neck with Beaded Rim: Strengthens the opening against chipping and makes handling safer.

• Uniform Wall Thickness: Improves heat transfer and mechanical stability.

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

• DIN ISO 1773 Compliant: Meets international standards for laboratory glassware.

• Packaged in Bulk: Supplied in cases of 10 for convenience in laboratory operations.

Key Specifications

• Catalogue Number: 217211706

• Nominal Capacity: 50 mL

• Material: DURAN® Borosilicate Glass 3.3

• Neck Type: Narrow neck with beaded rim

• Base Type: Round bottom

• Outer Diameter: ~51 mm

• Height: ~95 mm

• Standards Compliance: DIN ISO 1773

• Autoclavable: Yes (~121 °C)

• Packaging: Case of 10 flasks

Applications

• Heating and boiling small volumes of solutions using mantles or baths.

• Reaction setups in organic and inorganic chemistry.

• Distillation, reflux, or boiling experiments where round-bottom flasks are standard.

• Suitable for synthetic chemistry and educational laboratory use.

• General laboratory workflows where approximate, not exact, volumetric measurements are acceptable.