DURAN 241203703 Evaporating Flask Pear Shape 250 mL

DURAN 241203703 Evaporating Flask Pear Shape 250 mL Joint NS 29/32

The DURAN 241203703 is a 250 mL pear-shaped evaporating flask designed for reliable performance in solvent evaporation, concentration, and heating processes. Manufactured from high-quality DURAN® borosilicate glass 3.3, it provides excellent chemical resistance, low thermal expansion, and long-term durability under demanding laboratory conditions.

The pear-shaped body features a broad base that increases the surface area for efficient evaporation and a narrower neck to minimize vapor loss. Its standard NS 29/32 ground-glass joint allows secure and tight connections with condensers, adapters, and rotary evaporators. The flask is fully autoclavable, making it reusable for sterilized laboratory workflows.

Key Features

• Durable Borosilicate Glass 3.3: Superior thermal and chemical resistance for laboratory use.

• Pear-Shaped Geometry: Enhances evaporation efficiency by increasing surface area.

• Standard Ground Joint (NS 29/32): Ensures compatibility with rotary evaporators and jointed glassware.

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

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

• Packaged in Sets: Commonly supplied in packs of 10 flasks for efficient lab stocking.

Specifications

• Catalogue Number: 241203703

• Capacity: 250 mL

• Material: DURAN® Borosilicate Glass 3.3

• Shape: Pear-shaped evaporating flask

• Joint Type / Size: Standard ground joint, NS 29/32

• Body Diameter: ~ 81 mm

• Height: ~ 140 mm

• Packaging: Pack of 10 units

• Autoclavable: Yes (~121 °C)

Applications

• Rotary Evaporation: Solvent removal and concentration in organic and analytical labs.

• Heating Baths / Oil Baths: Safe and efficient solvent evaporation.

• Sample Concentration: Useful for reducing sample volume under controlled heating.

• General Laboratory Work: Ideal for chemical synthesis, research, and educational use.