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Two-Neck Round Bottom Flask (25–3000mL)

The two-neck round bottom flask features a classic spherical body with a narrow neck design. It is commonly used in chemical laboratories for reactions requiring heating, reflux, or long-term processing.

Product Details

The two-neck round bottom flask features a classic spherical body with a narrow neck design. It is commonly used in chemical laboratories for reactions requiring heating, reflux, or long-term processing. The narrow neck helps minimize liquid evaporation and splashing, and can be sealed with a rubber stopper or connected to other glass apparatus for experimental setups.

This flask is widely used in heating and reflux reactions. Its structure allows better control of vapor loss and improves experimental safety. Due to the narrow opening, stirring with a glass rod is not recommended; instead, gentle swirling by hand or the use of a magnetic stirrer is preferred. When heating under reflux conditions, a magnetic stirring bar can be placed inside the flask for uniform mixing.

未标题-5

Features:

Standard Two-Neck Design: Suitable for connecting additional laboratory glassware for complex experimental systems.

Ground Glass Joints with Size Marking: Precise joint sizes for easy matching and convenient operation.

Clear and Durable Markings: Labels are clearly printed and resistant to wear, ensuring long-term readability.

Smooth Glass Surface: High-quality finish for easy cleaning and reduced contamination risk.

Round Bottom Structure: Ensures uniform heat distribution and stable reaction performance during heating.

Designed for Reflux Applications: Ideal for long-term heating, chemical synthesis, and laboratory reaction processes.

Order#

Capacity

Main Neck (Ground Joint)

Side Neck (Ground Joint)

25mL

14mm

14mm

25mL

19mm

19mm

25mL

24mm

24mm

50mL

19mm

14mm

50mL

19mm

19mm

50mL

19mm

24mm

50mL

24mm

24mm

100mL

19mm

19mm

100mL

24mm

19mm

100mL

24mm

24mm

100mL

24mm

29mm

150mL

19mm

19mm

150mL

24mm

24mm

250mL

19mm

19mm

250mL

24mm

19mm

250mL

24mm

24mm

500mL

24mm

24mm

500mL

29mm

24mm

1000mL

24mm

24mm

2000mL

24mm

24mm

3000mL

24mm

24mm


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