Round Bottom Flask 250ml

The Round Bottom Flask 250ml is a laboratory vessel used for holding, mixing and processing compatible liquids during chemistry and general laboratory procedures. Its 250 mL nominal capacity and spherical lower body make it suitable for laboratory setups where even liquid circulation and controlled support of the flask are required.

Product Description

The STEMAids Round Bottom Flask 250ml has a rounded body rather than a flat standing base. This geometry supports smooth swirling and circulation of liquids during suitable laboratory procedures. Because the flask cannot normally stand upright unsupported, it should be used with an appropriate clamp, flask ring or laboratory support.

The confirmed nominal capacity is 250 mL. The exact glass composition, neck configuration, joint type, wall thickness, dimensions and temperature limits are . Heating suitability must be verified before the flask is exposed to a flame, heating mantle or other heat source. Browse related STEMAids laboratory glassware.

Key Features

• 250 mL nominal capacity: Suitable for small-scale chemistry preparations and laboratory procedures.
• Round-bottom geometry: Supports smooth swirling and liquid circulation during compatible laboratory processes.
• Laboratory flask format: Suitable for holding, mixing and processing compatible liquids.
• Support-based use: Designed to be secured using suitable laboratory support because the rounded base does not stand independently.
• Reusable laboratory vessel: Can be cleaned and reused when permitted by its material and the substances handled.
• Teaching and professional use: Applicable to supervised chemistry, college, university and research laboratory procedures.
• Thermal specification: Glass grade and heating limits are and should not be assumed from the flask shape alone.

Technical Specifications

What’s Included in the Kit

• Round Bottom Flask 250ml 
• Stopper or joint closure
• Flask support or clamp
• Protective product packaging

Applications / Uses

• Holding and mixing compatible laboratory liquids.
• Preparing small quantities of laboratory solutions.
• Supporting suitable chemical-reaction setups.
• Swirling liquids during chemistry experiments.
• Use in suitable heating, reflux or distillation assemblies when the exact product specification permits.
• Teaching laboratory flask handling and reaction-apparatus setup in schools and colleges.

For complementary equipment, explore STEMAids chemistry laboratory equipment and the broader laboratory glassware range.

How to Use the Round Bottom Flask 250ml

1. Inspect the flask for cracks, chips, scratches or contamination before use.
2. Place the flask in a suitable ring, clamp or laboratory support so it cannot roll or fall.
3. Confirm that the flask material is compatible with the substance being handled.
4. Add the required liquid using appropriate laboratory transfer equipment.
5. Secure the flask correctly if it forms part of a reaction, reflux or distillation setup.
6. Mix or process the contents according to the relevant experimental procedure.
7. After use, allow the flask to reach a safe handling condition before cleaning and storage.

Safety note: A round-bottom flask should not be left unsupported on a laboratory bench. Do not heat it unless STEMAids confirms the glass composition, thermal suitability and intended heating conditions for this specific model.

Care & Maintenance

• Clean the flask with a method compatible with its material and previous contents.
• Avoid sudden temperature changes unless its thermal-shock resistance is verified.
• Inspect the neck, joint and rounded body regularly for cracks or impact damage.
• Store the flask securely in a rack, holder or protected cabinet to prevent rolling and breakage.

Why Choose STEMAids

STEMAids is the STEM education brand of Eduscope Smart Learning Solutions Private Limited, a New Delhi-based manufacturer whose registered production activities include laboratory glassware. The company publishes ISO 9001:2015 quality-management credentials and maintains an active Importer-Exporter Code for export orders. STEMAids supplies schools, colleges, laboratories and institutional procurement projects. These company credentials do not establish product-specific ISO 1773 conformity, glass composition or thermal performance unless separately documented.

Frequently Asked Questions

What is a Round Bottom Flask 250ml used for?

A Round Bottom Flask 250ml is used for holding, mixing and processing compatible liquids during laboratory procedures. It may also form part of reaction, reflux or distillation setups when its verified specification is suitable.

What is the capacity of this round bottom flask?

The STEMAids Round Bottom Flask has a nominal capacity of 250 mL.

Why is a round bottom flask shaped differently from a flat bottom flask?

A round-bottom body supports smooth liquid circulation and swirling but does not stand independently. A flat-bottom flask can normally rest directly on a stable laboratory surface.

What material is the STEMAids Round Bottom Flask 250ml made from?

The exact glass composition is . Borosilicate glass should not be claimed unless verified by the current STEMAids product specification.

Can this 250 mL round bottom flask be heated?

Heating compatibility is . Do not use a flame, heating mantle or other heat source until the flask’s material and permitted temperature conditions have been verified.