Flat Bottom Flask 250ml

Quick Answer

This 250ml flat bottom flask is a glass flask with a level base that lets it stand upright unsupported on the bench, making it a convenient general-purpose vessel for mixing, heating, and holding liquids in the laboratory.

Description

Unlike a round bottom flask, which needs a stand or clamp to stay upright, a flat bottom flask can sit directly on the bench once it has cooled, which makes it convenient for everyday tasks such as receiving a titrant, holding a prepared solution, or mixing reagents by hand. At a 250ml capacity, this size suits routine laboratory work without being unwieldy to handle.

The flask’s neck allows liquid to be poured in and out cleanly, and its flat base gives good stability during swirling or gentle mixing, which is one reason this shape is a common choice as a titration receiving vessel alongside its general role as an all-purpose reaction and mixing flask.

Specifications

Applications

• General-purpose mixing and heating of liquids during reactions
• Holding the receiving solution during a titration setup
• Boiling or evaporating liquids on a hot plate or over a low flame, where the glass type supports it
• Standing storage of a prepared solution during multi-step laboratory work

Care & Handling

• Allow the flask to cool gradually after heating rather than placing it on a cold or wet surface
• Support the flask in a stand or clamp when heating over a flame, even though it can stand alone once cool
• Clean thoroughly and rinse before reuse so residue does not affect the next experiment
• Check the base regularly for chips, since a flat-bottomed flask relies on an even, undamaged base to sit securely
• Swirl gently by hand rather than shaking vigorously when mixing a filled flask

Why Choose LabEquip

This flat bottom flask is part of our complete lab glassware range, so you can pair it with burettes and pipettes for a full titration setup. Browse further apparatus in our chemistry lab equipment catalogue, and contact us for bulk laboratory orders.

Frequently Asked Questions

What is a 250ml flat bottom flask used for?

It is used as a general-purpose vessel for mixing, heating, and holding liquids, and is a common choice as the receiving flask in a titration because it stands securely on the bench during swirling.

Can this flask stand on its own without a support stand?

Yes, its flat base lets it stand upright unsupported on a level bench once it has cooled, unlike a round bottom flask, which always needs a stand, ring, or clamp.

Can this flask be heated directly over a flame?

Heating should always be supported in a stand or clamp rather than resting the flask directly on an open flame surface, and the appropriate glass type and heat source should be confirmed for your specific procedure.

What is the difference between a flat bottom and round bottom flask?

A flat bottom flask can stand upright on its own on a level surface, while a round bottom flask has a curved base that must be supported in a stand, ring, or heating mantle at all times.

How should I cool the flask after heating?

Let it cool gradually in the air or on a heat-resistant mat rather than placing it directly onto a cold or wet surface, which can cause thermal shock and crack the glass.

Can LabEquip supply flat bottom flasks in bulk for a laboratory?

Yes, LabEquip supplies flat bottom flasks in bulk for schools, colleges, and laboratories; contact us with your required quantity.

Last Updated: September 2026