Round Bottom Jars (Spherical Balloons) 250ml
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Product Code : SCL-CL-11505
Round Bottom Jars (Spherical Balloons) 250ml (SKU SCL-CL-11505) is the 250 ml size of the round-bottom flask, with a spherical transparent glass body and a long neck. The extra volume suits preparations, reflux and distillations that need more liquid than a 100 ml flask holds, in school demonstrations and college organic chemistry. Science Lab Supplies, working from Ambala, India, supplies it to schools, colleges, training institutes, tender contractors and distributors equipping a laboratory distillation apparatus in India.
Specifications
This spherical flask has a round bottom, a long mouth (neck) and a capacity of 250 ml. The transparent glass is listed as chemical resistant and heat resistant. Its curved walls take heat evenly from a water bath or heating mantle, and the neck accepts a stopper, adapter or condenser.
| Parameter | Value |
|---|---|
| SKU | SCL-CL-11505 |
| Also known as | Round-bottom flask, spherical flask |
| Capacity | 250 ml |
| Shape | Spherical body, round bottom, long neck |
| Material | Glass |
| Colour | Transparent |
| Properties | Chemical resistant, heat resistant |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Round Bottom Flask 250 ml
The 250 ml round-bottom flask is a working size for distillation and reflux in teaching laboratories. It supports Class 9 and Class 11–12 chemistry demonstrations of separating liquids by distillation, B.Sc. organic synthesis and solvent recovery, and pharmacy or industrial chemistry practicals.
- Class 9 science: demonstrating the separation of two miscible liquids by distillation.
- Class 11–12 chemistry: boiling-point and purification demonstrations.
- B.Sc. organic chemistry: reflux of reaction mixtures and recovery of solvents.
- Pharmacy and industrial chemistry courses: small-batch preparations and extractions.
Standard Scope of Supply
The Round Bottom Jars (Spherical Balloons) 250ml is supplied as one glass flask as described above. It comes without stopper, condenser, clamp or heater; these are listed separately and can be added to the quotation.
Packing, MOQ and Lead Time
Quotations are available for one flask up to a full laboratory set, each stating the packing, delivery time and price for the quantity entered. Adapters, thermometers and distillation apparatus can be grouped on the same quotation to reduce paperwork.
Science Lab Supplies, registered as an exporter with an Importer-Exporter Code, is able to ship to buyers in Iraq, Nigeria, Kenya, Ghana, Ethiopia and Tanzania. Write to us through the contact page, save your list in the enquiry cart, or consult the lab tender page for procurement through tenders.
Frequently Asked Questions
When should I choose 250 ml instead of 100 ml?
Choose 250 ml when a preparation or distillation involves more liquid; a flask is normally filled to no more than about half its volume, so the larger size gives room for boiling.
Can this flask stand on the bench?
No. Its round bottom needs support: clamp the neck to a stand or seat the flask on a cork ring when it is not in use.
Is it suitable for heating?
Yes. The glass is listed as heat resistant and the spherical shape spreads heat evenly. Heat it gently through a water bath or gauze and never when closed.
Who supplies the Round Bottom Jars (Spherical Balloons) 250ml?
It is supplied by Science Lab Supplies from Ambala, India, which prepares quotations for single flasks or laboratory quantities along with matching distillation accessories.
Related Distillation Glassware
To distil or reflux with a 250 ml flask, laboratories add an adapter, a thermometer and often a complete distilling set. These four Chemistry Lab items work with the flask on the same bench, and listing them together lets one quotation cover the full assembly.
- Round Bottom Jars (Spherical Balloons) 100ml — smaller flask for small-scale work.
- Adapter (Alunge) — connects the condenser to the receiving vessel.
- Apparatus for Distilling Liquids — set for distillation demonstrations.
- Laboratory Thermometers — for reading vapour temperature during distillation.
Browse the full Chemistry Lab range or all school lab equipment.
Last updated: 25 September 2026
