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. Laboratories assembling a laboratory distillation apparatus in India can obtain it from Science Lab Supplies in Ambala, whether they are schools, universities, technical institutes, tender contractors or stockists.
Specifications
Specification rows for the 250 ml spherical flask follow. In short, it has a round bottom, a long mouth (neck) and a capacity of 250 ml, in transparent glass that is chemical resistant and heat resistant; its curved walls take heat evenly from a water bath or gauze, and the neck accepts a stopper, adapter or condenser.
| Specification | Value |
|---|---|
| SKU | SCL-CL-11505 |
| Also known as | Round-bottom flask, spherical flask |
| Type | Pot (spherical flask) |
| Capacity | 250 ml |
| Body | Spherical |
| Bottom | Round |
| Mouth | Long mouth (neck) |
| Material | Glass |
| Colour | Transparent |
| Chemical resistance | Chemical resistant |
| Heat resistance | 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, with a thermometer held in one of the Rubber Stoppers of Various Diameters with Holes.
- Class 11–12 chemistry: boiling-point and purification demonstrations, heated over a Ceramic Mesh.
- B.Sc. organic chemistry: reflux of reaction mixtures and recovery of solvents, warmed in a bath on an Electric Hot Plate.
- 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 transparent glass flask with a spherical body, round bottom and long neck. It comes without stopper, condenser, clamp or heater; these are separate items 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, so one document covers the whole distillation bench.
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. Tell the team what you need on the contact page, gather the flask and its fittings in the enquiry cart, or check the lab tender page if the purchase goes through a tender.
Frequently Asked Questions
When should I choose 250 ml instead of 100 ml?
Choose 250 ml when a preparation or distillation involves more liquid. Fill a flask to no more than about half its volume, so the larger size leaves 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 heat resistant and the spherical shape spreads heat evenly. Heat it gently through a water bath or gauze and never when the flask is closed.
Who supplies the Round Bottom Jars (Spherical Balloons) 250ml?
Supply comes from Science Lab Supplies in Ambala, India, which quotes single flasks or laboratory quantities and can include adapters, thermometers and other distillation accessories on the same quotation.
Related Distillation Glassware and Fittings
Distilling or refluxing with a 250 ml flask calls for an adapter, a thermometer and tubing for condenser water, and a complete distilling set can replace individual parts. These 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 — 100 ml version with the same round bottom and long mouth.
- Adapter (Alunge) — clear refractory glass adapter tube, 150 mm long.
- Apparatus for Distilling Liquids — set with a 250 ml side-funnel flask, a 300 mm Liebig condenser and a 0–100 °C thermometer.
- Laboratory Thermometers — alcohol glass thermometer graduated from −10 to 100 °C.
- Round Bottom Flask, Wide Neck — beaded-rim flask 105 mm across with a 50 mm neck.
- Rubber Tube (Laboratory) — natural rubber hose with a 6 mm bore and 9 mm outer diameter.
- Flat-Bottomed Flasks 250ml — 250 ml spherical glass flask with a flat bottom and long mouth.
Browse the full Chemistry Lab range, the Laboratory Flasks range, or all school lab equipment.
Last updated: 9 October 2026
