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Distillation Flask
Distillation Flask (Product Code: SLE/GFL/08) is a borosilicate glass flask with a built-in side arm, used in chemical laboratories to separate liquid mixtures by distillation: the mixture is heated in the bulb, the vapour leaves through the side arm into a condenser, and the condensed liquid is collected separately. Chemistry teachers, lab technicians and students in schools, colleges and universities use it for simple distillation practicals. It is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, as part of the borosilicate glassware it supplies across India and international markets.
Specifications
| Parameter | Detail |
|---|---|
| Material | Borosilicate glass |
| Resistance | Heat resistant and chemical resistant |
| Design | Flask with a side tube (side arm) that carries vapour to a condenser |
| Capacities | 100 mL, 125 mL, 250 mL, 500 mL |
| 100 mL size | Diameter 65 mm; height 215 mm; side tube diameter 7 mm; arm length 100 mm |
| 125 mL size | Diameter 68 mm; height 215 mm; side tube diameter 7 mm; arm length 100 mm |
| 250 mL size | Diameter 85 mm; height 226 mm; side tube diameter 9 mm; arm length 130 mm |
| 500 mL size | Diameter 105 mm; height 240 mm; side tube diameter 9 mm; arm length 130 mm |
| Application | Separating liquid mixtures by distillation in chemical laboratories |
Typical Use
In a standard simple-distillation practical the flask is filled to no more than about half its volume with the mixture — salt water or an ethanol–water solution, for example — and a few anti-bumping granules are added for smooth boiling. The neck is closed with a stopper carrying a thermometer whose bulb sits level with the side-arm opening, so the reading shows the temperature of the vapour actually leaving the flask. The side arm is then joined to a condenser and the distillate collected in a receiver. Since the flask sits at the heart of any laboratory distillation apparatus and is heated and cooled again and again, borosilicate glass is the practical material for it.
Match the size to the batch: the 100 mL and 125 mL flasks, with their 7 mm side tubes, suit student-scale bench work, while the 250 mL and 500 mL flasks carry a wider 9 mm side tube and a longer 130 mm arm for larger volumes and demonstrations. Heat gradually with a heating mantle or over a wire gauze, clamp the flask at the neck rather than the bulb, and let it cool fully before rinsing.
Manufacturer
This flask is made by Jain Scientific Equipments Private Limited, a company that trades as ScienceLab from its base in Ambala, Haryana, producing laboratory glassware and teaching apparatus for schools, colleges and laboratories. An overview of the business is available on our company profile page.
Related Laboratory Equipment
Items usually assembled with this flask for a complete distillation set-up:
- Liebig Condenser — connects to the side arm and cools the vapour back to liquid
- Heating Mantle — flame-free heat source for the flask bulb
- Retort Clamp Three Finger — holds the flask securely by the neck on a stand
- Rubber Cork — seals the flask neck around the thermometer
- Conical Flask — a convenient receiver for the collected distillate
See every flask style we make in the Glassware Flasks category.
Frequently Asked Questions
Which capacities can I order?
The flask is listed in 100 mL, 125 mL, 250 mL and 500 mL capacities. The dimensions of each size are given in the specifications table above.
How do the side arms differ between sizes?
The 100 mL and 125 mL flasks have a 7 mm side tube with a 100 mm arm; the 250 mL and 500 mL flasks have a 9 mm side tube with a 130 mm arm. Check that your condenser inlet or connecting tubing suits the tube diameter you choose.
Can it be heated over a Bunsen burner?
Yes, borosilicate glass is heat resistant, but heat through a wire gauze or use a heating mantle so the bulb warms evenly. Never heat the flask empty, and avoid placing a hot flask on a cold or wet surface.
Are a condenser, thermometer and stopper included?
This listing is for the flask itself. Condensers, corks and clamps are listed separately; contact us if you would like a quotation for a complete distillation set.
How should the flask be cleaned after use?
Let it cool, empty any residue, then wash with laboratory detergent and a soft bottle brush and rinse with distilled water. Remove stubborn deposits by soaking rather than scraping, which can scratch the glass.
What warranty applies?
Warranty terms are stated with each quotation — please ask us for the current terms.
Can you supply school or export quantities?
Yes. Send the capacities, quantity of each and the delivery location in India or abroad, and we will reply with pricing and dispatch details for your institution or distributorship.
Request a Quote
For prices on one or more sizes, contact us or add this flask to your enquiry cart with the capacities and quantities you need.
Last updated: 24 September 2026
