Round Bottom Flask
Product Code : SCL-CLE-11928
Quick Answer: The Round Bottom Flask is a spherical borosilicate glass 3.3 flask for reactions, distillation and heating, made from 50 ml to 5000 ml with one to four necks and plain rims or 14/23, 19/26 or 24/29 ground joints.
Last updated: 18 October 2026
Key Features
- Spherical shape spreads heat evenly and distributes stress, so this round bottom flask suits vacuum work and vigorous boiling.
- Single, two, three or four-neck versions.
- Plain rim or standard ground-glass joints: 14/23, 19/26 or 24/29.
- High resistance to thermal shock and localised hot spots.
- Seven capacities from 50 ml to 5000 ml.
Technical Specifications
| Specification | Value |
|---|---|
| Material | Borosilicate glass 3.3 |
| Capacities | 50, 100, 250, 500, 1000, 2000, 5000 ml |
| Joints | Plain rim or ground glass 14/23, 19/26, 24/29 |
| Necks | Single, two, three or four |
| Support needed | Cork ring or heating mantle |
How It Is Used
Used in organic synthesis, distillation and solvent recovery, the flask is heated in a heating mantle or an oil or sand bath; a direct flame should only be used with a wire gauze to spread the heat. It must rest in a cork ring or mantle, never directly on a flat bench while it holds liquid, and should be clamped by the neck with a boss head and clamp, especially when a condenser is attached.
Frequently Asked Questions
How should a Round Bottom Flask be supported?
Rest it in a cork ring or a heating mantle and clamp it by the neck with a boss head and clamp. It should never stand directly on a flat bench while it contains liquid.
What is the right way to heat the Round Bottom Flask?
A heating mantle or an oil or sand bath gives uniform heating. Avoid a direct flame unless a wire gauze is used to spread the heat.
Related Chemistry Lab Equipment
See the full chemistry lab equipment range, or these related round bottom flasks and distillation fittings:
- 3 Neck Round Bottom Flask
- 4 Neck Round Bottom Flask
- Round Bottom Flask With Two Neck
- Liebig Condenser
- Four Finger Clamp
For a quotation on the Round Bottom Flask, contact JLab India on +91-8569909696.
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