Round Bottom Flask, Narrow Neck
Product Code : LSK-LF-10428
Round Bottom Flask, Narrow Neck (SKU LSK-LF-10428) is a borosilicate glass flask with a spherical base and a narrow neck finished with a rim, intended for heating and boiling liquids evenly. It has a 166 mm base diameter, a 50 mm neck diameter and a height of 260 mm, and it suits school and college chemistry practicals. Working from Ambala, Science Lab Supplies quotes and supplies this round bottom flask in India for schools, colleges, tender contractors and distributors.
Specifications
Every dimension of the 166 mm round bottom flask is given its own row below. In short, the rounded base spreads heat evenly and copes with boiling better than a flat base, while the rimmed narrow neck takes a bored bung for a thermometer, delivery tube or condenser; the flask is borosilicate glass, 260 mm high.
| Specification | Value |
|---|---|
| SKU | LSK-LF-10428 |
| Glass | Borosilicate |
| Base | Round |
| Neck | Narrow, with rim |
| Base diameter | 166 mm |
| Neck diameter | 50 mm |
| Height | 260 mm |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Round Bottom Flask
A round bottom flask can be used wherever a liquid must be heated or boiled evenly, from preparing gases and distilling liquids to classroom demonstrations. As school chemistry lab equipment in India it suits secondary and senior-secondary practicals, and it serves college reflux and distillation work as well.
- Class 9–10 science: heating and boiling demonstrations and simple distillation set-ups.
- Class 11–12 chemistry: laboratory preparation of gases and demonstrations such as the fountain experiment.
- B.Sc. chemistry practicals: reflux and distillation with bung-fitted condensers.
Support the flask at all times, since its rounded base cannot stand on its own: clamp the neck to a Retort Stand with Boss Head and Clamp or grip the body in a Four Prong Laboratory Clamp, and heat it gradually through wire gauze or in a mantle.
Standard Scope of Supply
The Round Bottom Flask, Narrow Neck is supplied as a single unit as described above. Bungs, cork rings, clamps and heating equipment can be added to the quotation as optional accessories, so the flask arrives ready to assemble into a heating or distillation set-up.
Packing, MOQ and Lead Time
Request one flask for a demonstration table or a full quantity for a practical lab; the quotation gives packing, delivery time and price to match. Other borosilicate laboratory glassware in India, such as the wide-neck version or distillation flasks, can join the same quotation.
As a registered exporter with an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Nigeria, Kenya, Ghana, Ethiopia, Tanzania and Uganda. Science Lab Supplies is registered for GST (GSTIN 06ADEPJ0574F2ZU). Teachers and lab managers can ask for a price on the contact page, combine this flask with stands and condensers in the enquiry cart, or follow the lab tender page for school and college tenders.
Frequently Asked Questions
What are the dimensions of this flask?
The flask has a base diameter of 166 mm, a neck diameter of 50 mm and an overall height of 260 mm, with a rim finishing the narrow neck.
Why use a round bottom instead of a flat bottom flask?
A round bottom heats evenly and handles the stresses of boiling better than a flat base, which is why this shape suits heating, reflux and distillation work.
How is it closed or connected?
The narrow neck is finished with a rim, so it can be closed with a bung of matching size, which can be bored to carry a thermometer, delivery tube, thistle funnel or condenser.
Who supplies the Round Bottom Flask, Narrow Neck?
Schools and colleges can order it from Science Lab Supplies, an Ambala, India supplier that prepares quotations for a single demonstration flask, a full practical-lab quantity or a tender schedule.
Related Flasks and Heating Apparatus
These flasks, a thistle funnel, a condenser and a hot plate from the Laboratory Flasks, Laboratory funnel, Chemistry Lab and Physics Lab ranges cover wider necks, side-arm distillation, liquid addition, cooling and heating, so a chemistry lab can put its everyday boiling set-up on one quotation.
- Round Bottom Flask, Wide Neck — beaded rim, 105 mm diameter, 168 mm height, 50 mm neck.
- Distillation Flask — 7 mm or 9 mm side arm, 100 to 500 mL.
- Flask Pear Shape Single Neck — borosilicate, distils down to small bulk, 25 to 200 mL.
- Conical Flask — ground joint with hollow glass stopper, 64 to 166 mm in diameter.
- Thistle Funnel — 30 cm stem for adding liquid low down in a narrow-necked flask.
- Straight Cooler (Condenser) — Liebig-type condenser, 480 mm long, chemical and heat resistant.
- Electric Hot Plate — 150 mm round plate, 50–320 °C, 220–230 V.
Browse the full Laboratory Flasks range, the Chemistry Lab range for condensers and distilling sets, or all school lab equipment.
Last updated: 22 October 2026
