Round Bottom Flask With Two Neck Manufacturer,Supplier and Exporter in India

Round Bottom Flask With Two Neck (Product Code: SLE/GFL/15) is a graduated borosilicate flask with two necks finished as standard taper joints, so a condenser and a second fitting — a thermometer, dropping funnel or gas inlet — can be connected at the same time without corks. It is the working vessel for reflux reactions, controlled additions and distillations where the temperature of the contents must be watched. Chemistry departments, pharmacy colleges and research labs buy it from Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, alongside the rest of their borosilicate laboratory glassware.

Specifications

Typical Use

A typical set-up places the flask in a heating mantle, fits a Liebig condenser or reflux condenser to one neck and uses the other for a thermometer that dips into the reaction mixture, or for a dropping funnel that feeds in a reagent while the mixture refluxes. Because the connections are ground-glass standard taper joints, the assembly is sealed against vapour leaks and can be taken apart and rebuilt quickly between practical sessions.

The six capacities let a department standardise on one design: 50 ml and 100 ml flasks for student preparations, 250 ml and 500 ml for routine synthesis, and 1000 ml or 2000 ml for demonstrations and scale-up. Apply a thin film of joint grease or use a PTFE sleeve to stop joints seizing, clamp the flask at the neck carrying the condenser, and never heat the apparatus as a closed system.

Manufacturer

The flask is manufactured by Jain Scientific Equipments Private Limited, trading as ScienceLab, an Ambala, Haryana company making glassware and laboratory apparatus. For institutional buyers completing vendor registration, the company’s GSTIN is 06AAECJ8618A1ZT and its LEI is 3358004HRD1JIVXKYX49. Read more on our company profile.

Related Laboratory Equipment

Items used with a two-neck flask to complete a reflux or addition set-up:

• Digital Heating Mantle With Stirrer — heats the flask while stirring its contents
• Liebig Condenser — mounts on one neck for reflux or distillation
• Thermometer Clamp — steadies the thermometer in the second neck
• Boss Head — attaches flask and condenser clamps to the stand rod
• Pear Shaped Flask with Two Neck — a two-neck option for microscale work

See the complete Glassware Flasks line-up for single-neck and wide-neck alternatives.

Frequently Asked Questions

What is the second neck used for?
Usually for a thermometer, a dropping funnel or a gas inlet, while the other neck carries the condenser. This lets you monitor or feed the reaction without dismantling the apparatus.

What joint sizes do the necks have?
The necks are standard taper joints; the exact size for each capacity is not given in our current listing. Please contact us with the joint size of your condenser and we will confirm the match.

Which capacities can I order?
50 ml, 100 ml, 250 ml, 500 ml, 1000 ml and 2000 ml.

Do the joints need grease?
For most reflux work a very thin film of joint grease or a PTFE sleeve is recommended, especially with alkaline mixtures that can cause ground joints to stick.

Do you supply against tenders and purchase orders?
Yes. Send the tender or purchase reference, sizes and quantities, and we will provide a quotation together with the vendor details you need.

Is export supply possible?
Yes, we supply institutions and distributors in India and international markets; packing and shipping terms are confirmed in the quotation.

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Last updated: 24 September 2026