Dropping Funnel Pear Shape PTFE Stopcock
Product Code : LSK-LF-10392
Dropping Funnel Pear Shape PTFE Stopcock (SKU LSK-LF-10392) is a pear-shaped addition funnel with a drip stem and a PTFE stopcock, used to feed a liquid into a reaction flask a few drops at a time. It suits controlled additions in college organic practicals, senior-school chemistry demonstrations and research work. From Ambala, India, Science Lab Supplies can quote this funnel for universities, schools, tender contractors and distributors as part of its chemistry lab equipment in India.
Specifications
The table below gives each specification of the pear-shaped PTFE dropping funnel. In short, its pear-shaped body narrows into a drip stem, the flow is set by a PTFE stopcock with a 2.5 mm or 4 mm bore, capacities run from 50 ml to 500 ml, and a stem-inside-cone version can be ordered.
| Specification | Value |
|---|---|
| SKU | LSK-LF-10392 |
| Body shape | Pear shape |
| Stem | Drip stem |
| Stopcock type | PTFE |
| Stopcock bore | 2.5 mm or 4 mm |
| Capacities | 50 ml, 100 ml, 250 ml, 500 ml |
| Stem option | Available with stem inside cone |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Dropping Funnel Pear Shape
A dropping funnel lets one reagent be added to another slowly and at a steady rate, which keeps heat-releasing reactions under control. The pear-shaped model suits B.Sc. and M.Sc. organic practicals, pharmacy and chemical-engineering lab courses, and teacher demonstrations in Class 11–12 chemistry.
- B.Sc. organic chemistry: dropwise addition of a reagent into a Round Bottom Flask, Narrow Neck during a preparation.
- Class 11–12 chemistry: demonstrating controlled addition, with the funnel held on a stand by a Three Prong Glassware Holding Clamp.
- Pharmacy and chemical-engineering labs: feeding a reactant into a flask under a condenser.
- Adding liquid low down in a flask where a drip stem is too short, a job for the 30 cm stem of the Thistle Funnel.
Choose the 2.5 mm bore for fine drop control and the 4 mm bore where a faster flow is wanted.
Standard Scope of Supply
Each dropping funnel is supplied as a single unit with its drip stem and fitted PTFE stopcock, in the capacity and bore you order. The stem-inside-cone version is a separate option, so name it on your enquiry. Clamps, stands and reaction flasks can be added to the same quotation if needed.
Packing, MOQ and Lead Time
Quotations can be prepared for a single funnel or for a full set of sizes for an organic chemistry laboratory. Each one lists the packing, delivery time and price for your quantity, and flasks, separating funnels or other glassware can be added to the same quotation.
Holding an Importer-Exporter Code as a registered exporter, Science Lab Supplies can ship to buyers in Oman, the Philippines, Nepal, Bangladesh, Zambia and Rwanda. Science Lab Supplies is registered for GST (GSTIN 06ADEPJ0574F2ZU). For a price on the size and bore you need, describe the requirement on the contact page, place the funnel in the enquiry cart, or turn to the lab tender page when buying through a formal bid.
Frequently Asked Questions
What is a pear-shaped dropping funnel used for?
It adds a liquid reagent to a reaction flask slowly and in controlled drops, so the rate of reaction and the heat released stay manageable during a preparation.
Which bore sizes and capacities are available?
The funnel comes with a 2.5 mm or 4 mm stopcock bore and in 50 ml, 100 ml, 250 ml and 500 ml capacities. State both on your enquiry so the quotation matches your setup.
Why a PTFE stopcock?
A PTFE key turns smoothly without grease, so no grease can dissolve into the solvent or contaminate the product being added, and the chosen bore of 2.5 mm or 4 mm then sets the drop rate.
Who supplies the Dropping Funnel Pear Shape PTFE Stopcock?
This funnel comes from Science Lab Supplies in Ambala, India, which can quote it for universities, schools, training institutes and tender contractors together with flasks and other glassware for the same organic chemistry bench.
Related Funnels and Reaction Flasks
These funnels and flasks cover the other addition, separation and reaction steps of an organic chemistry bench. The cylindrical dropping funnels offer different stopcocks, the pressure-equalising funnel suits closed apparatus, and the pear-shaped flasks take the liquid being added. Any of them can go on the same quotation.
- Dropping Funnel Cylindrical, PTFE Stopcock — cylindrical body with a PTFE stopcock in 2.5, 4 or 6 mm bore, up to 1000 ml.
- Dropping Funnel Cylindrical, Needle Valve Stopcock — needle valve stopcock, available with a PE stopper.
- Dropping Funnel Cylindrical, Solid Glass Stopcock — solid glass stopcock, 50 ml to 1000 ml.
- Pressure Equalising Funnels Pear shape — PTFE key stopcock with a 24/29 or 19/26 socket.
- Separating Funnel Pear shape — needle valve, PTFE or solid glass stopcock, 50 ml to 2000 ml.
- Flask Pear Shape Single Neck — borosilicate flask for semi-micro distillation, 14/20 or 24/40 socket.
- Flask Pear shape with Two Neck — borosilicate flask with its side neck at 25°.
Browse the full Laboratory funnel range, the Laboratory Flasks range, or all school lab equipment.
Last updated: 9 October 2026
