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. College organic labs, senior-school chemistry teachers and research technicians use it for controlled additions. Science Lab Supplies supplies this funnel from Ambala, India to schools, colleges, training institutes, tender contractors and distributors as part of its chemistry lab equipment in India.
Specifications
The funnel has a pear-shaped body that narrows into a drip stem, with the flow set by a PTFE stopcock. It is listed with a 2.5 mm or 4 mm bore, in four capacities from 50 ml to 500 ml, and a version with the stem inside a cone is also offered.
| Parameter | Value |
|---|---|
| SKU | LSK-LF-10392 |
| Shape | Pear shape, drip stem |
| Stopcock | PTFE |
| Bore | 2.5 mm or 4 mm |
| Capacity | 50, 100, 250, 500 ml |
| Option | Stem inside cone |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Dropping Funnel Pear Shape
A dropping funnel lets the user add one reagent 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 during a preparation.
- Class 11–12 chemistry: demonstrating controlled addition to a reaction flask.
- Pharmacy and chemical-engineering labs: feeding a reactant into a flask under a condenser.
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 are not part of the item.
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). To ask for a quote, write to us on the contact page, add the item to the enquiry cart, or read about bulk supply on the lab tender page.
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 is listed with a 2.5 mm or 4 mm stopcock bore and in 50 ml, 100 ml, 250 ml and 500 ml capacities. State both when you ask for a quotation.
Why a PTFE stopcock?
A PTFE key turns without grease, so no grease can dissolve into the solvent or contaminate the product being added.
Who supplies the Dropping Funnel Pear Shape PTFE Stopcock?
Science Lab Supplies, based in Ambala, India, supplies it to schools, universities, training institutes and tender contractors, and quotes it with related glassware for the same lab.
Related Laboratory Funnels
These funnels cover the other addition and separation tasks of an organic chemistry bench. The cylindrical dropping funnels offer a different body shape and stopcock, the pressure-equalising funnel suits closed apparatus, and the pear separating funnel handles extraction once the reaction is complete.
- Dropping Funnel Cylindrical, PTFE Stopcock — cylindrical addition funnel.
- Dropping Funnel Cylindrical, Needle Valve Stopcock — needle valve flow control.
- Pressure Equalising Funnels Pear shape — for closed reaction setups.
- Separating Funnel Pear shape — separating immiscible liquids.
Browse the full Laboratory funnel range or all school lab equipment.
Last updated: 25 September 2026
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