Dropping Funnel Cylindrical, Needle Valve Stopcock
Product Code : LSK-LF-10389
Dropping Funnel Cylindrical, Needle Valve Stopcock (SKU LSK-LF-10389) is a cylindrical addition funnel whose outlet is controlled by a needle valve, giving fine, repeatable control of the drip rate when a reagent is added slowly to a reaction. It is offered in capacities from 50 mL to 1000 mL with three bore sizes and suits organic chemistry practicals in colleges, universities and pharmacy institutes. Science Lab Supplies accepts enquiries for it at Ambala, India, from colleges, institutes, tender contractors and distributors.
Specifications
Bore options, capacities and the stopper choice for the needle valve funnel are tabulated below. In short, the funnel has a cylindrical body and a needle valve stopcock with a 2.5 mm, 4 mm or 6 mm bore, can come with a PE stopper for the top, and is offered in five capacities from 50 mL to 1000 mL.
| Specification | Value |
|---|---|
| SKU | LSK-LF-10389 |
| Body shape | Cylindrical |
| Stopcock type | Needle valve |
| Bore options | 2.5 mm, 4 mm, 6 mm |
| Stopper | Available with PE stopper |
| Capacities | 50, 100, 250, 500, 1000 mL |
| Number of capacities | 5 |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Needle Valve Dropping Funnel
A dropping funnel sits on a reaction flask and releases a liquid reagent drop by drop, so that exothermic or fast reactions stay under control. The needle valve lets the operator set a slow, steady rate and leave it, which helps with long additions in synthesis and pharmaceutical chemistry labs.
- B.Sc. and M.Sc. organic chemistry: slow addition of reagents during nitration, bromination and similar preparations, with the funnel mounted above a Round Bottom Flask, Narrow Neck.
- B.Pharm pharmaceutical chemistry: dropwise addition in the synthesis of drug intermediates.
- Research labs: controlled-rate addition over long periods, with the assembly clamped to a Laboratory Retort Stand.
- Chemical engineering labs: feeding a reactant steadily into a batch reactor flask.
Standard Scope of Supply
The funnel is supplied as a single unit with its needle valve stopcock, in the capacity and bore you specify, and the PE stopper option is confirmed on the quotation. Reaction flasks, clamps and stands can be added to the same enquiry for a complete addition set-up.
Packing, MOQ and Lead Time
Ask for a quote for one dropping funnel or for enough to equip each synthesis bench. The quotation from Science Lab Supplies confirms packing, delivery time and price for that number, and flasks or other chemistry lab equipment can be quoted together.
With its Importer-Exporter Code, Science Lab Supplies is a registered exporter and can ship to buyers in Uganda, the UAE, Saudi Arabia, Oman, the Philippines and Nepal. Quote requests can go through the contact page with the capacity and bore you need, or via the enquiry cart; the lab tender page applies when the purchase is tendered.
Frequently Asked Questions
What does the needle valve add over a standard stopcock?
A needle valve opens gradually, so the flow can be set precisely and held at a steady drip. That makes slow, controlled additions easier than with a simple on/off key.
Which bore should I choose?
The 2.5 mm bore suits fine dropwise additions, 4 mm is a general choice, and 6 mm allows faster flow for larger volumes or more viscous liquids.
Who supplies the Dropping Funnel Cylindrical, Needle Valve Stopcock?
Colleges, research labs, contractors and distributors receive quotations for this funnel from Science Lab Supplies in Ambala, India, priced separately for each capacity and bore requested.
Is a stopper included?
The funnel is available with a PE stopper. Mention it in your enquiry and the quotation will show whether it is included for the capacity you choose.
Related Dropping Funnels, Separating Funnels and Reaction Flasks
Synthesis work can call for dropping funnels with other stopcocks or shapes, reaction flasks to receive the reagent and separating funnels for the work-up. The items below from the funnel range and the Laboratory Flasks range offer those alternatives and can be quoted alongside the needle valve model.
- Dropping Funnel Cylindrical, PTFE Stopcock — cylindrical dropping funnel with a PTFE stopcock in 2.5, 4 or 6 mm bore.
- Dropping Funnel Cylindrical, Solid Glass Stopcock — the same cylindrical design with a solid glass stopcock, 50 to 1000 ml.
- Dropping Funnel Pear Shape PTFE Stopcock — pear-shaped dropping funnel with a drip stem and PTFE stopcock, 50 to 500 ml.
- Pressure Equalising Funnels Pear shape — pear-shaped funnel with PTFE key stopcock and a 24/29 or 19/26 socket.
- Separating Funnel Cylindrical — cylindrical separating funnel with socket and cone, 50 to 1000 ml.
- Flask Reaction With Glass Stopcock — reaction flask with a 2 mm glass stopcock, in 50 mL (14/20) and 250 mL (24/40).
- Flask Pear shape with Two Neck — borosilicate two-neck flask with the side neck at 25°.
- Separatory Funnel Holder — polypropylene holder with a front opening for a clear view of the solution.
Browse the full Laboratory funnel range, the Laboratory Flasks range for reaction flasks, or all school lab equipment.
Last updated: 9 October 2026
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