Flask Reaction With Glass Stopcock
Product Code : LSK-LF-10420
Flask Reaction With Glass Stopcock (SKU LSK-LF-10420) is a ground-joint reaction flask fitted with a 2 mm glass stopcock held by a spring retention device, so the tap turns smoothly and stays seated. It comes in 50 mL with a 14/20 socket and 250 mL with a 24/40 socket, and it suits postgraduate and research synthesis that must be kept closed or connected to a gas or vacuum line. Universities, colleges, tender contractors and distributors can order it through Science Lab Supplies, which quotes and dispatches it from Ambala, India.
Specifications
Both sizes of this stopcock reaction flask are broken down row by row below. In short, a standard ground-glass socket at the neck accepts condensers, adapters or stoppers, a 2 mm glass stopcock lets the flask be closed off, and a spring retention device keeps the stopcock key from working loose.
| Specification | Value |
|---|---|
| SKU | LSK-LF-10420 |
| Neck | Ground-glass socket |
| 50 mL version | Socket size 14/20 |
| 250 mL version | Socket size 24/40 |
| Stopcock material | Glass |
| Stopcock size | 2 mm |
| Stopcock retention | Spring retention device |
| Retention purpose | Smooth turning of the stopcock |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Reaction Flask with Stopcock
The stopcock lets the flask be closed off, evacuated or flushed with gas through tubing while the neck carries a condenser or stopper. That makes this reaction flask useful chemistry lab equipment in India for syntheses that must be kept sealed or run under a controlled atmosphere.
- M.Sc. and research organic and inorganic synthesis where the vessel is connected to a gas line or to a Vacuum Pressure Pump.
- Holding small quantities of a reaction mixture or solution under a closed stopcock between steps.
- B.Tech. chemical engineering and B.Pharm. labs assembling ground-joint glassware set-ups, joined through an Adapter (Alunge) where needed.
Support the flask on a Laboratory Retort Stand, turn the stopcock gently and never force it; if it resists, release the retention spring and clean the key before refitting.
Standard Scope of Supply
Each reaction flask is supplied with its 2 mm glass stopcock and spring retention device fitted, in the 50 mL (14/20) or 250 mL (24/40) size you order. Stoppers, condensers and tubing can be added to the quotation as optional accessories when a complete set-up is wanted.
Packing, MOQ and Lead Time
A quotation can cover one reaction flask for a research group or several of each size for a teaching lab; it sets out packing, delivery time and price for the quantity requested. Other ground-joint flasks and funnels can go on the same quotation.
Science Lab Supplies, a registered exporter with an Importer-Exporter Code, is able to ship to buyers in South Africa, Qatar, Sri Lanka, Vietnam, Malaysia and Peru. Science Lab Supplies is registered for GST (GSTIN 06ADEPJ0574F2ZU). For a price on either size, message the team from the contact page, collect your synthesis glassware in the enquiry cart, or read the lab tender page before a tender submission.
Frequently Asked Questions
What does the spring retention device do?
It holds the glass stopcock key in its barrel so the tap turns smoothly and cannot slip out when the flask is moved, clamped or connected to tubing, which keeps the closed flask reliably sealed.
Which sizes are available?
Two versions are offered: 50 mL with a 14/20 socket and 250 mL with a 24/40 socket. Choose the socket that matches the condenser, adapter or stopper already on your bench.
Who supplies the Flask Reaction With Glass Stopcock?
Research groups and teaching labs can obtain it from Science Lab Supplies, an Ambala, India supplier that quotes anything from a single flask to a full tender quantity of both sizes.
Can it be quoted with other ground-joint glassware?
Yes. List the flasks, funnels and adapters you need in one enquiry and they will be priced together on a single quotation, with packing and delivery time stated for the whole set.
Related Reaction Flasks and Addition Funnels
These flasks, funnels and accessories from the Laboratory Flasks, Laboratory funnel and Chemistry Lab ranges add other shapes and capacities, controlled liquid addition and vacuum, so a synthesis lab can order its whole set of reaction glassware on one quotation.
- Round Bottom Flask, Narrow Neck — rimmed narrow neck of 50 mm diameter, 260 mm high.
- Flask Pear Shape Single Neck — 25 to 200 mL with a 14/20 or 24/40 socket, for semi-micro distillation.
- Flask Pear shape with Two Neck — borosilicate, 100 mm overall height, side neck at 25°.
- Pressure Equalising Funnels Pear shape — PTFE key stopcock, 19/26 or 24/29 socket, 100 to 500 ml.
- Dropping Funnel Pear Shape PTFE Stopcock — drip stem, 2.5 mm or 4 mm bore, 50 to 500 ml.
- Hand Vacuum Pump with Pressure Gauge — 15 ml per stroke, gauge in centimetres and inches of mercury, release valve.
- Liebig Condenser 200mm — 200 mm jacket length in borosilicate glass.
Browse the full Laboratory Flasks range, the Laboratory funnel range for dropping and pressure-equalising funnels, or all school lab equipment.
Last updated: 22 October 2026
