Conical Flask with Side Funnel (Erlenmeyer Bunsen) 250ml
Product Code : SCL-CL-11513
Conical Flask with Side Funnel (Erlenmeyer Bunsen) 250ml (SKU SCL-CL-11513) is a 250 ml Erlenmeyer flask with a side arm on the neck, the vessel known as a filter flask, Bunsen flask or Buchner flask. Connected to a vacuum source, it draws liquid quickly through a filter funnel in chemistry practicals at school, college and technician level. Science Lab Supplies prepares quotations for it in Ambala, India, and dispatches to schools, colleges, training institutes, tender contractors and distributors.
Specifications
The specification table for this side-arm filter flask gives one fact per row. In short, it is a 250 ml conical Erlenmeyer body with a glass side funnel, or side arm, joined near the neck: the arm takes vacuum tubing, the mouth takes a stoppered filter funnel, and the glass is chemical and heat resistant.
| Specification | Value |
|---|---|
| SKU | SCL-CL-11513 |
| Also known as | Filter flask, Bunsen flask, Buchner flask |
| Type | Erlenmeyer flask |
| Capacity | 250 ml |
| Side funnel | Glass side funnel (side arm) |
| Application | Vacuum filtration |
| Chemical resistance | Chemical resistant |
| Heat resistance | Heat resistant |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Erlenmeyer Bunsen Filter Flask 250ml
This filter flask is used for suction (vacuum) filtration: a Buchner funnel sits in the mouth, the side arm is connected to a pump, and the reduced pressure pulls the liquid through the filter paper. It is standard in Class 12 and B.Sc. organic preparations and in laboratory technician training.
- Class 12 chemistry: collecting crystals of prepared compounds on Filter Paper and washing them on the funnel.
- B.Sc. organic practicals: separating recrystallised products from their mother liquor quickly.
- Diploma and technician courses: assembling and operating a vacuum filtration set-up safely, with the flask held on a Laboratory Stand.
Clamp the flask to a stand while it is under vacuum, and do not heat it while it is evacuated.
Standard Scope of Supply
The Conical Flask with Side Funnel (Erlenmeyer Bunsen) 250ml is supplied as a single flask with its glass side arm, as described above. A Buchner funnel, a bored rubber stopper, vacuum tubing and a pump are needed to complete the filtration assembly and can be added to the same quotation.
Packing, MOQ and Lead Time
Quotations are prepared for any quantity, from one filter flask to a set for each workbench. Science Lab Supplies states the packing, delivery time and price for the number you request, and the funnels, stoppers and tubing that complete each filtration station can be quoted alongside.
Science Lab Supplies has an Importer-Exporter Code and can ship to buyers in Saudi Arabia, Oman, the Philippines, Nepal, Bangladesh and Zambia. Filtration stations can be priced by adding the items to the enquiry cart or describing them on the contact page; the lab tender page sets out how tender enquiries work.
Frequently Asked Questions
What is the side funnel on this flask for?
The side funnel is a short side arm that connects the flask to a vacuum pump or water aspirator through rubber tubing, so the air inside can be drawn out during filtration.
Is a Buchner funnel included?
No. The flask is supplied on its own. Order a Buchner funnel and a bored rubber stopper that fits the mouth, and both can be quoted together with the flask on one quotation.
Who supplies this Erlenmeyer Bunsen flask?
Science Lab Supplies, working out of Ambala, India, is the supplier. It quotes institutions, contractors and distributors directly and can add the funnel, stopper and tubing for each filtration station to the same document.
Is vacuum filtration safe for students?
Yes, under supervision. Clamp the flask, wear eye protection, release the vacuum before switching off the pump, and inspect the glass for cracks or chips before every use.
Related Vacuum Filtration Equipment
A filter flask works only as part of a complete suction filtration set-up. The Chemistry Lab, Laboratory Flasks and Laboratory funnel items below supply the funnel, seal, tubing and vacuum source, so a teacher can order everything needed for the practical in one quotation.
- Vacuum Filtration Funnel (Buhner Funnel) — 120 ml porcelain Buchner funnel for vacuum filtration.
- Rubber Stoppers of Various Diameters with Holes — bored round stoppers with 11, 13, 14 and 15 mm bottom diameters.
- Rubber Tube (Laboratory) — natural rubber hose, 9 mm outer and 6 mm inner diameter.
- Equipment for Vacuum Filtration — set with a side-funnel conical flask, porcelain Buchner funnel, water pump and tubing.
- Vacuum Pump Filter — extruded brass pump that creates a vacuum as water passes through.
- Flask Filter — heavy-wall filter flask with glass connector, 100 to 5000 ml.
- Buchner Funnel Fritted Disc — thick-wall funnel with coarse, medium or fine porosity.
Browse the full Chemistry Lab range, the Laboratory funnel range, or all school lab equipment.
Last updated: 9 October 2026
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