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 usually called 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 ships it from Ambala, India to schools, colleges, training institutes, tender contractors and distributors.
Specifications
The flask is a 250 ml conical Erlenmeyer body with a glass side funnel, or side arm, joined near the neck. The arm takes vacuum tubing, while the mouth takes a stoppered filter funnel. The description lists it for vacuum filtration and rates the glass as chemical resistant and heat resistant.
| Parameter | Value |
|---|---|
| SKU | SCL-CL-11513 |
| Also known as | Filter flask, Bunsen flask, Buchner flask |
| Capacity | 250 ml |
| Design | Erlenmeyer flask with glass side funnel (side arm) |
| Purpose | Vacuum filtration |
| Resistance | Chemical resistant, 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 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.
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 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. Your enquiry can start in the enquiry cart or on the contact page; tender details are on the lab tender page.
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 funnel is listed with the flask. Order a Buchner funnel and a bored rubber stopper that fits the mouth, and both can be quoted together with the flask.
Who supplies this Erlenmeyer Bunsen flask?
The flask comes from Science Lab Supplies in Ambala, India, which supplies laboratory glassware to institutions, contractors and distributors and quotes each order directly.
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 four Chemistry Lab items below supply the funnel, seal, tubing and a ready set, so a teacher can order everything needed for the practical in one quotation.
- Vacuum Filtration Funnel (Buhner Funnel) — sits in the mouth of the flask.
- Rubber Stoppers of Various Diameters with Holes — seals the funnel stem into the flask.
- Rubber Tube (Laboratory) — links the side arm to the vacuum source.
- Equipment for Vacuum Filtration — a listed set for the same practical.
Browse the full Chemistry Lab range or all school lab equipment.
Last updated: 25 September 2026
