Description
Double neck round flask, DURAN®, 250 ml is a laboratory glass flask intended for chemical reactions, distillations and multi-neck apparatus that require two independent ground-joint ports. It provides a centre neck NS 29/32 together with a parallel side neck NS 14/23, allowing simultaneous connection of condensers, addition funnels or temperature probes while the round bottom promotes uniform heat transfer and stirring. Fabricated from DURAN® glass and supplied as one piece weighing 0,110 kg, the vessel fits routine preparative organic work, solvent recovery and instructional laboratories that rely on interchangeable NS joints. The parallel orientation of the side neck helps keep the setup compact on the bench or inside a heating mantle. Available from manufacturer Lenz within the round-flask product family, this 250 ml format balances working volume with manageable size for medium-scale syntheses, reflux and inert-gas operations. Clear glass walls support continuous visual monitoring of the reaction mixture throughout the process.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc(s)
- Product type: Double neck round flask
- Glass type: DURAN®
- Capacity: 250 ml
- Centre neck: NS 29/32
- Side neck: parallel NS 14/23
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Questions about Double neck round flask, DURAN®, 250 ml, side neck parallel NS 14/23, 1 unit(s)
What is this article?
Double neck round flask, DURAN®, 250 ml, side neck parallel NS 14/23, 1 unit(s) is the article on this page. Luminix Health distributes Lenz for laboratory use. It sits in Round-bottom flasks, inside Beakers & flasks, in Labware.
A round-bottom flask is the heating flask of a distillation or a reflux. The curved wall takes the heat, and the ground neck connects to a still head or a condenser. The joint size, not only the volume, has to match the rest of the set.
A beaker is an open working vessel: easy to pour, poor as a measure. An Erlenmeyer flask has a flat base and a conical wall so a liquid can be swirled without climbing out. A round-bottom flask is for heating under a condenser, because the heat meets a curved wall and the joint at the neck connects to the rest of the glassware. Borosilicate is the glass that survives the temperature change. These forms are listed under ISO laboratory glassware.
Which category should I open next?
The category is Beakers & flasks. The sub-category is Round-bottom flasks. The catalogue is Labware.
Shelves beside this one are Beakers, Erlenmeyer flasks, Reaction vessels & jacketed vessels, Flat-bottom flasks, Flasks (other) and Beaker & flask accessories.
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
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Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.