Description
Two-necked pear-shaped flask, 50 ml, DURAN® is a compact laboratory vessel designed for preparative and synthetic work that benefits from a pear-shaped body and dual ground-glass necks. The centre neck is finished as NS 19/26 and the side neck as NS 14/23, allowing simultaneous connection of condensers, dropping funnels, thermometers or gas inlets while keeping the reaction volume modest. The pear geometry concentrates the liquid at the base, which supports efficient stirring and heat transfer in small-scale distillations, reflux setups and multi-step organic reactions. Manufactured from DURAN® glass by Lenz, the flask offers the chemical resistance and thermal stability expected of standard laboratory borosilicate ware for everyday bench use. Supplied as a single piece weighing 0,055 kg, it fits standard jointed glassware trains and is suitable for teaching laboratories as well as research environments where space-efficient multi-neck vessels are required. Clear joint sizing simplifies apparatus planning and interchange with other NS components.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc(s)
- Capacity: 50 ml
- Material: DURAN®
- Centre neck: NS 19/26
- Side neck: NS 14/23
- Design: Two-necked pear-shaped
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Questions about Two-necked pear shaped fl., 50ml, DURAN®, Centre neck NS 19/26
What is this article?
Two-necked pear shaped fl., 50ml, DURAN®, Centre neck NS 19/26 is the article on this page. Luminix Health distributes Lenz for laboratory use. It sits in Round-bottom flasks, inside Beakers & flasks, in Matériel de laboratoire.
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 Matériel de laboratoire.
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.