Description
Two-necked pear-shaped flask 25 ml, DURAN® is a compact borosilicate laboratory flask configured with a centre neck NS 14/23 and a side neck NS 14/23 for multi-port reaction and distillation setups. The pear-shaped body concentrates small working volumes at the base, which is useful for micro-scale synthesis, solvent concentration and controlled reagent addition under ground-joint glassware assemblies. Both necks share the NS 14/23 standard, simplifying the choice of stoppers, condensers, dropping funnels and adapters within a single joint size. Manufactured in DURAN® glass and supplied by manufacturer Lenz, the flask suits teaching laboratories as well as research benches where chemical resistance and thermal stability of borosilicate glass are required. The vessel is supplied as one piece with a net weight of 0,050 kg, convenient for individual workstation kits or spare stock. Typical applications include small-volume reflux, inert-gas blanketing via the side neck, and parallel observation of reactions while reagents are introduced through the second joint. Clear joint designation supports reproducible apparatus planning in organic and analytical workflows.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Product type: Two-necked pear-shaped flask
- Capacity: 25 ml
- Material: DURAN® glass
- Centre neck: NS 14/23
- Side neck: NS 14/23
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Questions about Two-necked pear shaped fl., 25ml, DURAN®, Centre neck NS 14/23
What is this article?
Two-necked pear shaped fl., 25ml, DURAN®, Centre neck NS 14/23 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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.