Description
Two-necked pear-shaped flask 25 ml, DURAN® combines a centre neck NS 19/26 with a side neck NS 14/23, giving laboratories mixed joint sizes on a compact pear-shaped body. The larger centre joint accommodates bulkier condensers, stirrer guides or larger adapters, while the NS 14/23 side neck remains ideal for gas inlets, thermometers or addition funnels. With a 25 ml working capacity, the flask is well suited to micro- and semi-micro preparative work, solvent recovery and small-scale reactions that benefit from a pear geometry concentrating liquid at the bottom. DURAN® borosilicate construction provides the chemical and thermal performance expected of standard laboratory glassware. This configuration from manufacturer Lenz is supplied as a single piece weighing 0,050 kg, making it practical to hold as a dedicated vessel for specific joint combinations. Users can build compact multi-neck assemblies without forcing mismatched adapters on every port. The design supports organic synthesis, teaching demonstrations and analytical sample preparation wherever dual access and a modest volume are required.
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 19/26
- Side neck: NS 14/23
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Questions about Two-necked pear shaped fl., 25ml, DURAN®, Centre neck NS 19/26
What is this article?
Two-necked pear shaped fl., 25ml, 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.