Description
DURAN® two-neck round-bottom flask with standard ground joints delivers a 250 ml nominal volume, center neck NS 24/29 and angled side neck NS 14/23. Constructed from borosilicate glass 3.3, the flask is suited to distillation, fractionation and reaction applications that call for the simultaneous mounting of condensers, columns, thermometers, dropping funnels or boiling capillaries. Its angled side neck and round-bottom form enable even heat transfer in heating baths or mantles. Precision ground joints create a tight seal, while the permanently fired white marking withstands repeated laboratory handling. The vessel is also appropriate for extraction and for linking to further glass apparatus. This single unit from manufacturer Duran/DWK Life Sciences belongs to the multi-neck series valued for versatile experimental layouts. Although the 250 ml size with these joint combinations is not produced to DIN ISO, it remains a dependable choice for preparative and synthetic work requiring secure multi-port access.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Storage temperature: Standard
- Material: Borosilicate glass 3.3
- Nominal volume: 250 ml
- Center neck: NS 24/29
- EAN: 4032051027107
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Questions about DURAN® Twin-Neck Round Bottom Flask, standard ground joint, angled side neck
What is this article?
DURAN® Twin-Neck Round Bottom Flask, standard ground joint, angled side neck is the article on this page. Luminix Health distributes DWK Life Sciences 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?
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.