Description
Double neck round flask, DURAN®, 2000 ml is a two-litre round-bottom laboratory vessel with dual ground-glass necks for larger-scale multi-connection work. The centre neck is NS 29/32 and the parallel side neck is NS 14/23, so a primary condenser or large adapter can occupy the centre while a smaller addition funnel, gas inlet or sensor uses the side port. Made from DURAN® glass, the flask serves synthesis, reflux, distillation and solvent-handling tasks that require greater working volume together with standard joint compatibility. The 2000 ml capacity is appropriate for preparative batches, scale-up trials and teaching demonstrations where clear observation of the contents remains essential. Delivered as a single unit from manufacturer Lenz, the flask weighs 0,506 kg and fits existing NS ground-joint systems. Parallel side-neck layout keeps the apparatus footprint manageable on the bench or heating mantle despite the larger body. Well suited to organic and general laboratory workflows that combine heating, stirring, controlled addition and inert atmosphere on a two-litre scale.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Product type: Double neck round flask
- Glass type: DURAN®
- Capacity: 2000 ml
- Centre neck: NS 29/32
- Side neck: NS 14/23, parallel
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Questions about Double neck round flask, DURAN®, 2000 ml, side neck parallel NS 14/23, 1 unit(s)
What is this article?
Double neck round flask, DURAN®, 2000 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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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.