Description
Double neck round flask, DURAN®, 1000 ml is a laboratory round-bottom flask with matched dual necks for simultaneous connection of standard ground-joint accessories. Both the centre neck and the parallel side neck are finished to NS 29/32, giving identical joint sizes for condensers, dropping funnels, gas adapters or temperature probes in multi-component setups. Produced in DURAN® glass, the flask is suited to synthesis, reflux, distillation and general preparative chemistry where robust joint geometry and optical clarity are important. The one-litre volume accommodates medium-scale reactions and solvent work common in research and teaching laboratories. Supplied as one piece from manufacturer Lenz, it weighs 0,340 kg and couples directly to NS 29/32 glassware already in use. Parallel orientation of the side neck helps keep assemblies compact on the bench or in a heating mantle, while the round body promotes even heating and efficient mixing. A practical choice whenever two full-size NS 29/32 ports are needed on a single 1000 ml round flask.
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: 1000 ml
- Centre neck: NS 29/32
- Side neck: NS 29/32, parallel
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Questions about Double neck round flask, DURAN®, 1000 ml, side neck parallel NS 29/32, 1 unit(s)
What is this article?
Double neck round flask, DURAN®, 1000 ml, side neck parallel NS 29/32, 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.