Description
Double neck round flask, DURAN®, 500 ml is a laboratory round-bottom vessel with two ground-glass necks for multi-connection work in synthesis, reflux and distillation setups. The centre neck is finished to NS 29/32 and the side neck runs parallel, also NS 29/32, so condensers, dropping funnels, gas inlets or temperature sensors can be fitted at the same time without crowding the joint area. Made from DURAN® glass, the flask offers the clarity and thermal behaviour expected of standard laboratory round flasks with ground joints. The 500 ml working volume suits preparative reactions, solvent handling and teaching experiments where moderate scale and reliable joint geometry matter. Supplied as one piece from manufacturer Lenz, the flask weighs 0,217 kg and integrates directly with common NS 29/32 glassware. Parallel side-neck orientation keeps assemblies compact on the bench or in a heating mantle, while the round body supports even heat distribution and stirring. Ideal for organic and general chemistry workflows that require simultaneous addition, inert atmosphere or continuous monitoring through standard ground joints.
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: 500 ml
- Centre neck: NS 29/32
- Side neck: NS 29/32, parallel
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Questions about Double neck round flask, DURAN®, 500 ml, side neck parallel NS 29/32, 1 unit(s)
What is this article?
Double neck round flask, DURAN®, 500 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.