Description
Three-necked round-bottom flask, DURAN®, is a 250 ml laboratory vessel with centre neck 29/32 and side necks 29/32. The round-bottom geometry and three ground-glass necks support multi-port setups typical of preparative chemistry, where condensers, addition funnels, stirrers or temperature probes can be connected at the same time. DURAN® glass gives the flask the thermal and chemical durability expected for heating, cooling and solvent work on the bench. Joint size is uniform at 29/32 on the centre and both side necks, so standard NS 29/32 components mate directly without adapters. The unit is supplied as 1 pc and weighs 0,390 kg, making it a practical single-vessel option for synthesis, reflux and related laboratory procedures. This flask from manufacturer Lenz sits in the round-flask and ground-joint glassware category used throughout research, teaching and quality-control laboratories. Clear capacity and joint marking help with inventory matching and apparatus planning. The three-neck layout keeps the working volume accessible while maintaining a compact footprint on a heating mantle or stand.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Product type: Three-necked round-bottom flask
- Material: DURAN®
- Capacity: 250 ml
- Centre neck: 29/32
- Side necks: 29/32
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Questions about Three-necked round-bottom flask, DURAN®, 250 ml, side necks 29/32, centre 29/32
What is this article?
Three-necked round-bottom flask, DURAN®, 250 ml, side necks 29/32, centre 29/32 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.