Description
Round-bottom flask 250 ml with standard ground joint is a laboratory vessel of nominal volume 0,25 l manufactured from borosilicate glass 3.3. It features a short neck and an NS 29/32 ground joint socket produced in accordance with DIN EN ISO 4797, ensuring dimensional consistency and reliable interchangeability with matching glassware. The round-bottom geometry supports uniform heat distribution during distillation, reflux and reaction work, while the chemically resistant borosilicate construction withstands common laboratory solvents and thermal cycling. Packed as 10 pieces in cartons, the flasks are practical for routine stocking in research, teaching and quality-control laboratories. These items from manufacturer Marienfeld serve equally well as distillation flasks, receiving flasks or general ground-joint reaction vessels. The short-neck design simplifies connection of condensers, adapters and stoppers, and the standardised NS 29/32 joint promotes leak-free assemblies across multi-piece apparatus. Suitable for heating mantles, oil baths and rotary evaporators, the flask combines mechanical robustness with optical clarity for visual process monitoring.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 10 pc(s)
- Nominal volume: 0,25 l
- Ground joint: NS 29/32
- Material: Borosilicate glass 3.3
- Neck type: Short neck
- EAN: 4250317311580
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Questions about Boiling flasks 250 ml with round bottom and ground joint
What is this article?
Boiling flasks 250 ml with round bottom and ground joint is the article on this page. Luminix Health distributes Marienfeld 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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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.