Description
Round-bottom flask, wide neck, 250 ml, DURAN® is a single-neck laboratory flask fabricated from borosilicate glass 3.3 for medium-scale preparative and analytical work. The flask has a nominal volume of 250 ml and a wide neck with beaded rim that simplifies charging, sampling and cleaning between runs. Neck outer diameter measures 51 mm, body outer diameter 85 mm and height 143 mm, giving a balanced profile for stands, heating mantles or water baths. The round bottom promotes even thermal contact during heating, concentration or mild reflux procedures. Supplied as a pack of 10 pieces, this DURAN® item from manufacturer Witeg fits reaction, distillation and collection workflows in industrial, academic and control laboratories. Borosilicate glass 3.3 offers reliable resistance to thermal stress and common laboratory chemicals. Clear walls enable straightforward observation of mixtures, precipitates and colour changes. The wide-neck format is advantageous when larger funnels, stirrers or spatulas must pass freely into the vessel. Net weight is 0,14 kg per flask, combining manageable handling with a stable base geometry for clamped setups.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 10 pc(s)
- Brand: DURAN®
- Nominal volume: 250 ml
- Material: Borosilicate glass 3.3
- Neck type: Wide neck, beaded rim, 1 neck
- Dimensions: neck A.Ø 51 mm, A.Ø 85 mm, height 143 mm
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Questions about Flask round bottom wide neck 250 ml DURAN®
What is this article?
Flask round bottom wide neck 250 ml DURAN® is the article on this page. Luminix Health distributes Witeg 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.