Description
Kjeldahl flask 500 ml DURAN® is a laboratory digestion flask intended for nitrogen determination and other acid-digestion procedures that benefit from a larger working volume. Produced in DURAN® glass (borosilicate glass 3.3), it offers the chemical and thermal resistance expected for boiling sulfuric acid digests and similar aggressive media. Nominal volume is 0,5 l. External dimensions are specified as flask outer diameter 101 mm, height 300 mm, and neck outer diameter 34 mm, supporting predictable fit in heating blocks, clamps, and distillation trains.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
The elongated neck typical of Kjeldahl geometry helps manage foam and spray during vigorous boiling. With a net weight of 0,173 kg, the flask remains manageable for routine handling while providing ample capacity for larger sample loads. Packaged as 10 pieces from manufacturer Witeg, it is suited to analytical, agricultural, and food laboratories that standardise on DURAN® borosilicate glassware. Clear dimensional data and defined material grade simplify replacement and method documentation where flask geometry influences heating profile and vapour path.
Key features
- Pack size: 10 pc(s)
- Nominal volume: 0,5 l
- Material: Borosilicate glass 3.3
- Glass: DURAN®
- Neck outer diameter: 34 mm
- Flask outer diameter: 101 mm
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Questions about Kjeldahl flasks 500 ml DURAN®
What is this article?
Kjeldahl flasks 500 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.
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