Description
Round-bottom flask 250 ml NS 19/26 Economy is a clear borosilicate glass 3.3 flask intended for distillation, reflux, reaction and collection duties in the laboratory. It offers a nominal capacity of 250 ml, an outer diameter of 85 mm and a height of 140 mm, so it fits standard heating mantles, rings and clamps. The ground joint NS 19/26 ensures a secure connection to condensers, adapters and complementary jointed glassware. Manufactured from borosilicate glass 3.3 as clear glass, the vessel provides chemical durability and thermal shock resistance suited to everyday heating and cooling cycles, with full visual access to the contents. This Economy line item from manufacturer Witeg is supplied in packs of 10 pieces and is a practical choice for teaching laboratories, preparative chemistry and general synthesis where reliable single-neck round-bottom flasks are required. Typical uses include distillation flask, receiver and reaction vessel roles within ground-joint assemblies. Net weight is about 0,118 kg per piece. Ideal wherever durable NS 19/26 round-bottom glassware is needed on the bench.
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: 250 ml
- Joint size: NS 19/26
- Outer diameter: 85 mm
- Height: 140 mm
- Material: Borosilicate glass 3.3
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Questions about Round bottom flask 250 ml ST 19/26 Economy
What is this article?
Round bottom flask 250 ml ST 19/26 Economy 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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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.