Description
Round-bottom flask 250 ml with two necks is a clear laboratory vessel fitted with a centre neck NS 29/32 and an angled side neck NS 19/26 at 20°. Made from borosilicate glass 3.3, it combines chemical resistance with good thermal stability for distillation, reaction and collection work. The nominal volume of 0,25 l suits medium-scale preparative and analytical procedures, while the net weight of 0,143 kg keeps the flask easy to handle on stands and rotary evaporators. The two-neck layout permits simultaneous attachment of condensers, dropping funnels or temperature probes; the angled side neck improves access and reduces clash between joints. This flask from manufacturer Witeg is supplied as a single piece and mates with standard ground-joint glassware used in organic synthesis, solvent recovery and sample concentration. Typical laboratory roles include distillation flask, ground-joint reaction flask and receiving flask in research, teaching and quality-control environments where reliable borosilicate performance is required.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Material: Borosilicate glass 3.3
- Centre neck: NS 29/32
- Side neck: NS 19/26 angled 20°
- Nominal volume: 0,25 l
- EAN: 4033378493514
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Questions about Round bottom flask 250 ml two necks CN ST 29/32 +
What is this article?
Round bottom flask 250 ml two necks CN ST 29/32 + 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.