Beschrijving
Round-bottom flask 4000 ml three necks is a multi-neck laboratory flask with a centre neck NS 45/40 and two side necks NS 29/32 angled at 20°. Made from clear borosilicate glass 3.3, it combines high chemical resistance with good thermal shock performance for demanding laboratory work. The 4 l nominal volume and three-neck configuration support simultaneous attachment of condensers, addition funnels, thermometers or stirrers, making the vessel suitable for distillation, reflux, synthesis and collection duties. Supplied as a single piece with a net weight of 1,1 kg, this flask from manufacturer Witeg fits standard ground-joint assemblies and is widely used in organic chemistry, preparative work and process development. The clear glass body allows easy visual monitoring of reactions and phase separations. Its robust construction and standardised joints ensure reliable, leak-tight connections in both research and routine laboratory environments.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Nominal volume: 4 l
- Number of necks: 3
- Centre neck: NS 45/40
- Side necks: NS 29/32 angled 20°
- Material: Borosilicate glass 3.3
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Questions about Round bottom flask 4000 ml three necks CN ST 45/40
What is this article?
Round bottom flask 4000 ml three necks CN ST 45/40 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Round-bottom flasks, inside Beakers & flasks, in Labmateriaal.
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 Labmateriaal.
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.