Description
Round-bottom flask 2000 ml with two necks is a clear two-litre laboratory flask suited to larger-scale distillation, reaction and collection tasks. It features a centre neck NS 24/29 paired with an angled side neck at 20° finished NS 14/23, enabling concurrent connection of condensers, addition funnels or other ground-joint accessories. Fabricated from borosilicate glass 3.3, the vessel combines chemical durability with good resistance to thermal stress. Nominal volume is 2000 ml (2 l) and net weight is 0,53 kg, providing substantial working capacity while remaining manageable on standard supports. The angled side neck improves spatial arrangement of attached equipment around the round bottom and helps avoid interference. Applications include multi-neck reaction vessels, distillation setups and receiving flasks within conventional laboratory glassware trains. This configuration from manufacturer Witeg is produced as clear glass and belongs to the familiar groups of round-bottom flasks, ground-joint flasks, distillation flasks and receiving flasks used in preparative and organic chemistry laboratories.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Nominal volume: 2000 ml
- Number of necks: 2
- Centre neck: NS 24/29
- Side neck: NS 14/23 angled 20°
- Material: Borosilicate glass 3.3
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Questions about Round bottom flask 2000 ml two necks CN ST 24/29 +
What is this article?
Round bottom flask 2000 ml two necks CN ST 24/29 + 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.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.

