Description
Round-bottom flask 2000 ml with two necks is a clear-glass laboratory vessel manufactured from borosilicate glass 3.3, offering the chemical durability and thermal shock resistance required for demanding preparative work. The centre neck carries an NS 24/29 ground joint while the straight side neck is finished as NS 14/23, allowing simultaneous connection of condensers, addition funnels or sensors. With a nominal volume of 2 l the flask is suited to larger-scale distillation, reflux, reaction and collection procedures where multi-neck access improves process control. The spherical bottom ensures even heat distribution when used with heating mantles or baths and facilitates efficient stirring. Supplied as a single piece from manufacturer Witeg, this two-neck round-bottom flask fits standard jointed glassware systems and supports organic synthesis, analytical sample preparation and teaching laboratory applications. Its standardised joints and robust borosilicate construction provide a dependable component for reproducible laboratory assemblies.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Nominal volume: 2 l
- Number of necks: 2
- Centre neck: NS 24/29
- Side neck: NS 14/23 straight
- 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.

