Description
Round-bottom flask 500 ml with three necks provides a clear glass reaction vessel for medium-scale laboratory work. The design incorporates a centre neck NS 29/32 and two straight side necks NS 29/32, enabling parallel connection of several ground-joint accessories. Produced from borosilicate glass 3.3, the flask offers reliable chemical durability and thermal stability for heating, stirring and distillation tasks. Nominal volume is 0,5 l with a net weight of 0,229 kg. This three-neck configuration from manufacturer Witeg is well suited to organic synthesis, reflux reactions and multi-step procedures where a condenser, addition funnel and temperature probe must operate together. The clear glass body permits continuous observation of colour changes, phase separation or boiling behaviour. Straight side necks facilitate straightforward assembly and secure clamping on standard laboratory supports. Common uses include solvent recovery, preparative distillation and controlled reactions in research, quality-control and teaching environments that require robust multi-neck glassware.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Nominal volume: 0,5 l
- Number of necks: 3
- Centre neck: NS 29/32
- Side necks: 2 × NS 29/32 straight
- Material: Borosilicate glass 3.3
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Questions about Round bottom flask 500 ml three necks CN + two SN
What is this article?
Round bottom flask 500 ml three necks CN + two SN 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.
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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.

