Description
Round-bottom flask 50 ml NS 29/32 Economy is a clear borosilicate glass 3.3 vessel for routine distillation, reaction and receiving applications. It combines a 50 ml capacity with a standard ground joint NS 29/32, an outer diameter of 51 mm and a height of 90 mm. The spherical bottom encourages even heating and efficient agitation when used with heating mantles, oil baths or magnetic stirrers. Belonging to the Economy range from manufacturer Witeg, the flask is well suited to teaching laboratories, preparative chemistry and day-to-day synthetic work that relies on interchangeable NS 29/32 glassware. Borosilicate glass 3.3 supplies the expected resistance to thermal shock and common laboratory chemicals. Supplied in packs of 10 pieces, these flasks function as round-bottom, ground-joint, distillation or collection flasks and connect directly to condensers, adapters and other jointed components. Their straightforward design and standardised dimensions make them a practical choice for small- to medium-scale operations across chemistry and related disciplines.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 10 pc(s)
- Volume: 50 ml
- Joint size: NS 29/32
- Outer diameter: 51 mm
- Height: 90 mm
- Material: Borosilicate glass 3.3
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Questions about Round bottom flask 50 ml ST 29/32 Economy
What is this article?
Round bottom flask 50 ml ST 29/32 Economy is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Round-bottom flasks, inside Beakers & flasks, in Matériel de laboratoire.
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 Matériel de laboratoire.
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.

