Description
Round-bottom flask 500 ml NS 29/32 Economy is a clear laboratory vessel with a nominal volume of 500 ml and a standard ground joint NS 29/32. Manufactured from borosilicate glass 3.3, it offers the thermal shock resistance and chemical durability required for routine distillation, reflux and collection work. The flask has an outer diameter of 105 mm and an overall height of 170 mm, providing a stable profile for use on heating mantles or oil baths. Clear glass construction permits continuous visual monitoring of contents and reaction progress. This Economy series item from manufacturer Witeg is supplied in packs of 10 pieces and is intended for everyday organic synthesis, solvent recovery and general heating applications. The single-neck design with precise joint geometry ensures reliable sealing with matching stoppers, adapters and condensers. Suitable for chemical, pharmaceutical and teaching laboratories that require durable round-bottom flasks with standardised NS joints.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 10 pc(s)
- Volume: 500 ml
- Joint size: NS 29/32
- Outer diameter: 105 mm
- Height: 170 mm
- Material: Borosilicate glass 3.3
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Questions about Round bottom flask 500 ml ST 29/32 Economy
What is this article?
Round bottom flask 500 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 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.

