Description
Round-bottom flask 250 ml NS 29/32 is a clear laboratory flask manufactured from borosilicate glass 3.3 for distillation, collection and general heating applications. It features a single medium neck with standard ground joint NS 29/32, an outer diameter of 85 mm and a height of 140 mm, giving a compact geometry suited to common laboratory setups. The nominal volume of 0,25 l supports typical reaction and recovery volumes while the round-bottom shape promotes even heat distribution. Supplied in packs of 10 pieces from manufacturer Witeg, each flask has a net weight of 0,108 kg. Borosilicate glass 3.3 offers the chemical resistance and thermal stability expected in routine organic synthesis, solvent recovery and sample preparation. The NS 29/32 joint ensures compatibility with standard condensers, adapters and other ground-joint glassware, making this flask a practical choice for teaching laboratories, research benches and process development work where reliable, clear glassware is required.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 10 pc(s)
- Nominal volume: 250 ml
- Joint size: NS 29/32
- Material: Borosilicate glass 3.3
- Outer diameter: 85 mm
- Height: 140 mm
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Questions about Round bottom flask 250 ml ST 29/32
What is this article?
Round bottom flask 250 ml ST 29/32 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.