Description
Flat-bottom flask 250 ml with NS 29/32 ground joint, manufactured from clear borosilicate glass 3.3 for general laboratory use. The vessel features a medium neck and a stable flat base suited to heating, mixing and storage of liquids on the bench or under mild thermal load. External diameter is 85 mm and overall height is 135 mm, giving a compact footprint while retaining the full 250 ml nominal volume. Borosilicate glass 3.3 provides the chemical resistance and thermal durability expected in routine synthesis, sample preparation and distillation setups. The standardised NS 29/32 joint ensures compatibility with common condensers, adapters and stoppers. Supplied in packs of 10 pieces from manufacturer Witeg, these clear-glass flat-bottom flasks support everyday laboratory workflows where reliable joint geometry, good visibility of contents and robust glassware are required for teaching, research and quality-control applications.
This article is part of Flat-bottom flasks, in Beakers & flasks.
Key features
- Pack size: 10 pc(s)
- Nominal volume: 250 ml
- Joint size: NS 29/32
- Outer diameter: 85 mm
- Height: 135 mm
- Material: Borosilicate glass 3.3
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Questions about Flat bottom flask 250 ml ST 29/32
What is this article?
Flat bottom flask 250 ml ST 29/32 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Flat-bottom flasks, inside Beakers & flasks, in Labware.
A flat-bottom flask stands on the bench without a cork ring, which a round-bottom flask will not do. It is for heating on a plate and for simple setups. It is a poorer shape than a round bottom for even boiling under vacuum.
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 Flat-bottom flasks. The catalogue is Labware.
Shelves beside this one are Round-bottom flasks, Beakers, Erlenmeyer flasks, Reaction vessels & jacketed vessels, 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. Delivery across Europe, two to five days when in stock. 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.