Description
Round-bottom flask, white graduated, 250 ml with NS 19/26 ground joint is a durable laboratory vessel made from heat-resistant borosilicate glass conforming to DIN EN ISO 4797. Designed as a standing or round-bottom flask with standard ground joint, it features a thick wall, heavy base and reinforced rim that help reduce breakage risk during cleaning and transport. Perfectly ground NS necks with a smooth interior provide a reliable, leak-tight seal for distillation, collection and general reaction work. Volume graduations and inscriptions are printed in durable white enamel for clear readability under laboratory lighting. Supplied without stopper, this 250 ml flask from manufacturer ISOLAB Laborgeräte suits routine organic synthesis, solvent recovery and sample handling where a stable, heat-resistant round-bottom geometry is required. The combination of robust construction and precise NS 19/26 joint makes it a practical choice for everyday glassware setups in research and quality-control laboratories.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Capacity: 250 ml
- Ground joint: NS 19/26
- Material: Borosilicate glass
- Graduation: White enamel
- EAN: 4250362624611
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Questions about flask - round bottom - glass - clear - NS neck - 250 ml - NS19/26
What is this article?
flask - round bottom - glass - clear - NS neck - 250 ml - NS19/26 is the article on this page. Luminix Health distributes ISOLAB 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.