Description
Pointed flask 250 ml NS 19/26 is a clear laboratory vessel intended for concentration, evaporation and residue collection where a tapered base improves drainage. Made from borosilicate glass 3.3, it combines chemical resistance with good thermal stability for everyday heating and cooling cycles. The single neck carries a standard ground joint NS 19/26, ensuring secure fitment with common stoppers, condensers and adapters. Outer diameter is 85 mm and overall height 145 mm, giving a compact footprint on the bench or in a heating mantle while the 250 ml nominal volume offers practical working capacity. The pointed geometry supports complete transfer of small sample volumes and reduces hold-up compared with round-bottom designs. Packaged as 10 pieces and supplied by manufacturer Witeg, these flasks suit organic synthesis, distillation work-ups and general analytical routines. Clear glass construction allows easy visual monitoring of contents, colour changes and boiling behaviour throughout the process.
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 19/26
- Number of necks: 1
- Material: Borosilicate glass 3.3
- Outer diameter: 85 mm
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Questions about Flask pear shaped 250 ml ST 19/26
What is this article?
Flask pear shaped 250 ml ST 19/26 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.