Description
Evaporating flask 100 ml NS 14/23 flat bottom is a pear-shaped laboratory flask designed for rotary evaporation and concentration of solvents. Fabricated from clear borosilicate glass 3.3, it features a flat bottom and a standard ground joint NS 14/23 for secure coupling to rotary evaporators and distillation set-ups. With a nominal volume of 100 ml (0,1 l), the flask is well suited to medium-scale sample preparation, solvent recovery and controlled concentration of heat-sensitive media in analytical and preparative laboratories. The pear shape promotes uniform film formation and efficient heat transfer during rotation under vacuum, while the flat base provides stable standing when the vessel is detached from the evaporator. These evaporating flasks from manufacturer Witeg deliver the chemical resistance and thermal stability characteristic of borosilicate glass 3.3 and come in packs of 10 pieces. They integrate readily into glassware systems that use NS 14/23 joints and support everyday applications in chemistry, pharmaceutical development, natural-product work and quality-control environments.
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: 100 ml
- Joint size: NS 14/23
- Shape: Pear-shaped, flat bottom
- Material: Borosilicate glass 3.3
- Glass type: Clear glass
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Questions about Evaporating flask 100 ml ST 14/23 flat bottom
What is this article?
Evaporating flask 100 ml ST 14/23 flat bottom 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.

