Description
Evaporating flask 25 ml NS 19/26 flat bottom is a pear-shaped laboratory flask intended for rotary evaporation and solvent concentration. Produced from clear borosilicate glass 3.3, it combines a flat bottom with a standard ground joint NS 19/26 for dependable connection to rotary evaporators and compatible distillation apparatus. The nominal volume of 25 ml (0,025 l) is appropriate for small-scale sample handling, solvent recovery and gentle concentration of heat-sensitive solutions in analytical and synthetic laboratories. Pear geometry aids efficient film formation and heat transfer during rotation under reduced pressure, while the flat base ensures stable standing after removal from the evaporator. These evaporating flasks from manufacturer Witeg provide the chemical resistance and thermal durability associated with borosilicate glass 3.3 and are supplied in packs of 10 pieces. They suit routine use in chemistry, pharmaceutical research, natural-product isolation and quality-control settings where NS 19/26 joint compatibility and consistent glassware performance are essential.
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: 25 ml
- Joint size: NS 19/26
- Shape: Pear-shaped, flat bottom
- Material: Borosilicate glass 3.3
- Glass type: Clear glass
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Questions about Evaporating flask 25 ml ST 19/26 flat bottom
What is this article?
Evaporating flask 25 ml ST 19/26 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.
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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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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.