Description
Evaporating flask 50 ml NS 19/26 flat bottom is a pear-shaped laboratory flask designed for rotary evaporation and related concentration work. Manufactured from clear borosilicate glass 3.3, it combines chemical resistance with good thermal stability for routine solvent removal under reduced pressure. The nominal volume is 50 ml (0,05 l) and the ground joint is standardised as NS 19/26, ensuring compatibility with common rotary evaporator vapour ducts and adapters. A flat bottom provides stable standing on the bench when the flask is not mounted on the evaporator. This evaporating flask from manufacturer Witeg is supplied as clear glass without coatings, making contents easy to observe during processing. Typical applications include concentration of reaction mixtures, solvent exchange and sample preparation in organic synthesis, analytical chemistry and pharmaceutical laboratories. The compact 50 ml size suits small-scale work where minimal hold-up and efficient heat transfer are required. Pack size is 10 pieces, supporting convenient stock replenishment for multi-user labs.
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: 50 ml (0,05 l)
- 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 50 ml ST 19/26 flat bottom
What is this article?
Evaporating flask 50 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.
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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.