Description
Schlenk flask 50 ml with socket NS 14,5/23 and lateral high-vacuum PTFE valve (fine thread) is a specialised laboratory vessel for air- and moisture-sensitive work under inert atmosphere or vacuum. Made from borosilicate glass 3.3, the flask offers the chemical resistance and mechanical stability expected of professional Schlenk apparatus. The side-mounted high-vacuum PTFE valve is equipped with a fine thread for controlled operation and provides a passage of 0–8 mm; the olive of Ø 9 mm enables secure connection to vacuum or inert-gas tubing. With a nominal volume of 50 ml it is suited to small-scale reactions, solvent transfers and sample handling on the Schlenk line. The standard NS 14,5/23 ground-joint socket ensures compatibility with common laboratory stoppers and glassware. This single-piece unit from manufacturer Rettberg has a net weight of 0,073 kg and belongs to the established range of Schlenk flasks designed for organometallic chemistry, catalysis and other procedures that require rigorous exclusion of air and moisture.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
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Questions about Nitrogen flask, 50 ml, socket size 14,5/23, PTFE high vacuum-valve
What is this article?
Nitrogen flask, 50 ml, socket size 14,5/23, PTFE high vacuum-valve is the article on this page. Luminix Health distributes Rettberg 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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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.

