Description
Receiving flask according to Schlenk 500 ml cylindrical NS 14/23 is a laboratory vessel designed for distillate collection in Schlenk and vacuum distillation systems. It features a round-bottom cylindrical body with a ground joint sleeve NS 14/23 and a lateral stopcock fitted with a hollow plug and glass handle. The stopcock provides a 2,5 mm bore, NS 14,5 connection and an 8 mm olive for flexible tubing. Overall dimensions are 250 × 70 mm, nominal volume is 0,5 l and net weight is 0,26 kg. Supplied by manufacturer Witeg, the flask supports controlled isolation of collected fractions under inert or reduced-pressure conditions. The side stopcock allows convenient transfer without interrupting the main distillation train. This geometry is well suited to organic synthesis, air-sensitive work and preparative distillation setups that use standard ground-joint glassware. The robust cylindrical form offers stable handling while retaining classic Schlenk receiving functionality required in research laboratories.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Nominal volume: 0,5 l
- Joint size: NS 14/23
- Stopcock bore: 2,5 mm
- Olive diameter: 8 mm
- Dimensions: 250 x 70 mm
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Questions about Collecting flask cylindrical 500 ml ST14
What is this article?
Collecting flask cylindrical 500 ml ST14 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.

