Description
Receiving flask according to Schlenk 500 ml cylindrical NS 29/32 is a laboratory glass vessel engineered for distillate collection in Schlenk and vacuum distillation setups. Its cylindrical form with round bottom incorporates a ground joint sleeve NS 29/32 that mates directly with standard apparatus. The lateral stopcock features a hollow plug, glass handle and 2,5 mm bore for precise flow control, complemented by a side arm with NS 14,5 joint and 8 mm olive for flexible tubing connection. Dimensions measure 250 × 70 mm. Delivered as one piece with a net weight of 0,32 kg, the flask provides ample capacity for preparative work while remaining compatible with common ground-joint systems. Produced by manufacturer Witeg, this receiving flask is well suited to organic synthesis, solvent recovery and the handling of air- or moisture-sensitive compounds. The configuration allows secure integration into distillation trains and inert-atmosphere manifolds used throughout research and analytical laboratories, ensuring reliable containment and transfer of collected fractions.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Nominal volume: 500 ml
- Joint size: NS 29/32
- Body shape: Cylindrical, round bottom
- Side stopcock: Hollow plug, glass handle, bore 2,5 mm
- Side connection: NS 14,5 with olive 8 mm
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Questions about Collecting flask cylindrical 500 ml ST29
What is this article?
Collecting flask cylindrical 500 ml ST29 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.
How does ordering and shipping work?
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.

