Description
Round-bottom flask 1000 ml KS 35/20 is a single-neck laboratory flask with a spherical ground joint for secure coupling in distillation, reaction and collection setups. Manufactured from borosilicate glass 3.3, the uncoated clear-glass vessel combines chemical resistance with good thermal stability for everyday laboratory use. Nominal volume is 1 l, with an outer diameter of 126 mm and a height of 210 mm, making the flask suitable for heating, evaporation and receiving tasks. The KS 35/20 ball joint allows reliable connection to matching glassware. From manufacturer Witeg, the flask is supplied in packs of 10 pieces for preparative chemistry, solvent work and general process applications where robust round-bottom geometry is preferred. The single neck simplifies assembly of condensers, adapters or receivers, while the clear borosilicate body permits continuous visual monitoring of contents during operation in teaching and research laboratories.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 10 pieces
- Nominal volume: 1 l
- Joint size: KS 35/20
- Outer diameter: 126 mm
- Height: 210 mm
- Material: Borosilicate glass 3.3, uncoated clear glass
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Questions about Round bottom flask 1000 ml S 35/20
What is this article?
Round bottom flask 1000 ml S 35/20 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.