Description
Two-neck round-bottom flask 100 ml GL 25/12 is a dual-neck laboratory vessel intended for distillation, reaction and multi-port experimental setups. The flask provides a nominal volume of 0,1 l (100 ml) and is equipped with two necks: a centre neck with GL 25/12 thread and an angled side neck with GL 18/10 thread. This configuration allows simultaneous connection of condensers, addition funnels, sensors or other screw-thread accessories while maintaining a compact working volume. Net weight is 0,07 kg, making the flask suitable for routine bench-scale work. Manufactured by Witeg, the two-neck round-bottom flask supports flexible assembly of glassware trains in research, process development and teaching laboratories. Supplied as a single piece, it belongs to the categories of round-bottom, jointed and distillation flasks commonly used for synthesis, reflux and collection tasks. The centre-neck plus angled side-neck geometry facilitates efficient reagent addition and vapour management. Originating from Germany (Baden-Württemberg), the flask integrates into standard laboratory systems requiring GL-threaded multi-neck vessels of 100 ml capacity for reliable everyday chemical operations.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Product type: Two-neck round-bottom flask
- Nominal volume: 0,1 l (100 ml)
- Number of necks: 2
- Centre neck: GL 25/12
- Side neck: angled GL 18/10
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Questions about Flask, 100 ml, center neck GL 25/12, si
What is this article?
Flask, 100 ml, center neck GL 25/12, si 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.
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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.

