Description
Two-neck round-bottom flask in heat-resistant borosilicate glass with centre neck NS 24/29 and angled side arm NS 19/26 offers a compact 100 ml working volume for distillation, reflux and multi-port reaction setups. Manufactured to DIN 12394 and DIN 12392, the flask features a thick wall, heavy base and reinforced rim that reduce the risk of breakage during cleaning, clamping and transport. Perfectly ground standard taper joints with smooth internal surfaces ensure a reliable, leak-tight seal when stoppers or condensers are fitted. White enamel markings remain clearly legible under laboratory conditions. The side neck is set at approximately 20° (angled/parallel configuration), giving convenient access for addition funnels, thermometers or gas inlets without crowding the centre joint. Supplied as a single piece from manufacturer ISOLAB Laborgeräte, this flask is well suited to organic synthesis, solvent recovery and teaching laboratories that require durable multi-neck glassware in a modest capacity.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Material: Borosilicate glass
- Capacity: 100 ml
- Centre neck: NS 24/29
- Side arm: NS 19/26, angled approx. 20°
- EAN: 4250362624826
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Questions about flask - round bottom - two neck - angled side arm - center neck : NS 24/29 -
What is this article?
flask - round bottom - two neck - angled side arm - center neck : NS 24/29 - is the article on this page. Luminix Health distributes ISOLAB 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.

