Beschrijving
4-Neck flask 250 ml with centre neck NS 29/32 and angled side necks NS 19/26 is a multi-neck round-bottom vessel designed for laboratory synthesis, distillation and reaction work under controlled conditions. Manufactured to DIN 12394, this borosilicate glass flask provides four ground-joint openings that allow simultaneous connection of condensers, dropping funnels, thermometers or gas inlets while maintaining a sealed system. The nominal volume of 0,25 l suits medium-scale preparations, and the angled side necks improve accessibility and reduce interference between attached apparatus. Supplied as a single piece with a net weight of 0,155 kg, the flask originates from manufacturer Witeg and is intended for use in organic chemistry, preparative work and teaching laboratories. Its four-neck configuration supports complex reaction setups requiring multiple reagent additions, reflux or inert-gas blanketing. The standardised NS joints ensure compatibility with common laboratory glassware, enabling reliable assembly of distillation trains, receivers or multi-component reaction systems without custom adapters.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Product type: 4-neck round-bottom flask
- Nominal volume: 0,25 l
- Centre neck (MH): NS 29/32
- Side necks (SH): NS 19/26, angled
- Standard: DIN 12394
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Questions about Flasks, 4 necks, necks angled, 250 ml,
What is this article?
Flasks, 4 necks, necks angled, 250 ml, is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Rondbodemkolven, inside Bekerglazen & kolven, in Labmateriaal.
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.
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The category is Bekerglazen & kolven. The sub-category is Rondbodemkolven. The catalogue is Labmateriaal.
Shelves beside this one are Bekerglazen, Erlenmeyerkolven, Reactievaten & mantelvaten, Kolven met vlakke bodem, Kolven (overig) and Bekerglas- & kolfaccessoires.
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