Description
2-Neck flask 50 ml with centre neck socket NS 14,5/23 and side neck socket NS 14,5/23 angled at 20° is a precision laboratory vessel fabricated from borosilicate glass 3.3. This dual-neck design supports simultaneous attachment of condensers, dropping funnels, thermometers or other ground-joint apparatus while maintaining a closed system. The flask serves effectively as a round-bottom flask, ground-joint flask, distillation flask or receiving flask in organic synthesis, fractional distillation and general preparative work. Borosilicate glass 3.3 provides the chemical resistance and thermal durability required for repeated heating and cooling cycles under laboratory conditions. The 20° angled side neck improves accessibility and reduces spatial interference in multi-component assemblies. With a net weight of 0,042 kg the vessel remains lightweight yet stable during routine handling and clamping. Manufactured by Rettberg, the flask carries the registered trademark Rettberg ® and is supplied as a single piece ready for immediate integration into existing glassware sets. Its standardised NS 14,5/23 joints ensure compatibility with common laboratory connectors and adapters used throughout research and analytical environments.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Nominal volume: 50 ml
- Material: Borosilicate glass 3.3
- Number of necks: 2
- Centre neck: NS 14,5/23
- Side neck: NS 14,5/23 (angled 20°)
- Technical Information Sheet:
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Questions about 2-neck round bottom flask, 50 ml, mn size 14,5/23, sn size 14,5/23
What is this article?
2-neck round bottom flask, 50 ml, mn size 14,5/23, sn size 14,5/23 is the article on this page. Luminix Health distributes Rettberg 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?
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.