Description
The 3-neck flask, 25 ml, with centre neck NS 14,5/23 and two side necks NS 14,5/23 angled at 20° is a precision laboratory vessel made of borosilicate glass 3.3. This multi-neck flask provides three ground-joint connections of size NS 14,5/23, enabling simultaneous attachment of several apparatus components in a compact footprint. The nominal volume is 25 ml (0,025 l) and the net weight is 0,040 kg. Borosilicate glass 3.3 offers the chemical durability and thermal properties expected of high-quality laboratory glassware. The centre neck is oriented vertically while the two side necks are inclined at 20°, giving convenient access angles for condensers, dropping funnels, thermometers or other fittings. The product type is laboratory vessels; the registered trademark Rettberg ® identifies the manufacturer Rettberg. Originating from Germany, the flask is suitable for use as a round-bottom, ground-joint, distillation or receiving flask in synthetic, analytical and preparative work. Supplied as a single piece, it integrates readily into standard NS 14,5/23 glassware assemblies and supports flexible multi-port reaction or distillation setups where space and joint compatibility are important.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Nominal volume: 25 ml
- Material: Borosilicate glass 3.3
- Number of necks: 3
- Joint size: NS 14,5/23
- Side necks: 2× NS 14,5/23 (angled 20°)
- Technical Information Sheet:
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Questions about 3-neck bottom flask, 25 ml, mn size 14,5/23, 2x sn size 14,5/23
What is this article?
3-neck bottom flask, 25 ml, mn size 14,5/23, 2x 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?
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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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.