Description
3-Neck flask 500 ml with centre neck NS 29/32 and two side necks NS 14,5/23 angled at 20° is a multi-neck laboratory vessel produced from borosilicate glass 3.3. The round-bottom form with three ground joints supports simultaneous connection of condensers, dropping funnels, thermometers or stirrers in synthesis, distillation and larger-scale reaction workflows. Standard NS joints ensure interchangeable, secure assembly with conventional laboratory glassware. Nominal volume is 500 ml and net weight is 0,188 kg, matching the needs of preparative chemistry and process-development laboratories. The centre neck NS 29/32 plus two side necks set at 20° give flexible multi-component access while retaining good mechanical stability on heating mantles or stands. Offered by manufacturer Rettberg, this ground-joint flask is intended for use as a reaction, distillation or receiving vessel. Borosilicate glass 3.3 supplies the chemical resistance and thermal-shock performance required for routine laboratory service. Supplied as one piece for ready integration into existing glassware trains.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Nominal volume: 500 ml
- Material: Borosilicate glass 3.3
- Centre neck: NS 29/32
- Side necks: 2 × NS 14,5/23 (angled 20°)
- Number of necks: 3
- Technical Information Sheet:
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Questions about 3-neck bottom flask, 500 ml, mn size 29/32, 2x sn size 14,5/23
What is this article?
3-neck bottom flask, 500 ml, mn size 29/32, 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.