Description
Three-necked round-bottom flask, DURAN® is a laboratory glass vessel with a nominal capacity of 5000 ml, configured with side necks of NS 29/32 and a larger centre neck of NS 45/40. The round-bottom design aids uniform heat transfer and stirring, while the three ground-glass joints permit concurrent connection of condensers, addition funnels, thermometers or gas lines in multi-port synthetic setups. Supplied as 1 pc and weighing 1,237 kg, this flask is intended for preparative chemistry, distillation and reaction work that needs both standard side ports and a wider central opening. The DURAN® glassware layout from manufacturer Lenz follows familiar European joint sizes, so NS 29/32 side necks and the NS 45/40 centre neck couple readily to matching adapters and accessories. It serves research, teaching and process laboratories that specify a 5000 ml three-neck round-bottom flask for controlled addition, reflux or inert-gas handling on a single large vessel.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Product type: Three-necked round-bottom flask
- Material: DURAN® glass
- Capacity: 5000 ml
- Side necks: NS 29/32
- Centre neck: NS 45/40
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Questions about Three-necked round-bottom flask, DURAN®, 5000 ml, side necks 29/32, centre 45/40
What is this article?
Three-necked round-bottom flask, DURAN®, 5000 ml, side necks 29/32, centre 45/40 is the article on this page. Luminix Health distributes Lenz 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?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
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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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.