Description
Two-necked flask, DURAN®, 500 ml is a jointed laboratory round flask designed for synthesis, reflux and multi-component setups that need two independent ports. The centre neck is NS 29/32 and the side neck is angled NS 14/23, so standard condensers, addition funnels or inert-gas lines can be mounted together without changing joint sizes. With a 500 ml capacity, the flask covers typical preparative batches and scale-up trials in organic and general chemistry. Produced in DURAN® glass from manufacturer Lenz, it is built for routine use in jointed glassware trains on heating mantles or oil baths. Each unit is supplied as a single piece weighing 0,200 kg and matches common European NS joint standards for the stated sizes. The angled side neck keeps auxiliary equipment offset from the main vertical axis, improving access and reducing clutter on the stand. This DURAN® two-necked flask is well suited to research, teaching and industrial laboratories that require a clear 500 ml working volume with defined centre and side joints.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Capacity: 500 ml
- Glass type: DURAN®
- Centre neck: NS 29/32
- Side neck: angled NS 14/23
- Neck configuration: two-necked
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Questions about Two-necked flask, DURAN®, 500 ml, angled side neck 14/23, centre 29/32
What is this article?
Two-necked flask, DURAN®, 500 ml, angled side neck 14/23, centre 29/32 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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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.