Description
Two-necked flask, DURAN®, 4000 ml is a large-capacity multi-neck laboratory vessel with ground glass joints for preparative synthesis, concentration and distillation work. Centre neck and angled side neck are both 29/32, enabling simultaneous connection of condensers, addition funnels, stirrers or inert-gas lines on a single flask. Delivered as one piece and weighing 0,943 kg, this DURAN® flask from manufacturer Lenz is intended for processes that need a 4000 ml working volume without moving to bulk reactors. Matched joint sizes streamline adapter selection and support secure assembly on laboratory stands and heating mantles. The angled side neck improves accessibility when multiple fittings are in use and helps keep clamps and tubing away from the heat source. Clear DURAN® glass permits visual control of boiling, colour changes and phase separation during extended runs. Typical applications include organic preparation, solvent recovery and controlled-atmosphere reactions in research, pilot and quality-control laboratories that require larger batch sizes.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Product type: Two-necked flask
- Glass type: DURAN®
- Capacity: 4000 ml
- Centre neck: 29/32
- Side neck: angled 29/32
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Questions about Two-necked flask, DURAN®, 4000 ml, angled side neck 29/32, centre 29/32
What is this article?
Two-necked flask, DURAN®, 4000 ml, angled side neck 29/32, 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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Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
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.