Description
Round flasks in DURAN® transparent glass with a 500 ml capacity and NS 29/32 ground joint are laboratory round-bottom vessels for distillation, Soxhlet work and sample preparation. The transparent DURAN® glass body allows continuous visual monitoring of contents during heating, reflux, concentration or extraction steps. A standardised NS 29/32 joint ensures straightforward connection to condensers, adapters and other matching ground-joint components commonly used in environmental analysis and routine laboratory assemblies. Each flask is supplied as 1 pc and has a weight of 0,200 kg, making it practical for medium-scale distillation and sampling workflows. These round flasks from manufacturer Lenz fit established glassware trains for distillation and Soxhlet appliances as well as broader sampling and sample-preparation tasks. The 500 ml working volume supports typical laboratory batch sizes without unnecessary bulk, while the round form promotes even heat distribution when used with appropriate heating equipment. Suitable for research, teaching and routine analytical laboratories that require reliable DURAN® round flasks with NS 29/32 connectivity for distillation and related preparative operations.
This article is part of Round-bottom flasks, in Beakers & flasks.
Key features
- Pack size: 1 pc
- Product type: Round flask
- Material: DURAN® transparent glass
- Capacity: 500 ml
- Ground joint: NS 29/32
- Weight: 0,200 kg
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Questions about Round flasks,DURAN®, transparent glass, 500 ml, NS 29/32, 1 pc
What is this article?
Round flasks,DURAN®, transparent glass, 500 ml, NS 29/32, 1 pc 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.

