Description
Round flask in DURAN® amber glass with a standing design, 50 ml capacity, and NS 29/32 ground joint is intended for small-scale laboratory work where light-sensitive media must be protected. The amber coloration reduces transmission of shorter wavelengths, supporting handling of photosensitive solutions during storage, mild heating, or connection to standard ground-joint apparatus. Supplied as a single unit and weighing 0,054 kg, the compact flask fits routine bench setups, sample preparation steps, and glassware trains built around the widely used NS 29/32 joint. Available from manufacturer Lenz, this DURAN® amber standing flask belongs to the family of round flasks and ground-joint vessels used across general labware applications. The standing format improves stability on the bench when the flask is temporarily disconnected from a clamp or support, while the conical joint ensures compatibility with stoppers, condensers, and adapters. Categories covering laboratory glass vessels and round flasks with ground joints highlight its role as a versatile small-volume container for synthesis intermediates, analytical aliquots, and protected reagents. Clear identification of the 50 ml working volume aids reproducible charging of reactions and dilutions. Together, amber DURAN® glass, standing geometry, and NS 29/32 connectivity provide a practical option for light-protected, small-scale laboratory operations.
This standing 50 ml amber flask belongs on Round-bottom flasks, in Beakers & flasks. A standing flask without the round base is on Flat-bottom flasks.
Key features
- Pack size: 1 pc(s)
- Product type: Round flask, standing
- Material: DURAN® amber glass
- Capacity: 50 ml
- Ground joint: NS 29/32
- Weight: 0,054 kg
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Questions about Round flask, DURAN®, amber glass, stand., 50 ml, NS 29/32, 1 unit(s)
What is this article?
Round flask, DURAN®, amber glass, stand., 50 ml, NS 29/32, 1 unit(s) 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.
How does ordering and shipping work?
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.

