Description
Evaporating flask, DURAN®, pear-shaped is a 25 ml laboratory flask fitted with a standard ground joint 14/23 for evaporative and concentration applications. The pear-shaped body supports efficient collection of concentrate at the base and is widely used in rotary evaporation, gentle solvent removal and small preparative workflows. Constructed from DURAN® glass, it delivers the transparency and joint compatibility expected in professional laboratory glassware for synthesis, work-up and teaching environments. The NS 14/23 ground joint mates with matching evaporators, adapters and distillation components, simplifying assembly of modular glass trains. Each flask is supplied as one piece with a weight of 0,048 kg, convenient for single-station use or inventory of interchangeable vessels. This evaporating flask from manufacturer Lenz sits within the category of round flasks and flasks with ground glass joints employed across distillation and extraction work. The 25 ml capacity offers a practical intermediate volume between micro flasks and larger evaporating bulbs while preserving the pear geometry that aids recovery of small residues. It is intended for laboratories standardised on DURAN® ground-joint systems that require consistent joint size and reliable glass quality for everyday evaporative operations.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Product type: Evaporating flask
- Shape: Pear-shaped
- Material: DURAN® glass
- Ground joint: Standard ground joint 14/23
- Capacity: 25 ml
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Questions about Evaporating flask, DURAN®, pear-shaped, with standard ground joint 14/23, 25ml
What is this article?
Evaporating flask, DURAN®, pear-shaped, with standard ground joint 14/23, 25ml 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.