Description
Evaporating flask, DURAN®, pear-shaped is a laboratory glass vessel designed for solvent evaporation and concentration on rotary evaporators and compatible glass setups. The 250 ml capacity is paired with a standard ground joint 29/32, allowing secure connection to common evaporator drives, condensers and jointed assemblies. Its pear-shaped body supports effective distribution of the liquid film during rotation, which is useful for controlled removal of solvents in synthesis work-up, extract concentration and preparative laboratory procedures. Made from DURAN® glass, the flask provides the chemical durability and thermal behaviour required for everyday evaporation duties with many laboratory solvents. Supplied as a single piece weighing 0,115 kg, it is practical for regular sample changes on multi-user equipment. This model from manufacturer Lenz belongs to the established family of round flasks and flasks with ground glass joints used in research and analytical labs. The NS 29/32 taper ensures broad interchangeability with standard jointed systems, while the 250 ml volume offers a convenient mid-range working size for routine concentration and solvent-exchange steps.
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
- Brand/material: DURAN®
- Shape: Pear-shaped
- Ground joint: Standard ground joint 29/32
- Capacity: 250 ml
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Questions about Evaporating flask, DURAN®, pear-shaped, with standard ground joint 29/32, 250 ml
What is this article?
Evaporating flask, DURAN®, pear-shaped, with standard ground joint 29/32, 250 ml 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.