Description
DURAN® evaporator flask with NS, pear-shaped is a 250 ml laboratory flask made from borosilicate glass 3.3 for solvent evaporation and concentration work. As a pear-shaped variant of the round-bottom flask, it presents a large, uniform liquid surface that favours efficient evaporation of solvents under reduced pressure or heating. The standard ground joint NS 29/32 delivers a tight, precise connection to rotary evaporators and other ground-joint glassware. Permanently fired white printing remains legible throughout repeated laboratory use. Suitable applications include evaporating liquids, heating in baths or heating mantles, mixing several components and concentrating solutions on rotary evaporators. This single-piece flask from manufacturer Duran/DWK Life Sciences has a nominal volume of 0,25 l and a net weight of 0,15 kg. Compatible with all standard rotary evaporators, the pear-shaped DURAN® evaporator flask supports distillation, concentration and preparative workflows in chemistry, pharmaceutical and research laboratories that require reliable borosilicate glass apparatus. Its geometry promotes consistent solvent removal during continuous rotation.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Storage temperature: Standard
- Nominal volume: 0,25 l
- Joint size: NS 29/32
- Material: Borosilicate glass 3.3
- EAN: 4032051025981
Recently viewed
You may also like
Browse related categories
Category
Sub-category
Catalogue
Brand
Questions about DURAN® Evaporating Flask, with standard ground joint, pear shape
What is this article?
DURAN® Evaporating Flask, with standard ground joint, pear shape is the article on this page. Luminix Health distributes DWK Life Sciences 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?
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.