Description
Evaporating flask with PUR coating is a pear-shaped laboratory vessel manufactured from DURAN® glass, featuring a ground joint NS 29/32 and a nominal capacity of 250 ml. It is intended for rotary evaporation, solvent stripping and related concentration procedures where a larger working volume is required. The pear-shaped body aids uniform liquid-film distribution during rotation under reduced pressure, while the outer polyurethane (PUR) coating supplies an extra protective layer that can help retain glass fragments if the vessel is damaged. This single-unit flask from manufacturer Lenz weighs 0,124 kg and mates with standard laboratory evaporators accepting NS 29/32 joints. DURAN® glass delivers the thermal and chemical durability expected of laboratory borosilicate ware; the PUR coating complements that base material for applications that benefit from added mechanical protection. Suitable for chemical, pharmaceutical and life-science sample preparation, the flask forms part of the established family of jointed evaporating flasks used in distillation and concentration work. Pack size is one piece, ready for direct use in existing rotary-evaporator setups.
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 with PUR coating
- Glass: DURAN®
- Shape: Pear-shaped
- Joint size: NS 29/32
- Capacity: 250 ml
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Questions about Evaporating flask with PUR coating, DURAN®, pear-shaped, 29/32, 250ml, 1 unit(s)
What is this article?
Evaporating flask with PUR coating, DURAN®, pear-shaped, 29/32, 250ml, 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 Matériel de laboratoire.
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 Matériel de laboratoire.
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.

