Description
Evaporating flask 250 ml NS 29/32 is a pear-shaped laboratory flask for rotary evaporation and related concentration procedures. Produced from borosilicate glass 3.3, this clear, uncoated vessel delivers the chemical resistance and thermal performance expected in standard laboratory use. A ground joint NS 29/32 provides a secure interface with rotary evaporators and compatible glassware. Outer diameter is 81 mm and height is 140 mm, giving a pear profile sized for efficient solvent removal at the 250 ml scale while remaining practical to handle. The nominal volume of 0,25 l supports medium-scale sample preparation in organic synthesis, analytical chemistry and pharmaceutical research. Offered in packs of 10 pieces from manufacturer Witeg, the flasks match existing laboratory setups that rely on the NS 29/32 joint standard. Uncoated clear glass construction allows continuous visual control of the contents throughout the evaporation cycle. The design is appropriate for general laboratory workflows that require reliable borosilicate evaporating flasks for routine concentration and solvent recovery.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 10 pc(s)
- Nominal volume: 0,25 l
- Joint size: NS 29/32
- Material: Borosilicate glass 3.3
- Outer diameter: 81 mm
- Height: 140 mm
Recently viewed
You may also like
Browse related categories
Category
Sub-category
Catalogue
Brand
Questions about Evaporating flask 250 ml ST 29/32
What is this article?
Evaporating flask 250 ml ST 29/32 is the article on this page. Luminix Health distributes Witeg 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.