Description
Erlenmeyer flask 250 ml Boro 3.3 is a wide-neck laboratory flask with standard ground joint NS 45/40, intended for mixing, heating and temporary holding of solutions in chemical, biotechnological and teaching laboratories. Fabricated from borosilicate glass 3.3, the vessel withstands typical thermal cycling and exposure to common laboratory reagents while retaining optical clarity for process observation. Nominal volume is 0,25 l and height is 135 mm, balancing usable capacity with a stable bench footprint. The wide neck simplifies addition of powders and liquids, improves access for cleaning brushes and supports effective manual or magnetic stirring. The NS 45/40 joint enables reliable coupling to matching stoppers, drying tubes and other ground-joint components for open or closed configurations. Available in packs of 10 pc(s) from manufacturer Hirschmann, these flasks fit standard glassware inventories used for media prep, sample dilution and intermediate reaction steps. The classic conical profile aids mixing efficiency and reduces splash during agitation. Choose this model when a 250 ml wide-neck Erlenmeyer with NS 45/40 joint in borosilicate glass 3.3 is required.
This article is part of Erlenmeyer flasks, in Beakers & flasks.
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Questions about ERLENMEYER FLASK 250 ML, WIDE NECK WITH NS 45/40
What is this article?
ERLENMEYER FLASK 250 ML, WIDE NECK WITH NS 45/40 is the article on this page. Luminix Health distributes Hirschmann for laboratory use. It sits in Erlenmeyer flasks, inside Beakers & flasks, in Labware.
An Erlenmeyer, or conical, flask has a flat base and a narrowing wall so a liquid can be swirled. It is the ordinary culture and titration flask. A baffled wall is a different article, used when the swirl must turn the liquid over.
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 Erlenmeyer flasks. The catalogue is Labware.
Shelves beside this one are Round-bottom flasks, Beakers, 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.

