Description
Round-bottom flask, 4000 ml, socket NS 45/40 is a single-neck laboratory flask designed for distillation, reaction and collection applications at larger scale. Made from borosilicate glass 3.3, the vessel offers strong chemical durability and reliable thermal performance under laboratory heating conditions. A medium neck with ground joint NS 45/40 provides a standardised, leak-resistant interface for condensers, still heads and other jointed glassware. Nominal volume is 4 l and net weight is 0,997 kg, balancing substantial working capacity with practical handling on heating mantles or baths. Available as a single piece from manufacturer Rettberg, this round-bottom flask supports organic synthesis, solvent recovery, concentration and general chemical processing workflows. The spherical shape encourages uniform heating and effective mixing. It is commonly employed as a distillation flask, receiving flask or multi-purpose reaction vessel in research, production support and quality-control laboratories that use interchangeable ground-joint apparatus.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Nominal volume: 4 l
- Joint size: NS 45/40
- Material: Borosilicate glass 3.3
- Neck type: Medium neck
- Number of necks: 1
- Technical Information Sheet:
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Questions about Round bottom flask, 4000 ml, socket size 45/40
What is this article?
Round bottom flask, 4000 ml, socket size 45/40 is the article on this page. Luminix Health distributes Rettberg 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.
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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.