Description
Round-bottom flask with standard ground joint, LBG 3.3, NS 19/26, 50 ml is laboratory glassware for distillation, reflux, reaction and collection applications, supplied here as a convenient multipack of 12 pieces. Each flask is produced from borosilicate glass 3.3, combining thermal shock resistance with broad chemical durability for routine organic and analytical work. Nominal volume is 50 ml (0,05 l) per flask, with a standard ground joint NS 19/26 for secure coupling to condensers, adapters and complementary jointed components. Pack net weight is 0,384 kg. These round-bottom flasks from manufacturer Labbox form part of the LBG range and are well suited to heating under reflux, solvent recovery and sample collection. They are commonly used as round-bottom, ground-joint, distillation and receiving flasks. The spherical body promotes uniform heating and effective mixing with a heating mantle or oil bath, while the standardised joint ensures straightforward integration into existing glassware trains for synthesis, purification and teaching laboratory workflows that require multiple identical vessels.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
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Questions about Boiling flask round bottom, LBG 3.3, mouth 19/26, 50 ml, 12 pcs
What is this article?
Boiling flask round bottom, LBG 3.3, mouth 19/26, 50 ml, 12 pcs is the article on this page. Luminix Health distributes Labbox 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.

