Description
Round-bottom flask with standard ground joint, LBG 3.3, NS 19/26, 100 ml is a laboratory vessel made from borosilicate glass 3.3 for distillation, reaction and collection work. It combines a spherical body with a nominal volume of 0,1 l and a standard ground joint NS 19/26, enabling secure, interchangeable connections in multi-piece glass apparatus. The round shape supports even heat distribution and efficient mixing under reflux, heating or vacuum conditions typical of organic synthesis and preparative chemistry. Produced in the LBG borosilicate glassware line from manufacturer Labbox, the flask offers the thermal shock resistance and chemical durability associated with borosilicate glass 3.3 in routine laboratory use. Supplied as a single piece with a net weight of 0,052 kg, it is well suited to bench-scale preparations where a compact 100 ml capacity is required. Typical applications include round-bottom flasks, ground-joint flasks, distillation flasks and receiving flasks in academic, industrial and quality-control laboratories that rely on standardised NS joint geometry for modular setups.
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, 100 ml
What is this article?
Boiling flask round bottom, LBG 3.3, mouth 19/26, 100 ml 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.
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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.

