Description
Flat-bottom flask with standard ground joint NS 14/23 is a 25 ml laboratory vessel supplied as a practical multipack of 12 pieces, each made from borosilicate glass 3.3 (LBG 3.3). The nominal volume of 0,025 l per flask supports small-scale synthesis, sample handling, heating, and routine wet-chemistry tasks that benefit from a stable flat base. The NS 14/23 ground joint ensures compatibility with standard condensers, adapters, and stoppers for distillation, reflux, or extraction assemblies. Borosilicate glass 3.3 provides the thermal and chemical durability expected for everyday laboratory glassware. This 12-piece pack from manufacturer Labbox is convenient for teaching laboratories, shared research benches, and stock replenishment where several identical 25 ml flat-bottom flasks are needed. Each flask stands securely on hot plates or stirrers when used with suitable support. Consistent joint size and LBG 3.3 material designation simplify matching to existing ground-joint systems and glassware inventories across the laboratory.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
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Questions about Boiling flask, flat bottom, LBG 3.3, mouth 14/23, 25 ml, 12 pcs
What is this article?
Boiling flask, flat bottom, LBG 3.3, mouth 14/23, 25 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.
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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.

