Description
Round-bottom flask with standard ground joint NS 19/26 is a laboratory flask made from borosilicate glass 3.3, supplied without stopper and marked with a white inscription. The nominal volume is 50 ml and the socket joint is NS 19/26, conforming to DIN EN ISO 4797 for interchangeability with matching ground-joint components. The spherical base supports uniform heating and efficient mixing in synthesis, distillation and general reaction work. Borosilicate glass 3.3 provides the thermal shock resistance and chemical durability required in routine analytical and preparative laboratories. White inscription improves visibility of identification marks during handling and setup. Offered in a pack of 10 pieces from manufacturer Hecht, these flasks integrate into standard ground-joint assemblies with condensers, adapters and multi-neck configurations. Without a stopper, users retain full freedom to select closures or leave the neck open according to the protocol. Suitable for heating mantles, oil baths and wet-chemistry workflows, the design combines reliable joint geometry with practical laboratory durability for everyday glassware use.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 10 pc(s)
- Volume: 50 ml
- Joint size: NS 19/26
- Material: Borosilicate glass 3.3
- Inscription: White
- Standard: DIN EN ISO 4797
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Questions about Flasks, boiling, round bottom with socket, Boro 3.3, DIN EN ISO 4797, printing
What is this article?
Flasks, boiling, round bottom with socket, Boro 3.3, DIN EN ISO 4797, printing is the article on this page. Luminix Health distributes Hecht 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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.