Beschrijving
Round-bottom flask of borosilicate glass 3.3 with medium neck and standard ground joint NS 29/32, without stopper, is a laboratory glassware item with 250 ml capacity. This flask presents a classic round-bottom form combined with a medium neck carrying a Normschliff joint of size 29/32 and is delivered without any stopper. Constructed entirely from borosilicate glass 3.3, it is listed among round-bottom flasks, ground-joint flasks, distillation flasks and receiving flasks. The single-piece unit supports connection to matching ground-joint apparatus commonly used in distillation or collection setups. In the middle of laboratory workflows the flask from manufacturer Hecht integrates readily into existing glass assemblies thanks to the standardised NS 29/32 joint on its medium neck. Absence of a stopper leaves the neck free for user-selected closures, adapters or condensers. The 250 ml volume suits typical bench-scale operations that require a stable round-bottom vessel for heating, mixing or condensate collection. Material designation borosilicate glass 3.3 together with the defined joint size and neck style fully characterises the item for catalogue and procurement purposes.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Product type: Round-bottom flask
- Material: Borosilicate glass 3.3
- Neck: Medium neck with standard ground joint
- Joint size: NS 29/32
- Capacity: 250 ml
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Questions about Round bottom flasks, borosilicate glass 3.3, with standard ground joint, without
What is this article?
Round bottom flasks, borosilicate glass 3.3, with standard ground joint, without is the article on this page. Luminix Health distributes Hecht for laboratory use. It sits in Round-bottom flasks, inside Beakers & flasks, in Labmateriaal.
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 Labmateriaal.
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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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.