Description
Round-bottom flask of borosilicate glass 3.3 with medium neck and standard ground joint NS 29/32 is a classic laboratory vessel for distillation, reaction and collection work. This 50 ml flask has a spherical bottom that promotes uniform heating and is supplied without stopper. The medium neck carries a precision Normschliff joint that mates reliably with complementary glassware. Fabricated from borosilicate glass 3.3 by manufacturer Hecht, the flask combines chemical durability with good thermal-shock resistance, making it suitable for routine organic synthesis, solvent evaporation and as a receiving flask in distillation trains. Its single-piece construction ensures mechanical robustness under everyday laboratory handling. The ground joint geometry supports leak-free connections when used with clamps or joint clips, while the round bottom sits securely in heating mantles or oil baths. Ideal for teaching laboratories and research environments that require interchangeable standard-taper glassware in the 50 ml range.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Material: Borosilicate glass 3.3
- Capacity: 50 ml
- Neck type: Medium neck with standard ground joint
- Joint size: NS 29/32
- Stopper: Without stopper
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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 Matériel de laboratoire.
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 Matériel de laboratoire.
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.