Description
Two-necked flask, DURAN®, 250 ml is a round laboratory flask fitted with two ground-glass necks for multi-port reaction and distillation work. The centre neck is NS 19/26 and the angled side neck is NS 29/32, giving a versatile joint combination for connecting condensers, dropping funnels, gas lines or other standard apparatus at the same time. Nominal volume is 250 ml, suitable for medium-scale organic procedures, solvent handling and routine laboratory operations. Supplied as one piece, the flask weighs 0,110 kg. It is manufactured from DURAN® glass by Lenz and belongs to the range of round flasks and flasks with ground glass joints commonly used in laboratory glassware systems. The angled side arm with the larger NS 29/32 joint improves spatial arrangement of attached components and reduces crowding around the centre neck. This two-neck design integrates into existing NS joint assemblies for general chemistry, research and teaching laboratories that need dependable multi-neck round flasks with mixed joint sizes.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Product type: Two-necked flask
- Capacity: 250 ml
- Centre neck: NS 19/26
- Side neck: angled NS 29/32
- Material: DURAN®
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Questions about Two-necked flask, DURAN®, 250 ml, angled side neck 29/32, centre 19/26
What is this article?
Two-necked flask, DURAN®, 250 ml, angled side neck 29/32, centre 19/26 is the article on this page. Luminix Health distributes Lenz 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?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
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.