Round bottom flask 25 ml two necks CN + SN

Round-bottom flask 25 ml two necks MH + SH NS 14/23 angled is a laboratory flask featuring two necks: a centre neck with NS 14/23 ground joint and a side neck angled at 20° also finished with NS 14/23. Produced as clear glass from borosilicate glass 3.3, it offers a nominal volume of 25 ml for small-scale work. This flask from manufacturer Witeg belongs to the categories of round-bottom flasks, ground-joint flasks, distillation flasks and receiving flasks, making it suitable for multi-port assemblies in chemical laboratories. The centre neck provides the primary access while the angled side neck supports simultaneous connection of condensers, dropping funnels or sensors without crowding the setup. Supplied as a single piece with a net weight of 0,032 kg, the compact form fits standard heating mantles and clamps. Clear glass construction permits continuous visual monitoring of contents during reactions, distillations or collections. The NS 14/23 joints ensure interchangeability with common laboratory glassware components. With its two-neck configuration and 25 ml capacity the flask is practical for organic synthesis, solvent handling and sample preparation workflows that require controlled addition or vapour management in research and routine analytical environments.

This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.

Key features

• Pack size: 1 pc
• Nominal volume: 25 ml
• Number of necks: 2
• Centre neck: NS 14/23
• Side neck: 20° angled NS 14/23
• Material: Borosilicate glass 3.3