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DURAN® Round Bottom Flask with Standard Ground Joint

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DURAN® Round Bottom Flask

with standard ground joint
  • Complies with DIN ISO 4797
  • Manufactured from 3.3 expansion borosilicate glass
  • Tight closure due to standard interchangeable ground neck joint
  • The geometry permits very uniform heating
  • Closable with glass and plastic stopper
  • Fired-on, highly durable white print

 

Product Overview

Due to their versatile application possibilities, round bottom flasks are widely used in the laboratory environment. Round flasks and the media they contain can be heated e.g. by heating mantles or liquid baths or cooled by a cold bath. However, selective warming or cooling must be avoided. Due to their shape, round bottom flasks are also suitable for vacuum applications. However, care must be taken to ensure that the glass surface is free of defects (no cracks, deep scratches, etc.). The standard ground joint allows a precise connection to other ground joint components such as columns, condensers, adapters, funnels, etc.

NS 14/23

Catalog No Main Article Description Capacity (mL) Diameter d (mm) Height h (mm)
241701307 NS 14/23 25 41 85
241702003 NS 14/23 50 51 90
241702509 NS 14/23 100 64 105

NS 19/26

Catalog No Main Article Description Capacity (mL) Diameter d (mm) Height h (mm) Remarks
241701401 NS 19/26 25 41 85 Non-DIN/ISO size.
241701701 NS 19/26 50 51 90 –
241702406 NS 19/26 100 64 105 –

NS 24/29

Catalog No Main Article Description Capacity (mL) Diameter d (mm) Height h (mm) Remarks
241701804 NS 24/29 50 51 105 Non-DIN/ISO size.
241702603 NS 24/29 100 64 105 –
241703608 NS 24/29 250 85 140 –
241704407 NS 24/29 500 105 163 –
241705403 NS 24/29 1000 131 200 –

NS 29/32

Catalog No Main Article Description Capacity (mL) Diameter d (mm) Height h (mm) Remarks
241701907 NS 29/32 50 51 105 Non-DIN/ISO size.
241702706 NS 29/32 100 64 105 –
241703702 NS 29/32 250 85 140 –
241704604 NS 29/32 500 105 163 –
241705609 NS 29/32 1000 131 200 –
241706305 NS 29/32 2000 166 240 –

NS4 45/40

Catalog No Main Article Description Capacity (mL) Diameter d (mm) Height h (mm) Remarks
241704707 NS 45/40 500 105 163 Non-DIN/ISO size.
241705703 NS 45/40 1000 131 200 Non-DIN/ISO size.
241706408 NS 45/40 2000 166 240 Non-DIN/ISO size.
241707207 NS 45/40 4000 207 290 –

Specification

Diameter d (mm) : 66
Diameter (mm) : 66
Thread : GL 45
Color : blue-yellow
Colour : blue-yellow
Material : PP, PTFE, Silicone
Height (mm) : 38
Autoclavable : Yes