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.
Products
NS 29/32
Catalog No Capacity (mL) Diameter d (mm) Height h (mm) Remarks Quantity
NS 45/40
Catalog No Capacity (mL) Diameter d (mm) Height h (mm) Remarks Quantity
NS 24/29
Catalog No Capacity (mL) Diameter d (mm) Height h (mm) Remarks Quantity
NS 14/23
Catalog No Capacity (mL) Diameter d (mm) Height h (mm) Remarks Quantity
NS 19/26
Catalog No Capacity (mL) Diameter d (mm) Height h (mm) Remarks Quantity
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.
Products
NS 29/32
Catalog No Capacity (mL) Diameter d (mm) Height h (mm) Remarks Quantity
NS 45/40
Catalog No Capacity (mL) Diameter d (mm) Height h (mm) Remarks Quantity
NS 24/29
Catalog No Capacity (mL) Diameter d (mm) Height h (mm) Remarks Quantity
NS 14/23
Catalog No Capacity (mL) Diameter d (mm) Height h (mm) Remarks Quantity
NS 19/26
Catalog No Capacity (mL) Diameter d (mm) Height h (mm) Remarks Quantity