PYREX 3L Heavy Wall Round Bottom Boiling Flask with Short Neck and 24-40 Joint – 4320C-3L

The PYREX 3L Heavy Wall Round Bottom Boiling Flask is a durable borosilicate glass flask designed for laboratory heating, boiling, distillation and chemical solution preparation. Featuring walls 25–30% thicker than standard PYREX boiling flasks, it provides increased mechanical strength. Its short neck and 24/40 standard taper joint allow connection to compatible laboratory glassware, making it suitable for research, pharmaceutical, industrial and educational laboratories. Key Features - 3L Capacity: Suitable for large-volume laboratory heating, boiling and chemical preparation. - Heavy Wall Construction: Walls 25–30% thicker than standard versions for increased mechanical strength. - Borosilicate Glass: Provides chemical durability and thermal shock resistance. - Round Bottom Design: Promotes uniform heating during controlled laboratory operations. - Short Neck: Compact construction suitable for laboratory apparatus assemblies. - 24/40 Standard Taper Joint: Full-length outer ground-glass joint for compatible laboratory equipment. - Heat Resistance: Manufacturer-stated normal working temperature of 230°C. - Dimensions: Approximately 189mm outside diameter and 255mm overall height. - Joint Adaptability: Compatible with appropriate Corning joint adapters, including series 8800, 8820 and 8825. - Reusable Construction: Designed for repeated laboratory use. Parameter Specification Brand PYREX Manufacturer Corning Product Code 4320C-3L Product Type Heavy Wall Laboratory Boiling Flask Nominal Capacity 3000mL (3 Litres) Material Borosilicate Glass Flask Shape Spherical Bottom Type Round Bottom Neck Style Short Neck Wall Construction Heavy Wall Relative Wall Thickness 25–30% thicker than standard version Top Style Standard Taper Joint Joint Size 24/40 Joint Type Full-Length Outer Standard Taper Joint Outside Diameter Approximately 189mm Overall Height Approximately 255mm Normal Working Temperature 230°C Thermal Resistance Thermal Shock Resistant Chemical Resistance Resistant to many common laboratory chemicals Glass Colour Clear / Transparent Stopper Included No Reusability Reusable Manufacturer Quantity per Pack 1 Piece Manufacturer Quantity per Case 1 Piece Applications Laboratory Heating, Boiling, Distillation, Chemical Reactions and Solution Preparation