PYREX 5L Heavy Wall Round Bottom Boiling Flask with Short Neck and 45-50 Standard Taper Joint – 4320C-5L

The PYREX 5L Heavy Wall Round Bottom Boiling Flask is a durable laboratory glass flask designed for large-volume heating, boiling, distillation and chemical solution preparation. Manufactured from borosilicate glass, it features walls approximately 25–30% thicker than standard PYREX boiling flasks for increased mechanical strength. Its short neck and 45/50 standard taper joint allow connection to compatible laboratory glassware, making it suitable for research, pharmaceutical, industrial and educational laboratories. Key Features - 5L Capacity: Suitable for large-volume laboratory heating, boiling and chemical preparation. - Heavy Wall Construction: Glass walls 25–30% thicker than standard PYREX boiling flasks. - Borosilicate Glass: Provides excellent chemical durability and thermal resistance. - Round Bottom Design: Supports uniform heat distribution during controlled heating. - Short Neck: Compact configuration for laboratory apparatus assemblies. - 45/50 Standard Taper Joint: Full-length outer ground-glass joint for compatible laboratory equipment. - Enhanced Mechanical Strength: Heavy-duty construction improves resistance to mechanical stress. - Normal Working Temperature: 230°C under appropriate laboratory conditions. - Dimensions: Approximately 221mm outside diameter and 300mm overall height. - Reusable Construction: Designed for repeated laboratory applications. - Joint Adaptability: Compatible with appropriate joint adapters, including Corning series 8800, 8820 and 8825. Parameter Specification Brand PYREX Manufacturer Corning Product Code 4320C-5L Product Type Heavy Wall Laboratory Boiling Flask Nominal Capacity 5000mL (5 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 45/50 Joint Type Full-Length Outer Standard Taper Joint Outside Diameter Approximately 221mm Overall Height Approximately 300mm 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