PYREX 5L Heavy Wall Round Bottom Boiling Flask with Short Neck – 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 high-quality 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 enable connections 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 versions for increased mechanical strength. - Borosilicate Glass: Offers excellent chemical durability and thermal resistance. - Round Bottom Design: Promotes uniform heat distribution during controlled heating. - Short Neck: Compact design 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 provides additional durability for laboratory operations. - Heat Resistance: Normal working temperature of 230°C. - Chemical Durability: Resistant to many commonly used laboratory chemicals. - Reusable Construction: Designed for repeated laboratory applications. 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 Wall Thickness Approximately 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 Resistant to thermal shock under appropriate laboratory conditions Chemical Resistance Excellent Chemical Durability 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