PYREX 50mL Heavy Wall Round Bottom Boiling Flask with Short Neck – 4320C-50

The PYREX 50mL Heavy Wall Round Bottom Boiling Flask is a durable laboratory flask designed for small-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 24/40 standard taper joint provide compatibility with laboratory glassware assemblies, making it suitable for research, pharmaceutical, analytical and educational laboratories. Key Features - 50mL Capacity: Ideal for small-volume laboratory heating, boiling and chemical reactions. - Heavy Wall Construction: Glass walls 25–30% thicker than standard versions for increased mechanical strength. - Borosilicate Glass: Provides excellent chemical durability and thermal resistance. - Round Bottom Design: Promotes uniform heat distribution during controlled laboratory heating. - Short Neck: Compact construction for laboratory apparatus assemblies. - 24/40 Standard Taper Joint: Full-length outer ground-glass joint for connection to compatible laboratory equipment. - Enhanced Durability: Heavy-duty design provides increased resistance to mechanical stress. - Heat Resistance: Normal working temperature of 230°C. - Compact Dimensions: Approximately 49mm outside diameter and 61mm overall height. - Reusable Construction: Suitable for repeated laboratory operations. Parameter Specification Brand PYREX Manufacturer Corning Product Code 4320C-50 Product Type Heavy Wall Laboratory Boiling Flask Nominal Capacity 50mL 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 24/40 Joint Type Full-Length Outer Standard Taper Joint Outside Diameter Approximately 49mm Overall Height Approximately 61mm Normal Working Temperature 230°C Thermal Resistance Thermal Shock Resistant 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