PYREX 1L Heavy Wall Round Bottom Boiling Flask with Short Neck and 24-40 Joint – 4320C-1L

The PYREX 1L Heavy Wall Round Bottom Boiling Flask is a durable laboratory glass flask designed for 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 24/40 standard taper joint allow secure connection to compatible laboratory glassware, making it suitable for research, pharmaceutical, analytical and industrial laboratories. Key Features - 1L Capacity: Suitable for medium-volume laboratory heating, boiling and chemical reactions. - Heavy Wall Construction: Glass walls 25–30% thicker than standard PYREX boiling flasks for enhanced mechanical strength. - Borosilicate Glass: Provides excellent chemical durability and thermal resistance. - Round Bottom Design: Promotes uniform heat distribution during controlled heating. - Short Neck: Compact design 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. - Thermal Shock Resistance: Durable construction suitable for controlled laboratory heating. - Dimensions: Approximately 127mm outside diameter and 189mm overall height. - Reusable Construction: Suitable for repeated laboratory applications. Parameter Specification Brand PYREX Manufacturer Corning Product Code 4320C-1L Product Type Heavy Wall Laboratory Boiling Flask Nominal Capacity 1000mL (1 Litre) Material Borosilicate Glass Flask Shape Spherical Bottom Type Round Bottom Neck Style Short Neck Wall Construction Heavy Wall 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 127mm Overall Height Approximately 189mm Normal Working Temperature 230°C Thermal Resistance Resistant to thermal shock under suitable 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