PYREX 50mL Round Bottom Boiling Flask with Short Neck and 19-22 Joint – 4320B-50

The PYREX 50mL Short Neck Round Bottom Boiling Flask is a durable laboratory glass flask designed for small-volume heating, boiling, distillation and chemical solution preparation. Manufactured from No. 7740 borosilicate glass, it features a short neck with a full-length 19/22 standard taper joint for connection to compatible laboratory glassware. Its round-bottom design promotes uniform heat distribution, making it suitable for research, pharmaceutical, analytical and educational laboratories. Key Features - 50mL Capacity: Suitable for small-volume laboratory heating, boiling and chemical reactions. - Borosilicate Glass: Manufactured from PYREX No. 7740 glass for chemical durability and thermal resistance. - Round Bottom Design: Promotes uniform heat distribution during controlled heating. - Short Neck: Compact configuration for laboratory glassware assemblies. - 19/22 Standard Taper Joint: Full-length ground-glass joint for connection to compatible equipment. - Compact Dimensions: Approximately 49mm outside diameter and 81mm overall height. - Heat Resistance: Normal working temperature of 230°C. - Thermal Shock Resistance: Controlled glass wall thickness helps resist temperature changes. - Chemical Durability: Resistant to many commonly used laboratory chemicals. - Reusable Construction: Suitable for repeated laboratory applications. Parameter Specification Brand PYREX Manufacturer Corning Product Code 4320B-50 Product Type Laboratory Boiling Flask Nominal Capacity 50mL Material No. 7740 Borosilicate Glass Flask Shape Spherical Bottom Type Round Bottom Neck Style Short Neck Top Style Standard Taper Joint Joint Size 19/22 Joint Type Full-Length Standard Taper Joint Outside Diameter Approximately 49mm Overall Height Approximately 81mm 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