PYREX 250mL Round Bottom Boiling Flask with Short Neck and 19-22 Joint – 4320B-250

The PYREX 250mL Short Neck Round Bottom Boiling Flask is a durable borosilicate glass flask designed for laboratory heating, boiling, distillation and chemical solution preparation. It features a 19/22 standard taper joint for connection to compatible laboratory apparatus. Its spherical body promotes uniform heat distribution, making it suitable for research, pharmaceutical, analytical and educational laboratories. Key Features - 250mL Capacity: Suitable for small-volume laboratory heating, boiling and chemical reactions. - Borosilicate Glass: Provides excellent chemical durability and thermal shock resistance. - Round Bottom Design: Promotes uniform heating during laboratory procedures. - Short Neck: Compact construction for laboratory glassware assemblies. - 19/22 Standard Taper Joint: Full-length ground-glass joint for compatible laboratory equipment. - Compact Dimensions: Approximately 83mm outside diameter and 120mm overall height. - Organic Chemistry Compatibility: Can be used as a replacement flask in compatible Corning organic chemistry kits. - Reusable Construction: Suitable for repeated laboratory applications. - Versatile Applications: Suitable for heating, boiling, distillation and chemical solution preparation. Parameter Specification Brand PYREX Manufacturer Corning Product Code 4320B-250 Product Type Laboratory Boiling Flask Nominal Capacity 250mL Material 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 83mm Overall Height Approximately 120mm Glass Colour Clear / Transparent Stopper Included No Reusability Reusable Manufacturer Quantity per Pack 1 Piece Manufacturer Quantity per Case 1 Piece Compatible Kit Series Corning 6949–6949K Organic Chemistry Kits Applications Laboratory Heating, Boiling, Distillation, Chemical Reactions and Solution Preparation