PYREX 5L Round Bottom Boiling Flask with Long Neck and Tooled Mouth – 4280-5L

The PYREX 5L Round Bottom Boiling Flask is a high-quality laboratory glass flask designed for large-volume heating, boiling, mixing and chemical solution preparation. Manufactured from durable No. 7740 borosilicate glass, it features a long neck with a tooled mouth for secure rubber stopper fitting. Its spherical bottom promotes uniform heat distribution, while its excellent chemical durability and thermal shock resistance make it suitable for research, pharmaceutical, industrial and educational laboratories. Key Features - 5L Capacity: Suitable for large-volume laboratory heating, boiling and chemical preparation. - Borosilicate Glass: Manufactured from PYREX No. 7740 glass for excellent chemical and thermal resistance. - Round Bottom Design: Promotes uniform heat distribution during controlled heating. - Long Neck: Suitable for integration into laboratory apparatus assemblies. - Tooled Mouth: Designed for consistent rubber stopper fitting. - Stopper Compatibility: Accepts a No. 11 rubber stopper. - Heat Resistance: Normal working temperature of 230°C. - Thermal Shock Resistance: Controlled glass wall thickness improves resistance to thermal stress. - Chemical Durability: Resistant to many commonly used laboratory chemicals. - Reusable Construction: Designed for repeated laboratory operations. Parameter Specification Brand PYREX Manufacturer Corning Product Code 4280-5L Product Type Laboratory Boiling Flask Nominal Capacity 5000mL (5 Litres) Material No. 7740 Borosilicate Glass Flask Shape Spherical Bottom Type Round Bottom Neck Style Long Neck Top Style Tooled Mouth Rubber Stopper Size No. 11 Stopper Included No Outside Diameter Approximately 221mm Overall Height Approximately 380mm Normal Working Temperature 230°C Thermal Resistance Thermal Shock Resistant Chemical Resistance Excellent Chemical Durability Glass Colour Clear / Transparent Reusability Reusable Manufacturer Quantity per Pack 1 Piece Manufacturer Quantity per Case 6 Pieces Applications Laboratory Heating, Boiling, Mixing and Chemical Solution Preparation