PYREX 12L Heavy Wall Round Bottom Boiling Flask with Short Neck and 55-50 Standard Taper Joint – 4320C-12L

The PYREX 12L Heavy Wall Round Bottom Boiling Flask is a large-capacity laboratory glass flask designed for heating, boiling, distillation and chemical solution preparation. Manufactured from durable borosilicate glass, it features walls 25–30% thicker than standard PYREX boiling flasks for enhanced mechanical strength. Its short neck and 55/50 standard taper joint allow connection to compatible laboratory apparatus, making it suitable for research, pharmaceutical, industrial and chemical laboratories. Key Features - 12L Capacity: Suitable for large-volume laboratory heating, boiling and chemical preparation. - Heavy Wall Construction: Glass walls approximately 25–30% thicker than standard PYREX boiling flasks. - Borosilicate Glass: Offers excellent chemical durability and thermal resistance. - Round Bottom Design: Promotes uniform heat distribution during controlled heating. - Short Neck: Compact neck construction for laboratory apparatus assemblies. - 55/50 Standard Taper Joint: Full-length outer ground-glass joint for compatible laboratory equipment. - Enhanced Mechanical Strength: Heavy-duty construction for demanding laboratory applications. - Heat Resistance: Manufacturer-stated normal working temperature of 230°C. - Large Dimensions: Approximately 295mm outside diameter and 385mm overall height. - Reusable Construction: Designed for repeated laboratory operations. Parameter Specification Brand PYREX Manufacturer Corning Product Code 4320C-12L Product Type Heavy Wall Laboratory Boiling Flask Nominal Capacity 12,000mL (12 Litres) 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 55/50 Joint Type Full-Length Outer Standard Taper Joint Outside Diameter Approximately 295mm Overall Height Approximately 385mm Normal Working Temperature 230°C Thermal Resistance Resistant to thermal shock under appropriate 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