PYREX 250mL Pear-Shaped Boiling Flask with 24-40 Standard Taper Joint – 4318-250

The PYREX 250mL Pear-Shaped Boiling Flask is a durable laboratory glass flask designed for heating, boiling, distillation and chemical solution preparation. Manufactured from high-quality No. 7740 borosilicate glass, it features a short neck with a 24/40 outer standard taper joint for secure connection to compatible laboratory apparatus. Its pear-shaped design and excellent thermal shock resistance make it suitable for research, pharmaceutical, analytical and educational laboratories. Key Features - 250mL Capacity: Suitable for small-volume heating, distillation and chemical preparations. - Borosilicate Glass: Manufactured from PYREX No. 7740 glass for chemical durability and thermal resistance. - Pear-Shaped Design: Suitable for controlled laboratory heating and distillation. - 24/40 Standard Taper Joint: Full-length outer ground-glass joint for compatible laboratory assemblies. - Short Neck: Compact construction for laboratory distillation setups. - Heat Resistance: Manufacturer-stated normal working temperature of 230°C. - Thermal Shock Resistance: Controlled wall thickness helps resist thermal stress. - Chemical Durability: Resistant to many commonly used laboratory chemicals. - Dimensions: Approximately 83mm outside diameter and 152mm overall height. - Reusable Construction: Designed for repeated laboratory applications. Parameter Specification Brand PYREX Manufacturer Corning Product Code 4318-250 Product Type Laboratory Boiling Flask Nominal Capacity 250mL Material No. 7740 Borosilicate Glass Flask Shape Pear-Shaped Bottom Design Rounded Neck Style Short Neck Top Style Standard Taper Joint Joint Size 24/40 Joint Type Full-Length Outer Standard Taper Joint Outside Diameter Approximately 83mm Overall Height Approximately 152mm 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 Sample Preparation