A PLUS Round Bottom Jointed Flask – 500ml, 19/26 Joint (ASTM‑Accredited Borosilicate Glass)

The A PLUS Round Bottom Jointed Flask, 500ml is a durable, cost‑effective solution for school laboratories and professional science environments. Manufactured from ASTM‑accredited 3.3 borosilicate glass, it provides excellent thermal stability and resistance to chemical corrosion, ensuring reliable performance during heating and reaction‑based experiments. Fully compatible with Quickfit‑style jointed glassware, this flask integrates seamlessly into existing laboratory setups.

Equipped with a standard 19/26 ground‑glass joint, the flask is ideal for a wide range of applications including reflux, distillation, heating, and organic synthesis. Its classic round bottom design offers even heat distribution, making it suitable for use with heating mantles, water baths, and other temperature‑controlled equipment.

Key Features

• 500ml round bottom flask with standard 19/26 joint
• Made from ASTM‑accredited 3.3 borosilicate glass
• High chemical and thermal resistance for safe heating cycles
• Fully compatible with Quickfit‑type jointed components
• Ideal for reflux, distillation, heating, and general laboratory use
• Round bottom design ensures uniform heating and efficient thermal transfer
• Durable construction suitable for school, college, and research laboratories

Ideal for School Science Lessons & Chemistry Practicals

This versatile 500ml flask is perfect for GCSE and A‑Level chemistry lessons, supporting a wide range of practical activities involving heating, mixing, and controlled reactions. Its tough borosilicate construction offers excellent resilience for repeated classroom use, making it particularly suited to busy science departments.

• Reflux experiments using condensers attached to the 19/26 joint
• Distillation setups requiring consistent heating
• Organic synthesis demonstrations involving medium‑volume reactions
• Thermal studies using heating mantles or water baths
• Teacher demonstrations on the safe use of jointed glass apparatus

Reliable, durable, and fully compatible with standard laboratory equipment, the A PLUS 500ml Round Bottom Flask helps support high‑quality, hands‑on science education.