Two-Neck Borosilicate Glass Distillation Flask with Threaded Joints

Thermal Properties

• Strain Point: 515°C
• Annealing Point: 565°C
• Softening Point: 820°C
• Coefficient of Linear Expansion: 32.5 x 10^-7 / °C
• Specific Heat: 0.2
• Thermal Conductivity (Cal/cm³°C/Sec): 0.0027

Chemical Durability - Contact

• Water distilled at 100°C: 6 hours - 10 mg/m² lost
• Water vapour steam at 121°C: 1 hour - 75 mg/m² lost
• Acid HCl: 6 hours - 100 mg/m² lost
• 80% H₂SO₄ at 130°C: 12 hours - 140 mg/m² lost
• Alkali -1N solution of Na₂CO₃ boiling: 6 hours - 4000 mg/m² lost

Chemical Durability - Isotonic Infusion Fluids

• NaCl (0.85%) at 121°C: 2.5 hours - 70 mg/m² lost
• Glucose (5%) at 121°C: 2.5 hours - 50 mg/m² lost

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