Three-Neck Round Bottom Flasks

United Scientific Three-Neck Round Bottom Flasks are built for demanding laboratory setups that require multiple access points for reagents, condensers, thermometers, addition funnels, or adapters. The angular three-neck design gives chemists flexible connection options for synthesis, reflux, distillation, boiling, and controlled reaction workflows.

Made from heavy-duty ASTM E-438 Type 1 borosilicate 3.3 glass, these flasks feature low-expansion glass construction and uniform wall thickness for superior mechanical strength and thermal shock resistance. Each flask includes 24/40 ground glass joints on the center and side necks for compatibility with standard laboratory glassware systems.

• Angular three-neck round bottom design supports versatile reaction setups
• Made from heavy-duty ASTM E-438 Type 1 borosilicate 3.3 glass
• Low-expansion glass construction helps improve thermal shock resistance
• Uniform wall thickness provides superior mechanical strength
• 24/40 ground glass joints on center and side necks support standard glassware connections
• Available capacities include 100 mL, 250 mL, 500 mL, and 1000 mL
• Ideal for synthesis, reflux, distillation, boiling, and controlled reaction workflows
• Strain point of 515°C, annealing point of 565°C, and softening point of 820°C