100mL Single Neck Round Bottom Flask with 24/40 Standard Ground Joint, 3.3 Borosilicate Glass Lab Boiling Flask for Distillation, Reflux & Organic Synthesis Experiments

Lab Boiling Flasks 100mL Single Neck Round Bottom Boiling Flasks Borosilicate Glass with 24/40 Standard Taper Outer Joint

• Heavy-Duty 3.3 Borosilicate Glass Material：Constructed from premium GG3.3 high borosilicate glass with thickened walls, this lab flask features excellent thermal shock resistance and strong corrosion resistance against most acids, alkalis and organic solvents. It can withstand rapid temperature fluctuations without cracking for long-term repeated lab operations.
• Industry Standard 24/40 Ground Glass Joint: Precision machined 24/40 male ground joint ensures tight, leak-free connection with matching lab glass parts including condensers, separatory funnels, stoppers and adapters. Perfectly compatible with all standard chemistry lab distillation and reflux assemblies.
• 100mL Calibrated Round Bottom Design: Clear permanent 100mL volume marking provides a quick visual reference for reagent preparation. Spherical round bottom distributes heat evenly on heating mantles, oil baths or sand baths, avoiding local overheating and stabilizing reaction conditions. Fully transparent body lets you track liquid color changes, precipitation and boiling status at all times.
• Versatile Laboratory Application: An indispensable piece of glassware for university chemistry labs, high school teaching labs, pharmaceutical R&D, cosmetic formulation, essential oil extraction, solvent reflux, sample distillation and amateur scientific research projects. Suitable for all kinds of organic and inorganic heating reactions.
• Reinforced Safe Craftsmanship: Seamless hand-blown integrated molding eliminates hidden dead angles for thorough reagent mixing. Thick reinforced top lip resists chipping during daily handling and assembly. Smooth ground joint surface prevents abrasion during repeated disassembly and connection.