Round-Bottom Flask with Side Arm - Laboratory Glassware for Distillation & Gas Collection #3745933 (License: Personal Use)

This illustration shows a round-bottom flask equipped with a side arm (also called a Claisen adapter or distillation head), partially filled with liquid and showing rising gas bubbles-indicating active reaction or boiling. The side arm allows for vapor to exit while the main neck accommodates a condenser or thermometer, making it ideal for distillation or reflux procedures. The rounded base ensures even heating and reduces risk of breakage under vacuum or thermal stress.

Used in educational chemistry resources, lab manuals, and scientific product pages to demonstrate apparatus setup for distillation, reflux, or gas collection. Matches user intent for learning lab techniques, identifying glassware, or sourcing equipment for academic or industrial labs.