Boiling flask round bottom, Nairobi Industrial Area

A boiling flask (also known as a round-bottom flask) is a piece of laboratory glassware featuring a spherical bottom and a cylindrical neck. It is typically made of heat-resistant borosilicate glass, designed to evenly distribute heat during chemical reactions, distillations, or boiling processes. The round bottom allows for more uniform heating and minimizes the risk of cracking under high temperatures. This flask often fits into heating devices, like Bunsen burners or heating mantles, and is usually held in place using a clamp or stand.