Round-bottom flask

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Round-bottom flasks and cork rings
Laboratory distillation set-up using a Liebig condenser, without a fractionating column. Both distilling (left) and receiving (right) flasks are round-bottom flasks.

Round-bottom flasks (round-bottomed flasks or RB flasks) are types of flasks having spherical bottoms used as laboratory glassware.

They are used mostly for chemical or biochemical work.[1] Today, they are usually made of heat-resistant borosilicate glass. There is at least one tubular section known as the neck with an opening at the tip. Two or three-necked flasks are made. Round bottom flasks come in many sizes.

References[change | change source]

  1. "OCS Lab Equipment: round Bottom Flask." Department of Chemistry. University of Nevada.