Florence flask

This article is about a long neck round body laboratory flask. For the oil-water separator, see Florentine flask.

A Florence flask/boiling flask is a type of flask used as an item of laboratory glassware and is named after the city Florence.^[1] It is used as a container to hold liquids. A Florence flask has a round body, a long neck, and often a flat bottom. It is designed for uniform heating, boiling, distillation and ease of swirling; it is produced in a number of different glass thicknesses to stand different types of use. They are often made of borosilicate glass for heat and chemical resistance. Traditional Florence flasks typically do not have a ground glass joint on their rather longer necks, but typically have a slight lip or flange around the tip of the neck. The common volume for a Florence flask is 1 litre.^[2]

Florence flask

Photograph of a 1 liter Florence flask suspended by its neck with a three-finger clamp
Uses	Boiling Distillation
Related items	Round-bottom flask

See also

• Erlenmeyer flask
• Round-bottom flask