Quick Answer:The Distillation Flask is a borosilicate glass flask with a side arm, used in chemical laboratories to separate liquid mixtures by distillation, and made in 100 ml, 125 ml, 250 ml and 500 ml sizes.
Last updated: 18 October 2026
Key Features
Borosilicate glass, heat and chemical resistant.
Side arm of 7 mm or 9 mm diameter, depending on size.
Four capacities: 100, 125, 250 and 500 ml.
Separates liquid mixtures by distillation.
Technical Specifications
Specification
Value
Material
Borosilicate glass
100 ml
Dia. 65 mm, height 215 mm, side arm dia. 7 mm, arm length 100
125 ml
Dia. 68 mm, height 215 mm, side arm dia. 7 mm, arm length 100
250 ml
Dia. 85 mm, height 226 mm, side arm dia. 9 mm, arm length 130
500 ml
Dia. 105 mm, height 240 mm, side arm dia. 9 mm, arm length 130
How It Is Used
The liquid mixture is heated in the flask; vapour of the more volatile part rises and leaves through the side arm into a condenser, where it condenses and is collected separately. The part that is left behind stays in the flask.
Frequently Asked Questions
What sizes is the Distillation Flask made in?
Four: 100 ml (65 mm dia., 215 mm high), 125 ml (68 mm, 215 mm), 250 ml (85 mm, 226 mm) and 500 ml (105 mm, 240 mm).
