Quick Answer: Conical Glass Reaction Flask is a 100 ml narrow-mouth conical flask in borosilicate glass, with 25 ml graduations and bung size 21, used for mixing, swirling, heating and observing reactions in supervised practicals.
Last updated: October 2026
Key Features
Capacity 100 ml
Borosilicate glass, narrow-mouth conical form
Neck diameter 21.5 mm; takes bung size 21
25 ml graduations for approximate volumes
Conical body and narrow neck reduce splashing when swirling
Technical Specifications
Specification
Value
Capacity
100 ml
Material
Borosilicate glass
Flask type
Narrow mouth conical flask
Height
102 mm
Neck diameter
21.5 mm
Bung size
21
Graduations
25 ml
About This Product
The flask serves as a reaction or receiving vessel in precipitation, neutralisation, indicator and solubility demonstrations, and for preparing approximate solution volumes. Reagents are mixed by holding the neck and swirling gently with the base on or near the bench. It is filled well below the neck and never sealed during heating or gas-producing reactions. Export supply of the Conical Glass Reaction Flask can be arranged to laboratories and schools in Gabon, Papua New Guinea, Honduras, Mongolia and Côte d'Ivoire.
Frequently Asked Questions
Q1. What stopper fits this conical flask? Its 21.5 mm neck takes a size 21 bung. The flask is not stoppered during heating or reactions that produce gas.
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