A blue dye derived from litmus that contains an azo group (N=N); used as a pH indicator and in some laboratory and industrial applications.
From 'azo-' (nitrogen-nitrogen bond) + 'litmus' (from Dutch 'lakmoets,' a dye from lichen). Created by chemically modifying natural litmus dye with azo groups.
Azolitmin is what happens when chemists decide to give an old indicator dye a molecular makeover—by adding azo bonds, they changed how it behaves and opened new uses in testing.
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