A chemical indicator used in laboratories that changes color based on whether a solution is acidic or basic.
From 'brom' (bromine) + 'cresol' (a type of phenolic compound). Developed in early 20th-century chemistry labs as scientists created synthetic pH indicators.
Bromcresol blue is one of the most iconic lab indicators—it turns bright blue in basic solutions and yellow in acidic ones, making it a visual map of chemical acidity that students have been using for over a century.
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