A chemical indicator dye similar to bromothymol that changes color based on pH and is often used in laboratory testing.
From 'bromo-' (containing bromine) + 'phenol' (an organic compound derived from benzene). Developed in the late 1800s as part of the phenolphthalein family of indicators.
Bromphenol blue is used in protein analysis because it binds to proteins and creates a vivid color change—scientists use this trick to measure protein concentration without any special equipment!
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