The indicator solution with bromocresol purple in ethanol is a useful tool for determining pH in the range of 5.2 to 6.8. In medical diagnostics and life sciences, this solution is widely used to check the acidity in liquids, including biological samples such as serum or urine.

Bromocresol purple, dissolved in ethanol, is particularly well suited for applications where the use of water-based indicators is unsuitable, such as due to the presence of hydrophobic substances or when rapid evaporation is desired.

Bromocresol purple is a pH indicator that changes color as a function of pH. In acidic environments (pH < 5.2) it takes on a yellow color, and at pH values above 6.8 it appears purple. In the range in between (pH 5.2 - 6.8), it shows a green coloration.

The way bromocresol purple works is based on its ability to absorb or release protons, depending on the surrounding acid-base conditions. This results in the visible color change that allows for quick and easy determination of pH. Overall, the bromocresol purple indicator solution is an indispensable tool in numerous scientific and diagnostic applications.