bromthymolblått

Bromthymolblått is a pH indicator that changes color depending on the acidity or alkalinity of a solution. It is typically used in laboratory settings to determine the approximate pH of a substance. In acidic solutions, with a pH below 6.0, bromthymolblått appears yellow. As the pH increases and becomes neutral, around pH 7.0, the indicator turns green. In alkaline or basic solutions, with a pH above 7.6, bromthymolblått exhibits a blue color.

The chemical compound itself is a salt of bromothymol blue, which is a sulfonphthalein dye. Its color transitions are due to the ionization of the molecule, which is affected by the concentration of hydrogen ions in the solution. Bromthymolblått is often used in biological experiments, such as in aquariums to monitor water quality or in classroom demonstrations of acid-base titrations. Due to its clear and distinct color changes within a useful pH range, it is a popular choice for educational purposes. The sensitivity of the indicator makes it suitable for detecting slight variations in pH.