004-Phenol-Red-pH-Indicator-Solution-500mL
Phenol red is typically used as a pH indicator when mixed into an aqueous solutions. Its color will exhibit a gradual transition from yellow to red, as it moves through the pH range of 6.8 to 8.2. Above pH 8.2, it will turn a bright pink.
It is also used as a pH indicator for home swimming pool test kits.
