How is bromothymol blue made?

Answer 1

Bromothymol blue solution can be made by adding 20 milliliters of alcohol to 0.1 grams of bromothymol blue powder and 10 milliliters of 4 percent sodium hydroxide solution. Next, add one liter of of distilled water. If it looks green instead of blue, add some sodium hydroxide to it one drop at a time until it turns blue.

Answer 2

Bromothymol blue is synthesized by reacting thymol with bromine in acetic acid. The reaction results in the introduction of bromine atoms into the thymol molecule, producing bromothymol blue as the final product. The resulting compound is then purified through recrystallization to obtain a pure form of bromothymol blue.