Product Description

Bromothymol Blue Indicator is supplied by Micromaster. It is available in the form of a dark ink blue coloured solution which is clear without any particles. At pH 6.0, the indicator turns yellow and at pH 7.6, the indicator is blue. This product should be stored between 10-30°C in a tightly closed container.

• Quantity provided: 100 ml/bottle

Bromothymol blue (also known as bromothymol sulfone phthalein, and BTB) is a pH indicator for reactions between strong acids and bases. It is mostly used in applications that require measuring substances that would have a relatively neutral pH (near 7), such as managing the pH of pools and fish tanks. A common use is for measuring the presence of carbonic acid in a liquid. Bromothymol blue acts as a weak acid in solution. It can thus be in protonated or deprotonated form, appearing yellow or blue, respectively. It is bluish green in neutral solution. The deprotonation of the neutral form results in a highly conjugated structure, accounting for the difference in color. An intermediate of the deprotonation mechanism is responsible for the greenish color in neutral solution.