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PH Indicators
A pH indicator is a chemical compound that is added in small amounts to a solution so that the pH of a solution can be determined visually. pH indicators find many applications in biology and analytical chemistry. Typically, the indicator causes the color of the solution to change depending on the pH. These can be used in many applications with the most common being the determination of chemical reactions via titrations.
| .Indicator | pH / Color |
|---|---|
| Thymolphthalein | 9.3 / Clear |
| 10.5 / Blue | |
| Thymol Blue | 1.2 / Red |
| 2.8 / Yellow | |
| 8.0 / Yellow | |
| 9.6 / Blue | |
| Bromothymol Blue | 6.0 / Yellow |
| 7.6 / Blue | |
| Methylthymol Blue | Detection of Metal Ions in solution. |