Bromtymolblått

Bromthymolblått is a chemical compound used as a pH indicator. It is a weak acid that dissociates in water, and its color changes depending on the acidity or alkalinity of the solution. In acidic conditions, it appears yellow. In neutral solutions, it is green. In alkaline conditions, it turns blue. This color change occurs within a pH range of approximately 6.0 to 7.6, making it particularly useful for distinguishing between slightly acidic, neutral, and slightly alkaline environments.

The chemical formula for bromthymolblått is C17H18Br2O5S. It is typically supplied as a powder or in solution. Its primary application is in laboratories and educational settings to visually demonstrate pH changes. For example, it is often added to solutions during titrations or used to test the pH of water samples. It is also commonly found in respiratory monitors, where it changes color in response to the carbon dioxide exhaled by a patient, indicating whether the patient is breathing adequately. Bromthymolblått is generally considered safe to handle with standard laboratory precautions, though skin and eye contact should be avoided.