Bromothymol Blue(CAS: 76-59-5)

Bromothymol Blue is a pH indicator commonly used to determine acidity or alkalinity in solutions. Its chemical formula is C21H24Br2O5S, and it exhibits a color change from yellow in acidic conditions (pH < 6.0) to blue in basic environments (pH > 7.6). It is a weak acid, water-soluble, and has a molecular weight of 544.3 g/mol. This compound is widely recognized for its role in titration and biological applications due to its sensitivity to pH variations.

Bromothymol Blue is primarily used in pharmaceuticals for pH testing of solutions, in the food industry to assess the pH of products like beverages, and in research for monitoring environmental and biological pH changes. It is also employed in industrial settings to check wastewater pH and in aquariums to test water quality. Its applications are broad, leveraging its ability to change color within a specific pH range (6.0-7.6) for accurate analysis.

Bromothymol Blue is generally considered safe when used in recommended concentrations, but it requires proper handling to avoid irritation. Direct contact with eyes or skin may cause mild discomfort, so protective gloves and goggles are advised. While it is not classified as highly toxic, safety data sheets (SDS) recommend following standard laboratory protocols. Always adhere to OSHA and EPA guidelines for safe use and disposal.

Bromothymol Blue should be stored in a cool, dry place away from direct light to maintain stability. It is best kept in airtight, dark-colored containers to prevent degradation. Storage conditions should ensure humidity levels are low, as moisture can affect its performance. Properly sealed containers help preserve its potency and color accuracy for extended periods.