Bromothymol blue CAS 76-59-5

Bromothymol blue, with the CAS number 76-59-5, is a pH indicator commonly used in various chemical and biological applications. It is a sulfonphthalein dye that changes color depending on the pH of the solution it is in.
Properties and Uses
Color Change: Bromothymol blue exhibits a color change from yellow at a pH of 6.0 to blue at a pH of 7.6. This makes it particularly useful for indicating neutral to slightly alkaline conditions.
Applications: It is widely used in laboratories for titrations, as a pH indicator in aquariums, and in various educational settings to demonstrate acid-base reactions.
Chemical Structure: The compound is a derivative of phenol and is often used in its sodium salt form for better solubility in water.
Safety and Handling
While bromothymol blue is generally considered safe for use in laboratory settings, it is advisable to handle it with care, using appropriate personal protective equipment (PPE) such as gloves and goggles to avoid any potential irritation.
In summary, bromothymol blue is a versatile pH indicator with a clear color transition that makes it valuable in both educational and practical applications in chemistry.