Chemical formula C19H10Br4O5S molecular weight 670.02 CAS registration number 115-39-9 EINECS registration number 204-086-2 dangerous goods transport number UN 2265 3/PG 3 bromophenol blue, molecular formula: C19H10Br4O5S, light yellow to brown-yellow powder; Soluble in sodium hydroxide solution, soluble in methanol, ethanol and benzene, slightly soluble in water (about 0.4g/100ml), with the maximum absorption wavelength of 422nm. A pH indicator, ranging from yellow to blue in pH 3.0 to 4.6. Commonly used as an electrophoretic indicator dye, the electrophoretic migration rate in the gel is in the region of small nucleic acid or protein.

Prepare bromophenol blue indicator solution. Use: color range: ph 2.8-4.6 (yellow-blue), acid base indicator; Indicator for non-aqueous titration, protein electrophoresis staining; Virus assay, etc.