Specification Product Name BROMOPHENOL RED Synonyms 5’,5”-Dibromophenol sulfonphtalein CAS NO. 2800-80-8 Molecular Formula C19H12Br2O5S Formula Weight 512.190 Appearance Red-brown to brown powder Structure     Tests    Limits Transition Range - pH 5.2 – pH 6.8 Greenish Yellow – Purple Solubility 0.1% (20% EtOH) Clear golden yellow Solution Absorptivity 1%, 1cm (pH 4.7) at λmax.439.0 nm (pH 6.3) at λmax.579.0 nm - (340-370) - (585-720) 4. Loss on Drying at 1100C (1hr) - <5%         REVISED: 1-1-2012