3,3-Dibromothymolsulfonephthalein; Bromthymol Blue; BTB; alpha,alpha-bis(5-bromo-4-hydroxy-6-methyl-m-cumenyl)toluene-2,alpha-sultone; dibromothymolsulphonephthalein; 3,3-Dibromophenolsulfonephthalein; 4,4'-(1,1-dioxido-3H-2,1-benzoxathiole-3,3-diyl)bis[2-bromo-3-methyl-6-(propan-2-yl)phenol]; 2-bromo-4-[3-(3-bromo-4-hydroxy-2-isopropyl-5-methyl-phenyl)-1,1-dioxo-benzo[c]oxathiol-3-yl]-3-isopropyl-6-methyl-phenol