13676-82-9 25619-72-1 4,4'-(1-Methylethylidene)bis(2,6-di-tert-butylphenol) 4,4'-Isopropylidenebis(2,6-di-tert-butylphenol) EINECS 237-165-5 Phenol, 4,4'-(1-methylethylidene)bis(2,6-bis(1,1-dimethylethyl)-