CAS 90-66-4 appears in our catalog under these names: 6,6'-Thiobis(2-(tert-butyl)-4-methylphenol), 6,6'-Thiobis(2-(tert-butyl)-4-methylphenol) 97%, 2,2'-Thiobis(6-tert-butyl-p-cresol), 95%, 2,2'-Thiobis(6-tert-butyl-p-cresol), 97%, 97%. Offered by: Fluorochem, Ambeed, Combi-blocks, Chemat. Available pack sizes: 1g, 250mg, 5g, 25g, 100g.