CAS 55277-90-2 appears in our catalog under these names: S,S-Di(pyridin-2-yl) carbonodithioate 95%, S,S-Di(pyridin-2-yl) carbonodithioate, 95%, DIPYRIDYL DITHIOCARBONATE, S,S-Di(pyridin-2-yl) carbonodithioate, 95%, 95%. Offered by: Ambeed, Fluorochem, Sigma-Aldrich, Chemat. Available pack sizes: 100mg, 250mg, 1g, 5g, 25g, 10g.