CAS 122039-27-4 appears in our catalog under these names: 2,4-Diphenyl-1,3-diselenadiphosphetane 2,4-diselenide, 2,4-Diphenyl-1,3,2,4-diselenadiphosphetane 2,4-diselenide 98%, WOOLLINS' REAGENT. Offered by: Biosynth, Ambeed, Sigma-Aldrich. Available pack sizes: 5g, 1g, 250mg, 10g, 25g, 100g.