CAS 15492-51-0 appears in our catalog under these names: Tris(2,2,6,6-tetramethyl-3,5-heptanedionato)terbium(iii), 95%, Tris(2,2,6,6-tetramethyl-3,5-heptanedionato)terbium(III), 98%, Tris(2,2,6,6-tetramethyl-3,5-heptanedionato)terbium(III), 99. Offered by: Combi-blocks, Chemat Brand, Thermo Scientific (Alfa Aesar). Available pack sizes: 1g, 5g, on request.