CAS 261-31-4 appears in our catalog under these names: 9H-Thioxanthene, Thioxanthene, 98%, 9H-Thioxanthene, ≥98%, ≥98%, 9H-Thioxanthene, 98%(GC-MS),RG. Offered by: Mikromol, Thermo Scientific (Acros), Chemat, Fluorochem. Available pack sizes: 25mg, 100mg, 1g, 5g, 50mg.