CAS 7440-38-2 appears in our catalog under these names: Arsenic polycrystalline lump, 2-8mm (0.08-0.3in), Puratroni , Arsenic polycrystalline lump, 2-8mm (0.08-0.3in), Puratronic, Arsenic lump, 99.999% (metals basis) , Arsenic powder, -20 mesh, 99% (metals basis) . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 1g, 10g, 25g, 100g, 1kg, 1g , 50g.