CAS 1317-37-9 appears in our catalog under these names: Iron(II) sulfide, tech. , Iron(II) sulfide, 99.9% (metals basis) , Iron(II) sulfide, 99% (metals basis) , Iron(II) sulfide, 99.98% (metals basis) . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 1000g, 5000g, 250g, 1g, 10g, 50g, 5g, 25g.