CAS 7783-85-9 appears in our catalog under these names: Ammonium iron(II) sulfate hexahydrate, 99% , Ammonium iron(II) sulfate hydrate, Puratronic½, 99.999% (me , Ammonium iron(II) sulfate hexahydrate, ACS, 98.5-101.5% . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 500g, 1g, 5g, 25g, 2kg.