CAS 6156-78-1 appears in our catalog under these names: Manganese(II) acetate tetrahydrate, Puratronic|r, 99.999% (m, Manganese(II) acetate tetrahydrate, Mn 22% (typical) . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 5g, 25g, 100g, 500g, 2kg.