CAS 7757-79-1 appears in our catalog under these names: Potassium nitrate, Puratronic«, 99.995% (metals basis) , Potassium nitrate, 99.994% (metals basis) , Potassium nitrate, 99% , Potassium nitrate, ACS, 99.0% min . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 5g, 50g, 250g, 25g, 100g, 10000g, 2500g, 500g.