CAS 1309-48-4 appears in our catalog under these names: Magnesium oxide, 98%, Magnesium Oxide, 4N, Magnesium oxide, 99.995 %, Magnesium Oxide (Technical Grade), Magnesium oxide/ 98+%. Offered by: Combi-blocks, Chemat Brand, TRC, Chemat, GLPBio. Available pack sizes: 500g, 25g, 1kg, 100g, 5g, on request, 10g, 50g.