CAS 11140-77-5 appears in our catalog under these names: Ammonium tungstate, Ammonium tungsten oxide, 99.99+% (metals basis) , AMMONIUM TUNGSTATE, 99.99% METALS BASIS. Offered by: GLPBio, Thermo Scientific (Alfa Aesar), Sigma-Aldrich. Available pack sizes: 100g, 500g, 10g, 50g, 250g.