CAS 16940-81-1 appears in our catalog under these names: Hexafluorophosphoric acid, ca 60% w/w aq. soln. , Hexafluorophosphoric acid, 60 wt.% solution in water, HEXAFLUOROPHOSPHORIC ACID SOLUTION, APP&, Hexafluorophosphoric acid, 60% in water. Offered by: Thermo Scientific (Alfa Aesar), Thermo Scientific (Acros), Sigma-Aldrich, Fluorochem. Available pack sizes: 25ml, 100ml, 500ml, 25g, 500g, 100g.