CAS 3811-73-2 appears in our catalog under these names: 2-Mercaptopyridine N-oxide sodium salt, anhydrous, 98% , 2-Mercaptopyridine N-oxide sodium salt, 40% aq. soln. . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 1g, 5g, 25g, 2500ml, 100ml, 500ml.