CAS 2052-49-5 appears in our catalog under these names: Tetra-n-butylammonium hydroxide, 40% w/w in methanol , Tetra-n-butylammonium hydroxide, 1.0M aq. soln., HPLC grade , Tetra-n-butylammonium hydroxide, 1.0M aq. soln., ACS , Tetra-n-butylammonium hydroxide, 55% w/w aq. soln. , Tetra-n-butylammonium hydroxide, 40% w/w aq. soln. . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 2500ml, 100ml, 500ml, 25ml, 50g, 250g, 1kg , 1000g.