CAS 25638-17-9 appears in our catalog under these names: Sodium Butylnaphthalenesulfonate, Sodium 4-butylnaphthalene-1-sulfonate AR,≥60%, Butylnaphthalenesulfonic acid sodium salt, Sodium butylnaphthalenesulfonate (ca. 40% in water). Offered by: GLPBio, Ambeed, Chemat, Fluorochem. Available pack sizes: 100g, 500g, 5g, 1g, 25g.