CAS 5689-33-8 appears in our catalog under these names: Ketoprofen EP Impurity H, 3-(Cyanomethyl)benzoic Acid, 3-(Cyanomethyl)benzoic acid 97%, 3-(cyanomethyl)benzoic acid, 97%, 97%, 3-(Cyanomethyl)benzoic acid, min. 95 %, 10 g. Offered by: Chemat Brand, TRC, Mikromol, Biosynth, Ambeed. Available pack sizes: on request, 1g, 250mg, 25mg, 25g, 10g, 50g, 5g.