CAS 53499-40-4 appears in our catalog under these names: 2-(Benzhydryloxy)-n-methylethanamine hydrochloride, 98%, Diphenhydramine EP Impurity A HCl (Dimenhydrinate EP Impurity F HCl), N-Desmethyl Diphenhydramine Hydrochloride, >95% (HPLC), N-Desmethyl Diphenhydramine Hydrochloride, 98%, Dimenhydrinate EP Impurity F (Diphenhydramine EP Impurity A) as Hydrochloride. Offered by: Combi-blocks, Chemat Brand, TRC, AmBeed, Mikromol. Available pack sizes: 1g, 25g, 5g, on request, 100mg, 250mg, 500mg, 25mg.