CAS 161760-09-4 appears in our catalog under these names: Tenofovir Impurity 38, ((Tosyloxy)methyl)phosphonic acid, 98%, Tenofovir Impurity 112. Offered by: Chemat Brand, Hubei YoungXin. Available pack sizes: on request, 10mg, 25mg, 50mg, 100mg, 200mg.