Triamcinolone Acetonide (inhalation aerosol) DESCRIPTION NewsLinks Triamcinolone acetonide, USP, the active ingredient in Azmacort Inhalation Aerosol, is a corticosteroid with a molecular weight of 434.5 and with the chemical designation 9-Fluoro-11b , 16a , 17, 21-tetrahydroxypregna-1, 4-diene-3, 20-dione cyclic 16, 17-acetal with acetone. (C24H31FO6). Azmacort Inhalation Aerosol is a ...