Patent ID: 8357352

Claim:
An aerosol suspension consisting of: particles of active substance with chemically bound water, at least 85 wt. % of a propellant gas TG 227 ea or TG 227 ea in admixture with at least one other propellant gas selected from among propane, butane, pentane, dimethylether, CHClF 2 , CH 2 F 2 , CF 3 CH 3 , isobutane, isopentane and neopentane, wherein the aerosol suspension contains additional free water in addition to the water chemically bound to the active substance; wherein said active substance is selected from ipratropium bromide monohydrate and tiotropium bromide monohydrate; and wherein the propellant gas TG 227 ea, or mixtures with this propellant gas, form a concentration of water between 50 and 230 ppm in the aerosol suspension.