Abstract: Certain compositions comprising trifluoroiodomethane with physically-acting combustion suppressants, wherein the compositions exhibit strong synergistic combustion suppression and are useful for suppressing the combustion of many fuels. The compositions are thermally stable, compatible, non-ozone-depleting, low global warming, have reduced toxicity compared to pure trifluoroiodomethane, can be effective in lower weights and volumes than most other agents, and can be more cost-effective than current combustion suppressants.

Abstract: Nonflammable gas compositions of ethylene oxide and a flammability suppressant comprising carbon dioxide and trifluoromethyl iodide, wherein the gas blends or compositions are useful in sterilization, fumigation, and disinfection. The present gas compositions are atmospherically friendly and are more cost-effective to produce than current nonflammable medium-pressure ethylene oxide gas mixtures.