Gas generating composition for an inflatable vehicle occupant protection device

An apparatus comprising:

• an inflatable vehicle occupant protection device;
• and
• a gas generating composition which when ignited produces gas to inflate said inflatable vehicle occupant protection device, said gas generating composition consisting essentially of phase stabilized ammonium nitrate, an organic fuel, and up to about 10% by weight, based on the weight of the gas generating composition, of a binder, wherein said organic fuel consists essentially of nitroguanidine (NQ) and a supplemental, non-salt fuel selected from the group consisting of 3-nitro-1,2,4-triazole-5-one (NTO) and cyclotetramethylenetetranitramine (HMX), the weight ratio of said nitroguanidine to said supplemental non-salt fuel being in the range of about 35:65 to about 65:35, and wherein the gas generating composition is oxygen balanced for substantially complete combustion of carbon in the organic fuel to carbon dioxide and hydrogen in the organic fuel to water while minimizing the formation of oxides of nitrogen.