A nitrogen gas generator

A nitrogen gas generator comprising:

• a housing having two ends, ignition means at one end of the housing and a gas outflow opening at the other end of the housing,
• a volume of a filter at the outflow opening,
• a volume of solid propellant comprising of between 70 and 90 wt % of sodium azide, between 1 and 15 wt % of a binder, between 0.1 and 20 wt % of a coolant and between 1 and 10 wt % of iron (III) oxide as present between the ignition means and the volume of filter, and
• wherein between the ignition means and the volume of solid propellant an active layer is present and wherein the active layer comprises between 60 and 90 wt % of sodium azide, between 1 and 15 wt % of a binder, between 0.1 and 10 wt % of a coolant and between 5 and 30 wt % of iron (III) oxide, wherein the content of iron (III) oxide in the active layer is higher than the content of iron(III)oxide in the solid propellant.