The present invention relates to a pyrotechnic gas generator consisting of a composition comprising guanidine nitrate, potassium perchlorate and basic copper nitrate. Characteristically, potassium perchlorate, accounts for 20% 8% of the total weight of the pyrotechnic gas generating material, and at least said composition is selected from the mixed metal oxides, semi-metal oxide further comprising one oxide, one oxide of 1% to 5% of the total weight of the pyrotechnic gas generating material as well as have a melting point lower than the combustion temperature of the pyrotechnic gas generating material at least I have accounted for. One oxide improves the combustion in the low pressure of the pyrotechnic gas generating material at least. [Selection] Figure Figure 1
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