It is an object of the invention to provide an igniting agent containing a powder of a Mg-Al alloy having a high ignition speed and good grindability, an initiator containing the igniting agent, a gas generator incorporating the initiator, and an airbag ap...

An igniting agent composition substantially free of a lead compound, characterized in that it comprises a metal power and one or more selected from the group consisting of nitrate salt, basic nitrate salt, a metal oxide and a basic carbonate salt; and an i...