Potassium perchlorate available oxygen

Most flash and loud report effects are produced by using a relatively powerful oxidiser such as potassium perchlorate (which has a high available oxygen content), together with a hnely-divided metal fuel (M) that can react according to reaction (10.3). 

It is used for coloured flame compositions, but the burning rate is not so great as it is with potassium chlorate compositions. On burning it does not smell of chlorine gas. The available oxygen per 1 gram of potassium perchlorate -amounts to 0. 62grams, which is I.I8 times more than that of potassium chlorate. 

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