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More of a formulation than a formula, Strontium Nitrate is a weak oxidizer and responsible for the red color of flame, Potassium Nitrate is a strong oxidizer and also burns with a red flame, and potassium perchlorate is a strong oxidizer and burns with red flame. The fuels used in a road flare are sulfur, charcoal,sawdust, aluminum powder and magnesium powder. The proportions of the various fuels and oxidizers vary with different manufacturers. Also note that aluminum powder and magnesium powders are used to brighten the flames and sawdust subdues the flame and prolongs the burn. The compositions are similar to black powder (gunpowder).

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Q: What is a road flares chemical formula?
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