What is the most common oxidizer in commercially available high power composite solid rocket motors?

The most common oxidizer in commercially available high-power composite solid rocket motors is Ammonium Perchlorate. This oxidizer is favored because it has a high energy content and stability, which contributes to the overall performance of solid rocket propellants. Ammonium Perchlorate allows for better energy density and provides a higher specific impulse compared to other potential oxidizers. Its chemical properties make it suitable for use in various propellant formulations, providing the necessary performance characteristics needed for high-power rocketry.

In addition, the manufacturing processes and safety measures associated with Ammonium Perchlorate are well established in the industry, allowing for it to be produced at a scale and consistency that meets the demands of high-power rocketry applications. This makes it a reliable choice among rocketeers and manufacturers alike.