Ammonium perchlorate

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Ammonium perchlorate


Ammonium perchlorate (AP) is an inorganic compound with the formula NH₄ClO₄. It is a colorless or white solid that is soluble in water. It is a powerful oxidizer. Combined with a fuel, it can be used as a rocket propellant. Its chemical structure consists of the perchlorate ion, ClO₄⁻, with ammonium, NH₄⁺.

Production[edit | edit source]

Ammonium perchlorate is produced by the reaction between ammonia (NH₃) and perchloric acid (HClO₄). This process involves the careful control of the reaction conditions to prevent the formation of unwanted byproducts. The product is then purified, typically through crystallization.

Uses[edit | edit source]

The primary use of ammonium perchlorate is as an oxidizer in rocket propellant formulations for solid rocket motors. It is a key component in the Space Shuttle Solid Rocket Boosters, military missiles, and various types of fireworks. In these applications, it is mixed with a fuel (often a powdered metal such as aluminum) to create a composite propellant.

Safety and Environmental Concerns[edit | edit source]

Ammonium perchlorate is a strong oxidizer, which means it can react explosively with combustible materials. Handling and storage of AP require strict safety measures to prevent accidental ignition. Environmental concerns have also been raised regarding the impact of perchlorate on water sources, as it can interfere with thyroid function in humans and wildlife. Regulatory agencies have established guidelines for perchlorate levels in drinking water to address these concerns.

Decomposition[edit | edit source]

Upon heating, ammonium perchlorate decomposes exothermically into nitrogen, oxygen, water vapor, and hydrochloric acid (HCl). This decomposition reaction is highly energetic and is the basis for its use in rocket propellants.

Regulatory Aspects[edit | edit source]

Due to its potential health and safety risks, the production, storage, and use of ammonium perchlorate are regulated by various governmental agencies. These regulations are designed to ensure safe handling practices and to minimize environmental impact.

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Contributors: Prab R. Tumpati, MD