3811-04-9

  • English Name: Potassium Chlorate
  • CAS Number: 3811-04-9
  • Molecular Formula: KClO₃
  • Molecular Weight: 122.55
  • UN Number: 1485

Physical Properties

  • Appearance: White crystalline powder or colorless crystals.
  • Odor: Odorless.
  • Density: 2.32 g/cm³.
  • Melting Point: 356°C.
  • Boiling Point: 400°C.
  • Solubility in Water: 73 g/L at 20°C.

Chemical Properties

  • Oxidizing Agent: Strong oxidizer; decomposes to release oxygen at high temperatures (above 400°C).
  • Reactivity: Forms explosive mixtures with organic materials, sulfur, phosphorus, and metal powders.
  • Thermal Decomposition:
    • 2KClO₃ → 2KCl + 3O₂ (in the presence of a catalyst like MnO₂).
    • Reacts with concentrated sulfuric acid to form unstable chloric acid and chlorine gas.

Uses

  • Fireworks and Pyrotechnics: Used as an oxidizer in fireworks and matches.
  • Rocketry: Used in rocket propellants.
  • Laboratory: Used as an oxidizing agent and in the preparation of oxygen.
  • Medical: Used as a disinfectant and in the manufacture of certain pharmaceuticals.
  • Agriculture: Used as a herbicide.

Safety Information

  • Health Hazards: Toxic; ingestion can cause severe poisoning.
  • Storage: Store in a cool, dry place, away from organic materials and reducing agents.
  • First Aid:
    • Skin Contact: Rinse with water.
    • Eye Contact: Rinse with water for at least 15 minutes.
    • Ingestion: Drink water and seek medical attention.
  • Transportation: Classified as a 5.1 oxidizer; UN Number 1485.

Environmental Information

  • Ecotoxicity: Harmful to aquatic life.

Regulatory Information

  • Hazard Codes: Xn (Harmful), O (Oxidizer), N (Dangerous for the environment).
  • Risk Phrases: R9 (Explosive when mixed with combustible material), R20/22 (Harmful by inhalation and if swallowed), R51/53 (Toxic to aquatic organisms, may cause long-term adverse effects).
  • Safety Phrases: S13 (Keep away from food, drink, and animal feeding stuffs), S16 (Keep away from sources of ignition), S27 (Take off contaminated clothing), S61 (Avoid release to the environment).

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