7761-88-8

  • English Name: Silver Nitrate
  • CAS Number: 7761-88-8
  • Molecular Formula: AgNO₃
  • Molecular Weight: 169.87 g/mol

Physical Properties

  • Appearance: White crystalline solid or colorless transparent prisms.
  • Melting Point: 212°C.
  • Boiling Point: 444°C.
  • Density: 4.35 g/cm³ at 25°C.
  • Solubility:
    • Highly soluble in water (219 g/100 mL at 20°C).
    • Soluble in ethanol, ammonia, and glycerol; slightly soluble in ether.
  • Stability: Stable in air and light, but decomposes when in contact with organic materials or sulfides.

Chemical Properties

  • Reactivity:
    • Strong oxidizing agent.
    • Decomposes at high temperatures (above 450°C) to form silver, nitrogen oxides, and oxygen.
    • Reacts with proteins to form a brown precipitate.
  • Photoreactivity: Sensitive to light; darkens upon exposure to organic materials.

Uses

  • Photography: Used in photographic emulsions for X-ray films, movie films, and photographic papers.
  • Electronics: Used in the production of conductive adhesives, gas purifiers, and molecular sieves.
  • Medical Applications: Used as an antiseptic, disinfectant, and for cauterizing wounds.
  • Analytical Chemistry: Used as a reagent for detecting chloride, bromide, and iodide ions.
  • Electroplating: Used for silver plating in electronics and decorative applications.

Safety Information

  • Health Hazards:
    • Causes severe irritation to skin and eyes; prolonged contact may lead to silver deposition in tissues (argyria).
    • Inhalation may cause respiratory irritation.
  • First Aid:
    • Skin Contact: Rinse with plenty of water and remove contaminated clothing.
    • Eye Contact: Rinse with water for at least 15 minutes and seek medical attention.
    • Inhalation: Move to fresh air and seek medical attention.
    • Ingestion: Drink water or milk and seek medical attention.
  • Storage: Store in a cool, dry place, away from light and organic materials.

Environmental Information

  • Ecotoxicity: Highly toxic to aquatic life and may have long-term adverse effects.
  • Decomposition Products: Silver, nitrogen oxides.

Transport Information

  • UN Number: 1491.
  • Hazard Class: 6.1 (Toxic substances).
  • Packing Group: III.

Packing and shipping