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💍inorganic chemistry ii review

Calcium Molybdate

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

Calcium molybdate is an inorganic compound with the formula CaMoO₄, commonly used as a pigment and a precursor for other molybdenum compounds. This compound has gained attention for its bright yellow color and high stability, making it suitable for applications in paints, coatings, and plastics. Its significance in the field of pigments lies in its non-toxic nature and the ability to produce vivid colors without harmful substances.

5 Must Know Facts For Your Next Test

  1. Calcium molybdate is often used as a yellow pigment in industrial applications due to its excellent lightfastness and durability.
  2. It is synthesized by reacting calcium carbonate with ammonium molybdate at high temperatures.
  3. This compound is considered environmentally friendly compared to other yellow pigments, as it does not contain lead or cadmium.
  4. Calcium molybdate exhibits fluorescence under UV light, making it useful in certain specialized applications.
  5. In addition to its use as a pigment, calcium molybdate serves as a precursor in the production of molybdenum-based catalysts.

Review Questions

  • What are the key properties of calcium molybdate that make it suitable for use as an inorganic pigment?
    • Calcium molybdate is favored as an inorganic pigment because of its bright yellow color, high stability, and excellent lightfastness. These properties ensure that the pigment does not fade over time when exposed to sunlight or harsh environmental conditions. Additionally, being non-toxic makes it a safe choice for various applications, including paints and coatings.
  • Discuss how calcium molybdate compares to traditional pigments in terms of environmental impact and safety.
    • Unlike traditional pigments such as cadmium yellow or lead chromate, which contain toxic heavy metals, calcium molybdate is considered a safer alternative due to its non-toxic composition. This makes it environmentally friendly, as it reduces the risk of harmful exposure to humans and wildlife. The use of calcium molybdate aligns with current trends toward sustainable materials in industries focused on reducing environmental harm.
  • Evaluate the potential future applications of calcium molybdate beyond its current uses in pigments and coatings.
    • The future applications of calcium molybdate could expand significantly due to ongoing research into its properties. Its role as a precursor for molybdenum-based catalysts opens doors for advancements in chemical processes, particularly in the petroleum industry. Additionally, its fluorescence under UV light could lead to innovative uses in security inks or specialty lighting products, marking a potential shift towards multifunctional materials in various technological fields.