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Ammonium heptamolybdate tetrahydrate, likewise referred to as ammonium molybdate, is a white, crystalline inorganic substance with the chemical formula (NH₄)₆Mo₇O₂₄⋅4H₂O. It's one of the most typical type of ammonium heptamolybdate as well as has a number of intriguing homes plus applications.
Properties:
Appearance: White, crystalline solid
CAS #: 12054-85-2
Formula: (NH₄)₆Mo₇O₂₄⋅4H₂O
Molar mass: 1,163.9 g/mol
Solubility in water: 65.3 g / 100 ml (at 20°C)
Density: 2.5 g/cm³
Melting point: ~90°C (loses water molecules); 190°C (decomposes)
pH: 5.3 (aqueous solution, 50 g/L)
Applications:
Analytical chemistry: It's a key component in colorimetric tests for phosphate, used in various fields like agriculture, environmental monitoring, and wastewater treatment.
Pigments and ceramics: It's used to produce molybdenum-based pigments with vibrant colors like yellow, orange, and red. These pigments are used in paints, glazes, and enamels.
Fire retardants: Ammonium heptamolybdate can be used in fire retardant formulations for textiles, plastics, and wood.
Agriculture: It can be used as a source of molybdenum, an essential micronutrient for plants.
Safety:
Ammonium heptamolybdate is generally considered a low-toxicity compound, but it can cause irritation to the skin, eyes, and respiratory system upon contact or inhalation.
It's important to handle it with proper precautions, including wearing gloves, eye protection, and a respirator when necessary.
Additional information:
You can find more detailed information about the properties, applications, and safety of ammonium heptamolybdate tetrahydrate in safety data sheets from chemical suppliers like Sigma-Aldrich or Hengchang Molybdenum Industry.
If you have any specific questions about its use or handling, it's best to consult a qualified professional or refer to relevant safety guidelines.