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Cerium Sulfate (Ce(SO₄)₂·4H₂O) is a yellow crystalline compound valued for its strong oxidizing properties and role in environmental and chemical applications. With a CAS number of 10294-42-5 and a molecular weight of 404.28 g/mol (hydrated form), this compound offers purity levels of 99.9%-99.99% (4N), featuring high solubility in sulfuric acid (200 g/L at 20°C) and reversible redox behavior between Ce³+ and Ce⁴+. Its unique ability to act as a stable oxidizing agent makes it indispensable in catalysis, water treatment, and material synthesis.
1. Strong Oxidizing Power: Ce⁴+ ions exhibit a standard reduction potential of 1.72 V, enabling efficient oxidation of organic pollutants and metal ions in aqueous systems.
2. Redox Reversibility: Easily switches between Ce³+ and Ce⁴+ states, critical for regenerating catalysts in automotive exhaust systems and chemical reactors.
3. High Purity Control: Strict purification reduces iron, sodium, and potassium levels to <10 ppm, ensuring high selectivity in redox reactions.
4. Thermal Decomposition Control: Releases water of crystallization at 100-150°C and decomposes to CeO₂ at 600-700°C, yielding a nanocrystalline oxide with high surface area (80-100 m²/g).
5. Acid Stability: Maintains solubility in concentrated sulfuric acid (98%), supporting its use in aggressive chemical processing environments.
• Catalytic Converters: A key component in three-way catalysts (TWC), storing and releasing oxygen to convert CO, NOx, and HC into harmless gases at 300-800°C.
• Water Purification: Oxidizes arsenite (As³+) to arsenate (As⁵+) in drinking water treatment, facilitating subsequent removal by adsorption on iron oxides.
• Polymer Degradation: Used in photoinitiators for UV-curable coatings, generating free radicals to initiate cross-linking reactions in acrylate-based polymers.
• Research Reagents: Serves as a titrant in redox volumetry (Ce(IV) sulfate method) for determining the concentration of reducing agents like Fe²+ and I⁻.
• Ceramic Coatings: Deposited as CeO₂ films on gas turbine blades, enhancing thermal barrier properties and resisting hot corrosion in sulfur-rich environments.
Q: What is the primary advantage of Cerium Sulfate over Cerium Oxide in catalysis?
A: The sulfate form provides better dispersibility in liquid phases, enabling homogeneous redox reactions without additional surfactants.
Q: Can it be used in alkaline solutions?
A: No, Ce⁴+ hydrolyzes in neutral to alkaline conditions; use in acidic media (pH < 4) to maintain ionic stability.
Q: How does temperature affect its oxidizing capacity?
A: Oxidation efficiency increases with temperature, reaching peak activity at 60-80°C for organic pollutant degradation in wastewater systems.
Q: Is there a risk of cerium leaching into the environment?
A: Strict process control ensures effluent cerium concentrations <1 ppb, compliant with EPA guidelines for industrial discharges.
Q: Can it be used in the synthesis of cerium-doped nanomaterials?
A: Yes, its water-soluble nature enables precise control over Ce³+/Ce⁴+ ratios in hydrothermal synthesis of core-shell nanoparticles for energy storage.
| Material Name | Cerium Sulfate or Cerium Sulfate Tetrahydrate |
| Formula | Ce(SO₄)₂·4H₂O |
| CAS No. | 10294-42-5 |
| EINECS NO. | 237-029-5 |
| Molecular Weight | 405.3 |
| Appearance | Yellow or orange powder |
| TREO | 36% min |
| Purity (CeO₂/REO) | 99.9%-99.999% |
PURITY | 3N | 4N | 5N |
TREO%MIN | 36 | 36 | 36 |
CeO2/TREO | 99.9 | 99.99 | 99.999 |
Fe2O3 | 0.005 | 0.001 | 0.0005 |
SiO2 | 0.005 | 0.002 | 0.001 |
CaO | 0.005 | 0.001 | 0.001 |
Na2O | 0.005 | 0.002 | 0.001 |
PbO | 0.002 | 0.001 | 0.001 |
Cerium Sulfate (Ce(SO₄)₂·4H₂O) is a yellow crystalline compound valued for its strong oxidizing properties and role in environmental and chemical applications. With a CAS number of 10294-42-5 and a molecular weight of 404.28 g/mol (hydrated form), this compound offers purity levels of 99.9%-99.99% (4N), featuring high solubility in sulfuric acid (200 g/L at 20°C) and reversible redox behavior between Ce³+ and Ce⁴+. Its unique ability to act as a stable oxidizing agent makes it indispensable in catalysis, water treatment, and material synthesis.
1. Strong Oxidizing Power: Ce⁴+ ions exhibit a standard reduction potential of 1.72 V, enabling efficient oxidation of organic pollutants and metal ions in aqueous systems.
2. Redox Reversibility: Easily switches between Ce³+ and Ce⁴+ states, critical for regenerating catalysts in automotive exhaust systems and chemical reactors.
3. High Purity Control: Strict purification reduces iron, sodium, and potassium levels to <10 ppm, ensuring high selectivity in redox reactions.
4. Thermal Decomposition Control: Releases water of crystallization at 100-150°C and decomposes to CeO₂ at 600-700°C, yielding a nanocrystalline oxide with high surface area (80-100 m²/g).
5. Acid Stability: Maintains solubility in concentrated sulfuric acid (98%), supporting its use in aggressive chemical processing environments.
• Catalytic Converters: A key component in three-way catalysts (TWC), storing and releasing oxygen to convert CO, NOx, and HC into harmless gases at 300-800°C.
• Water Purification: Oxidizes arsenite (As³+) to arsenate (As⁵+) in drinking water treatment, facilitating subsequent removal by adsorption on iron oxides.
• Polymer Degradation: Used in photoinitiators for UV-curable coatings, generating free radicals to initiate cross-linking reactions in acrylate-based polymers.
• Research Reagents: Serves as a titrant in redox volumetry (Ce(IV) sulfate method) for determining the concentration of reducing agents like Fe²+ and I⁻.
• Ceramic Coatings: Deposited as CeO₂ films on gas turbine blades, enhancing thermal barrier properties and resisting hot corrosion in sulfur-rich environments.
Q: What is the primary advantage of Cerium Sulfate over Cerium Oxide in catalysis?
A: The sulfate form provides better dispersibility in liquid phases, enabling homogeneous redox reactions without additional surfactants.
Q: Can it be used in alkaline solutions?
A: No, Ce⁴+ hydrolyzes in neutral to alkaline conditions; use in acidic media (pH < 4) to maintain ionic stability.
Q: How does temperature affect its oxidizing capacity?
A: Oxidation efficiency increases with temperature, reaching peak activity at 60-80°C for organic pollutant degradation in wastewater systems.
Q: Is there a risk of cerium leaching into the environment?
A: Strict process control ensures effluent cerium concentrations <1 ppb, compliant with EPA guidelines for industrial discharges.
Q: Can it be used in the synthesis of cerium-doped nanomaterials?
A: Yes, its water-soluble nature enables precise control over Ce³+/Ce⁴+ ratios in hydrothermal synthesis of core-shell nanoparticles for energy storage.
| Material Name | Cerium Sulfate or Cerium Sulfate Tetrahydrate |
| Formula | Ce(SO₄)₂·4H₂O |
| CAS No. | 10294-42-5 |
| EINECS NO. | 237-029-5 |
| Molecular Weight | 405.3 |
| Appearance | Yellow or orange powder |
| TREO | 36% min |
| Purity (CeO₂/REO) | 99.9%-99.999% |
PURITY | 3N | 4N | 5N |
TREO%MIN | 36 | 36 | 36 |
CeO2/TREO | 99.9 | 99.99 | 99.999 |
Fe2O3 | 0.005 | 0.001 | 0.0005 |
SiO2 | 0.005 | 0.002 | 0.001 |
CaO | 0.005 | 0.001 | 0.001 |
Na2O | 0.005 | 0.002 | 0.001 |
PbO | 0.002 | 0.001 | 0.001 |
