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Europium Sulfide Powder EuS, CAS No 12020-65-4

Europium Sulfide Powder EuS, CAS No 12020-65-4

Europium sulfide powder (EuS) is a black or brownish-black powder with a molecular weight of 215.98 g/mol and a CAS number of 12020-65-4. It is insoluble in water and soluble in acids. Europium sulfide has magnetic properties and is used in magnetic recording, magneto-optics, and other related applications.


Compound Formula EuS
Purity 99.5%-99.99%
Appearance Black powder
Melting Point 2250 °C
Boiling Point N/A
Density 5.75 g/cm3
Solubility in H2O N/A
Crystal Phase / Structure Cubic
Exact Mass 184.893297
Monoisotopic Mass 184.893265 Da



  1. Magnetic recording media: Europium sulfide is used in magnetic recording media due to its high magnetic moment and high Curie temperature. It is used in combination with other magnetic materials such as iron, cobalt, and nickel to create high-density magnetic recording media.

  2. Magneto-optical recording: Europium sulfide is also used in magneto-optical recording applications. It is used as the magnetic layer in magneto-optical disks, where data is written and read using laser beams and a magnetic field.

  3. Spintronics: Europium sulfide is a promising material for spintronic devices. It has been used in the development of magnetic tunnel junctions, which are used in magnetic random access memory (MRAM) and other spintronic devices.

  4. Photoluminescence: Europium sulfide exhibits photoluminescence properties, which make it useful in optoelectronics applications such as light-emitting diodes (LEDs) and lasers.

  5. Catalysts: Europium sulfide has been investigated as a potential catalyst for various chemical reactions, including hydrogenation, desulfurization, and oxidation.

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