Holmium Oxide, Ho₂O₃, 99.9% 3N High Purity Powder

Formula: Ho₂O₃
CAS Number: 12055-62-8
Molecular Weight: 377.86 g/mol
Density: 8.41 g/cm³ at 25 °C
Melting Point: ~2,410 °C
Color: Yellowish powder (pale yellow to tan)
Solubility: Insoluble in water; soluble in acids.
Purity: 99.9% 3N (Ho₂O₃/TREO)

Holmium Oxide is a rare earth oxide used in specialty optical glass, calibration standards, and as a dopant in laser materials. It exhibits sharp absorption bands in the visible spectrum, making it valuable for spectrophotometer calibration. In glassmaking, small amounts of Ho₂O₃ can be used to alter transmission properties, particularly for UV and IR applications.