Yttrium nitrate hexahydrate

Yttrium nitrate hexahydrate (CAS 13494-98-9), chemical designation Y(NO₃)₃·6H₂O, is a water-soluble rare earth salt used as a precursor in advanced ceramics, electronics and energy.

Where is Yttrium nitrate hexahydrate used?

• Coatings and advanced ceramics: sol-gel and wet-chemistry precursor for yttria-stabilised zirconia (YSZ) and Y₂O₃ powders and coatings
• Electronics and solid-state lighting: precursor for phosphor materials including YAG:Ce and Y₂O₃:Eu systems in LED and display technologies
• Superconductors: preparation of YBCO films and powders, where purity grade influences electrical performance
• Solid oxide fuel cells and energy: wet-chemistry synthesis of yttria-doped ceramic powders for electrolyte components
• Catalysis: rare earth washcoat additive in catalytic converter formulations, and Lewis acid catalyst in organic synthesis research
• It is also used in aqueous solution routes where uniform stoichiometry is critical, notably thermal barrier and protective oxide coatings for automotive and aerospace.

Good to know: Related forms include the anhydrous compound (CAS 10361-93-0) and the tetrahydrate (CAS 13773-69-8). As an oxidising solid (UN 1477, Hazard Class 5.1), store away from organic materials and reducing agents; registered under REACH via the anhydrous form (CAS 10361-93-0).

Commercial specifications

• Purity grades 2N8 to 5N on a rare earth oxide basis (Y₂O₃/TREO)
• TREO content of the hexahydrate typically at or above 29 %
• High-purity 4N and 5N lots in 500 g to 1 kg sealed containers for laboratory and pilot-scale use
• Industrial quantities in UN-approved 25 kg drums