Lanthanum hydroxide

Lanthanum hydroxide (CAS 14507-19-8), systematic name lanthanum trihydroxide (La(OH)₃), is a rare earth compound produced by controlled precipitation from lanthanum salt solutions.

Where is Lanthanum hydroxide used?

• Water and wastewater treatment: removal of phosphate, arsenate and fluoride from acidic municipal and industrial effluents
• Automotive catalysis: precursor raw material for three-way catalyst (TWC) formulations
• Electronics and solar PV: phosphors, lanthanum hexaboride (LaB₆) cathode production and specialty optical glass
• Oil, gas and energy: catalyst support precursor for fluid catalytic cracking (FCC) and hydroprocessing
• Upon calcination it converts to lanthanum oxide (La₂O₃) via the oxyhydroxide (LaOOH) intermediate.

Good to know: No food-grade (E-number), USP or Ph. Eur. monograph applies; supplied exclusively for industrial and research use. Signal word Danger applies; consult the current Safety Data Sheet for personal protective equipment and storage conditions.

Commercial specifications

• REACH registered in the 100–1,000 t/a tonnage band
• Purities from 2N to 5N, quoted on a rare earth oxide basis as La₂O₃/TREO
• TREO ≥ 65 % as-received; loss on ignition (LOI) 13–15 %
• Particle size −200 mesh or finer (−325 mesh); packaging 25 kg polyethylene-lined bags or fibre drums; R&D lots 4N–5N (La₂O₃/TREO ≥ 99.99 %) in 1–5 kg