Neodymium sulfate octahydrate

Neodymium sulfate octahydrate (CAS 13477-91-3), formally neodymium(III) sulfate octahydrate with the formula Nd₂(SO₄)₃·8H₂O, is a water-soluble rare earth salt; an intermediate for catalysis, separation chemistry, and specialty materials processing.

Where is Neodymium sulfate octahydrate used?

• Catalysis: precursor or active component in heterogeneous catalyst systems
• Impregnation routes: controlled deposition of neodymium onto support materials
• Oil, gas, and energy: catalyst precursor in refining-related formulations and rare earth-modified zeolites
• Building and construction chemistry: intermediate in pigment and glass-colourant production, imparting violet-to-purple absorption
• Ceramic and glass: specified against Nd₂O₃/TREO content for colour consistency
• Rare earth hydrometallurgy: separation intermediate in solvent extraction or ion-exchange purification trains
• Catalyst manufacturers use neodymium compounds at this purity level as dopants and promoters.

Good to know: No specific pharmacopoeial monograph (USP, Ph. Eur.) applies; procurement is governed by internal specifications referencing TREO and Nd₂O₃/TREO purity criteria. Not to be confused with the anhydrous form (CAS 10101-95-8).

Commercial specifications

• Nd₂O₃/TREO ≥ 99 % to ≥ 99.99 %
• TREO content of the salt generally 45–47 %
• Grades from 2N to 4N REO
• Packaging: 1–5 kg containers for high-purity lots and laboratory quantities; 25 kg drums or fibre kegs standard for technical-grade bulk supply