🧪 Dysprosium(III) carbonate tetrahydrate

Physical and chemical properties

Chemical name: Dysprosium(III) Carbonate Tetrahydrate
Chemical formula: Tetrahydrate reported as C3H8Dy2O13\mathrm{C_3H_8Dy_2O_{13}}; hydrated form generally noted as Dy2(CO3)3⋅xH2O\mathrm{Dy_2(CO_3)_3 \cdot xH_2O}
CAS number: 38245-35-1
EC number: 225-770-7
Molecular weight: ~577.09 g/mol (tetrahydrate, reported); ~505.03 g/mol on anhydrous basis
Appearance: White powder; hygroscopic tendency reported
Melting/decomposition: No sharp melting; decomposes to Dy2O3\mathrm{Dy_2O_3} upon heating
Solubility: Insoluble in water; soluble in acids

Catalysis and materials: Precursor for dysprosium oxide (Dy2O3)\mathrm{(Dy_2O_3)} used in ceramics, catalysts, and magnetic materials workflows.
Optical and electronic uses: Feedstock for Dy\mathrm{Dy}-containing oxides in thin‑film targets and vacuum processes after conversion to Dy2O3\mathrm{Dy_2O_3}.
Nanotechnology: Source material for Dy2O3\mathrm{Dy_2O_3} nanoparticles via precipitation/calcination routes.

Purity grades commonly listed include 99.99% (trace metals) and 99.999%, depending on supplier and application.

Item	Information
CAS No	38245-35-1
EC No	225-770-7
Other names	Dysprosium carbonate tetrahydrate; Dysprosium(III) carbonate hydrate; Dy₂(CO₃)₃·xH₂O

Sources:

Classification: Irritation hazards commonly indicated (H315, H319, H335); handle as a laboratory/industrial chemical with standard PPE. Store dry and sealed due to hygroscopicity.
Processing note: Insoluble in water; convert via acid dissolution followed by controlled precipitation/calcination to obtain Dy2O3\mathrm{Dy_2O_3}.

Dysprosium oxide (Dy2O3\mathrm{Dy_2O_3}): Direct use in ceramics, magnets, and coatings; often the target phase for functional applications.
Dysprosium hydroxide (Dy(OH)3\mathrm{Dy(OH)_3}): Alternative precursor convertible to oxide.
Lanthanide carbonates (e.g., La2(CO3)3\mathrm{La_2(CO_3)_3}, Pr2(CO3)3\mathrm{Pr_2(CO_3)_3}, Nd2(CO3)3\mathrm{Nd_2(CO_3)_3}): Comparable intermediates for oxide production in similar process chains.

Starting material: Dysprosium‑containing rare‑earth solutions or salts; carbonate precipitation followed by filtration, drying, and hydrate control.
Grades and purity: Technical to high‑purity; suppliers list 99.99% (trace metals basis) and up to 99.999% for critical applications.
Typical listing: Hydrated carbonate supplied as powder; ambient shipping and room‑temperature storage noted by vendors