Неодим-ацетат

Description

Neodymium acetate, hydrate form - a salt of acetic acid and neodymium(III), a separate commercial form in relation to anhydrous neodymium acetate (CAS 6192-13-8), containing water of crystallization in the composition.

Basic Attributes

• CAS No.: 16648-22-9
• Chemical formula: C6H11NdO7
• English name: NEODYMIUM ACETATE
• Molecular weight: 339.39; molecular weight: 324.40
• Exact weight: 318.94800; clarified exact and monoisotopic mass: 321.97112
• PSA: 78.90000; adjusted PSA value: 112
• XLogP3: 0.0414

Physico-chemical characteristics

• Boiling point: 117.1 °C at 760 mm Hg. Art.
• Flash point: 40°C
• Steam pressure: 13.9 mm Hg. Art. at 25 °C

Molecular descriptors

• Hydrogen bond donors: 3
• Hydrogen bond acceptors: 6
• Heavy atoms: 13
• Molecule Complexity: 127
• Covalently linked units: 4
• Connection canonized: yes

Scope of application

Like the anhydrous form, it is used as a source of neodymium ions for laboratory and industrial synthesis - the preparation of neodymium coordination compounds, catalyst precursors and precursors of magnetic and optical materials. The choice of a hydrate form instead of an anhydrous one is relevant where a certain content of water of crystallization in the reagent is acceptable or required, and also where the parameters of vapor pressure and boiling point are important, distinguishing this form from its anhydrous analogue.

Toxicity and hazard classification

• Hazard class code: 36/37/38
• Safety instructions: 26-37/39
• Hazard label: Xi
• WGK Germany: 3

Storage

Store in a dry, well-ventilated area, in a tightly closed container, away from heat sources - a noticeable vapor pressure (13.9 mm Hg at 25 ° C) indicates a certain volatility of the components of the composition, which requires hermetically sealed packaging to maintain the stated parameters.

Difference from anhydrous form

Compared to anhydrous neodymium acetate (CAS 6192-13-8), this form differs in molecular weight, PSA value and the presence of a noticeable vapor pressure at room temperature - a parameter not present in the anhydrous salt data sheet. Such differences reflect the different composition of the crystal lattice and the content of bound water, which must be taken into account when recalculating the concentration of the active substance in solutions and when choosing a form for a specific technological process.

Scope of application in detail

Neodymium salts, including both commercial forms of acetate, are in demand as precursors for the production of neodymium-based oxide and fluoride materials - components of laser optics, glasses with special optical properties and catalyst systems. Solubility in water and stability of the solution during storage are key parameters that determine the suitability of a particular form for a particular technological scheme.