Neodymium chloride
[CAS# 10024-93-8]

Identification

• Classification: Inorganic chemical industry >> Inorganic salt >> Metal halides and halides >> Metal chlorides and salts
• Name: Neodymium chloride
• Synonyms: Neodymium trichloride; Neodymium(3+) chloride; Neodymium(III) chloride
• Molecular Formula: NdCl₃
• Molecular Weight: 250.60
• CAS Registry Number: 10024-93-8
• EC Number: 233-031-5
• SMILES: Cl[Nd](Cl)Cl

Properties

• Solubility: 140% w/w (water 100 ºC)
• Density: 4.134 g/mL (25 ºC)
• Melting point: 783-787 ºC
• Boiling point: 1600 ºC (760mmHg)

Safety Data

• Hazard Symbols: GHS05;GHS07;GHS09 Danger
• Hazard Statements: H315-H318-H319-H335-H400-H410
• Precautionary Statements: P261-P264-P264+P265-P271-P273-P280-P302+P352-P304+P340-P305+P351+P338-P305+P354+P338-P317-P319-P321-P332+P317-P337+P317-P362+P364-P391-P403+P233-P405-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin irritation	Skin Irrit.	2	H315
Serious eye damage	Eye Dam.	1	H318
Chronic hazardous to the aquatic environment	Aquatic Chronic	1	H410
Acute hazardous to the aquatic environment	Aquatic Acute	1	H400
Specific target organ toxicity - single exposure	STOT SE	3	H335
Eye irritation	Eye Irrit.	2	H319
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412
Specific target organ toxicity - single exposure	STOT SE	1	H370
Skin sensitization	Skin Sens.	1	H317
Substances or mixtures corrosive to metals	Met. Corr.	1	H290
Chronic hazardous to the aquatic environment	Aquatic Chronic	2	H411

Discovory and Applicatios

The history of neodymium chloride dates back to the discovery of neodymium itself. It was discovered in 1885 by Austrian chemist Carl Auer von Welsbach when he separated neodymium from neodymium and praseodymium, a mixture that had previously been thought to be a single element. The neodymium salt, neodymium chloride, was subsequently synthesized and found important uses in a variety of scientific and industrial fields. Neodymium chloride is usually found as a white to light pink solid due to the characteristic color of the neodymium ion. It is soluble in water, forming pink or purple solutions due to the hydration of the neodymium ions.

Neodymium chloride is a precursor for the production of neodymium iron boron (NdFeB) magnets, which are among the strongest permanent magnets known. These magnets are essential in a variety of applications, including electric motors, hard drives, wind turbine generators, and headphones. The compound is used to form magnetic alloys that are essential to many high-tech devices, using the properties of neodymium to enhance the magnetic properties of these materials.

Neodymium chloride is a key ingredient in the manufacture of neodymium-doped crystals such as Nd:YAG (neodymium-doped yttrium aluminum garnet). These crystals are used in solid-state lasers, with applications ranging from medical procedures to industrial cutting and welding, as well as laser rangefinders and scientific research. Neodymium compounds, including neodymium chloride, are used to color glass and ceramics. They give glass a distinctive purple hue and are used in decorative glassware and in specialized optical filters that selectively absorb specific wavelengths of light.

Neodymium chloride acts as a catalyst or precursor in a variety of chemical reactions, particularly in organic synthesis and polymerization processes. Its catalytic properties can be used to increase reaction rates and the efficiency of chemical processes. It is used to prepare other neodymium compounds that are used in the development of advanced materials, including synthetic rubber and plastic polymerization catalysts.

Neodymium chloride is used to manufacture specialty lighting products, including neodymium-containing light bulbs that produce a cleaner, more natural light than standard incandescent bulbs. Neodymium chloride is used in neodymium metallurgy, particularly in the production of neodymium alloys used in the steel industry to increase steel strength and corrosion resistance.

Neodymium chloride should be handled with care, using appropriate safety procedures to avoid inhalation or ingestion. It is recommended to be properly stored in a closed container to prevent moisture absorption, as it is hygroscopic. As with many rare earth compounds, the mining and processing of neodymium must comply with environmental regulations to minimize ecological impacts and ensure sustainable use of rare earth resources.

References

1. Synthesis: Moeller, T., et al. (1950). "Preparation of neodymium(III) chloride from neodymium oxide." Inorganic Chemistry, 2(1), 45�49.

2. Applications: Cotton, S. A. (1997). "Lanthanide chlorides in catalysis: Neodymium(III) chloride." Chemical Society Reviews, 26(1), 27�33.
DOI: 10.1039/CS9972600027

3. Review: B�nzli, J.-C. G. (2010). "Lanthanide luminescence: Neodymium(III) chloride." Chemical Reviews, 110(5), 2729�2755.
DOI: 10.1021/cr900362v