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7440-00-8

Basic Information
CAS No.: 7440-00-8
Name: Neodymium
Molecular Structure:
Molecular Structure of 7440-00-8 (Neodymium)
Formula: Nd
Molecular Weight: 144.24
Synonyms: NEODYMIUM
EINECS: 231-109-3
Density: 7.003 g/mL at 25 ºC (lit.)
Melting Point: 1024 ºC
Boiling Point: 3074 ºC(lit.)
Solubility: Soluble in dilute acids. Decomposes in water.
Appearance: grey metal ingot
Hazard Symbols: IrritantXi;FlammableF
Risk Codes: R11-36/37/38-14/15
Safety: S16-26-33-36/37/39-43
Transport Information: UN 3208 4.3/PG 1
PSA: 0.00000
LogP: 0.00000
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  • 7440-00-8             Nd              NEODYMIUM

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History

 Neodymium (CAS NO.7440-00-8) was discovered by Baron Carl Auer von Welsbach, an Austrian chemist, in Vienna in 1885. He separated neodymium, as well as the element praseodymium, from a material known as didymium by means of fractional crystallization of the double ammonium nitrate tetrahydrates from nitric acid, while following the separation by spectroscopic analysis; however, it was not isolated in relatively pure form until 1925. The name neodymium is derived from the Greek words neos, new, and didymos, twin.Double nitrate crystallization was the means of commercial neodymium purification until the 1950s. Lindsay Chemical Division was the first to commercialize large-scale ion-exchange purification of neodymium. Starting in the 1950s, high purity (above 99%) neodymium was primarily obtained through an ion exchange process from monazite, a mineral rich in rare earth elements. The metal itself is obtained through electrolysis of its halide salts. Currently, most neodymium is extracted from bastnäsite, (Ce,La,Nd,Pr)CO3F, and purified by solvent extraction. Ion-exchange purification is reserved for preparing the highest purities (typically >99.99 %). The evolving technology, and improved purity of commercially available neodymium oxide, was reflected in the appearance of neodymium glass that resides in collections today. Early neodymium glass made in the 1930s, have a more reddish or orange tinge than modern versions, which are more cleanly purple, due to the difficulties in removing the last traces of praseodymium when the fractional crystallization technology had to be relied on.

Specification

The Neodymium, with its cas registry number 7440-00-8, is a kind of grey metal ingot. And its product categories are including Inorganics; Rare earth; Catalysis and Inorganic Chemistry; Chemical Synthesis; Metals; Neodymium; NeodymiumMetal and Ceramic Science.

The characteristics of this chemical are as follows: (1)#H bond acceptors: 0 ; (2)#H bond donors: 0 ; (3)#Freely Rotating Bonds: 0 ; (4)Polar Surface Area: 0; (5)Exact Mass: 141.907719; (6)MonoIsotopic Mass: 141.907719; (7)Heavy Atom Count: 1; (8)Covalently-Bonded Unit Count: 1.

When you are dealing with this chemical, you should be very cautious. For one thing, it is irritating to eyes, respiratory system and skin and may cause inflammation to the skin or other mucous membranes. For another thing, it is highly flammable which may catch fire in contact with air, only needing brief contact with an ignition source, and it has a very low flash point or evolve highly flammable gases in contact with water. Besides, it could reacts violently with water, liberating extremely flammable gases.

Therefore, you should wear suitable protective clothing, gloves and eye/face protection. If in case of contact with eyes, rinse immediately with plenty of water and seek medical advice. In addition, take precautionary measures against static discharges and then keep it away from sources of ignition - No smoking.
 
In addition, you could convert the following datas into the molecular structure:
(1)Canonical SMILES: [Nd]
(2)InChI: InChI=1S/Nd
(3)InChIKey: QEFYFXOXNSNQGX-UHFFFAOYSA-N 

Below are the toxicity information of this chemical:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
human TDLo intracrebral 17ug/kg (0.017mg/kg) GASTROINTESTINAL: NAUSEA OR VOMITING

GASTROINTESTINAL: OTHER CHANGES

SKIN AND APPENDAGES (SKIN): SWEATING: OTHER
Journal of Clinical Investigation. Vol. 21, Pg. 447, 1942.