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Lanthanum

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Lanthanum

EINECS 231-099-0
CAS No. 7439-91-0 Density 6.19 g/mL at 25 °C(lit.)
Solubility Melting Point 920 °C(lit.)
Formula La Boiling Point 3464 °C(lit.)
Molecular Weight 138.91 Flash Point
Transport Information UN 3264 8/PG 3 Appearance solid
Safety 26-27-36/37/39-45-33-16-23-43 Risk Codes 11-34-23/24/25-14/15
Molecular Structure Molecular Structure of 7439-91-0 (Lanthanum) Hazard Symbols FlammableF,ToxicT
Synonyms

Lanthan;57La;Lanthanum chips;Lanthane;Lanthanum foil;Lantano;Lanthanum ingot;LANTHANUM;

 

Lanthanum History

    In 1839,Swedish chemist Carl Gustav Mosander discovered Lanthanum when he partially decomposed a sample of cerium nitrate by heating and treating the resulting salt with dilute nitric acid. From the resulting solution, he isolated a new rare earth he called lantana. in 1923,Lanthanum was isolated in relatively pure form .

Lanthanum Specification

The Lanthanum, with the CAS registry number 7439-91-0, belongs to the product categories of Inorganics; LanthanumSpectroscopy; LChemical Synthesis; AA Standard SolutionsAnalytical Standards; AAS; Alphabetic; Matrix Selection; NitrateSpectroscopy; Reference/Calibration Standards; Single Solution; Catalysis and Inorganic Chemistry; Chemical Synthesis; Lanthanum; LanthanumMetal and Ceramic Science; Metals; LanthanumReference/Calibration Standards; Analytical Reagents; Atomic Absorption Spectroscopy (AAS); Matrix Modifier SolutionsSpectroscopy; Matrix Modifiers (for Graphite Furnace AAS)Analytical/Chromatography; Standard Solutions; Trace Analysis Reagents; Metal or element. Its EINECS registry number is 231-099-0. This chemical's molecular formula is La and molecular weight is 138.91. What's more, its IUPAC name is the same with its product name. This chemical is a malleable, ductile, and soft metal that oxidizes rapidly when exposed to air. It is produced from the minerals monazite and bastnäsite using a complex multistage extraction process. Lanthanum compounds have numerous applications as catalysts, additives in glass, carbon lighting for studio lighting and projection, ignition elements in lighters and torches, electron cathodes, scintillators, and others.

Physical properties about Lanthanum are: (1)Phase: solid; (2)Density (near r.t.): 6.162 g·cm-3; (3)Liquid density at m.p.: 5.94 g·cm-3; (4)Melting point: 920 °C; (5)Boiling point: 3464 °C; (6)Heat of fusion: 6.20 kJ·mol-1; (7)Heat of vaporization: 402.1 kJ·mol-1; (8)Molar heat capacity: 27.11 J·mol-1;(9)#H bond acceptors: 0; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 0 Å2.

Uses of Lanthanum: it is used to produce other chemicals. For example, it can react with O2 to get lanthanum(III) oxide. The reaction need the temperature of 150 °C.

4 La + 3 O2 → 2 La2O3

When you are dealing with this chemical, you should be very careful. This chemical may catch fire in contact with air, only need brief contact with an ignition source and have a very low flash point or evolve highly flammable gases in contact with water. It reacts violently with water and liberates extremely flammable gases. In addition, it is toxic by inhalation, in contact with skin and if swallowed. Therefore, you should keep away from sources of ignition and not breathe gas/fumes/vapour/spray. You must wear suitable protective clothing, gloves, eye/face protection and take off immediately all contaminated clothing. In case of contacting with eyes, you should rinse immediately with plenty of water and seek medical advice. And in case of accident or if you feel unwell seek medical advice immediately.

You can still convert the following datas into molecular structure:
(1) SMILES: [La]
(2) InChI: InChI=1S/La
(3) InChIKey: FZLIPJUXYLNCLC-UHFFFAOYSA-N

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