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1312-81-8

Basic Information
CAS No.: 1312-81-8
Name: Lanthanum oxide
Molecular Structure:
Molecular Structure of 1312-81-8 (Lanthanum oxide)
Formula: La2O3
Molecular Weight: 325.82
Synonyms: Dilanthanumoxide;Dilanthanum trioxide;Lanthana;Lanthanum sesquioxide;Lanthanum trioxide;Lanthanum(3+) oxide;Lanthanum(III) oxide;
EINECS: 215-200-5
Density: 6.51 g/cm3
Melting Point: 2315°C (2590 K)
Boiling Point: 4200°C (4500 K)
Flash Point: 4200°C
Solubility: insoluble in water
Appearance: white powder
Hazard Symbols: IrritantXi
Risk Codes: 36/37/38
Safety: 26-36/39
Transport Information: N/A
PSA: 43.37000
LogP: -0.30600
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  • Lanthanum(III) oxide, 99.9%

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Consensus Reports

Reported in EPA TSCA Inventory.

Specification

The Lanthanum oxide, with the CAS registry number 1312-81-8, is also known as Lanthanum(III) oxide. It belongs to the product categories of Inorganics; Lanthanum; 57: La; LanthanumMaterials Science; LanthanumMetal and Ceramic Science; Nanoparticles: Oxides, Nitrides, and Other Ceramics Nanomaterials; Catalysis and Inorganic Chemistry; Chemical Synthesis; Nanomaterials; Nanopowders and Nanoparticle Dispersions; Oxides; Alternative Energy; Electrolytes Chemical Synthesis; Materials Science; Atomic Absorption Spectroscopy (AAS); Lanthanum Spectroscopy; Matrix Modifiers (for Graphite Furnace AAS). Its EINECS registry number is 215-200-5. This chemical's molecular formula is La2O3 and molecular weight is 325.81. This chemical's classification code is Skin / Eye Irritant.

Physical properties of Lanthanum oxide: (1)#H bond acceptors: 3; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 2; (4)Polar Surface Area: 43.37 Å2.

Preparation: this chemical can be prepared by La(OH)3 which is dried at 200 ℃, burning at 500 ℃, oxide decomposition at more than 840 ℃. At last, you can gain Lanthanum oxide.

Uses of Lanthanum oxide: It is used to develop ferroelectric materials, and in optical materials. Lanthanum oxide is used to make optical glasses, to which this oxide confers increased density, refractive index, and hardness. La2O3 is an ingredient for the manufacture of piezoelectric and thermoelectric materials. Automobile exhaust-gas converters contain La2O3. La2O3 is also used in X-ray imaging intensifying screens, phophors as well as dielectric and conductive ceramics. La2O3 has been examined for the oxidative coupling of methane. La2O3 films can be deposited by many different methods, including: chemical vapor disposition, thermal oxidation, sputtering, and spray pyrolysis.

When you are using this chemical, please be cautious about it as the following:
This chemical may cause inflammation to the skin or other mucous membranes. It is irritating to eyes, respiratory system and skin. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. Whenever you will contact it, please wear suitable protective clothing and eye/face protection.

You can still convert the following datas into molecular structure:
(1)SMILES: O=[La]O[La]=O
(2)InChI: InChI=1/2La.3O/rLa2O3/c3-1-5-2-4
(3)InChIKey: KTUFCUMIWABKDW-JCEZXFMDAU

The toxicity data is as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LD50 oral > 9968mg/kg (9968mg/kg)   Environmental Quality and Safety, Supplement. Vol. 1, Pg. 1, 1975.