Lanthanum oxide

Reported in EPA TSCA Inventory.

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.