Basic information
- CAS
1312-81-8- Standard SMILES
[La+3].[La+3].[O-2].[O-2].[O-2]- InChIKey
MRELNEQAGSRDBK-UHFFFAOYSA-N- Molecular formula
- La2O3
- Average molar mass
- 325.809 g/mol
Names & identifiers
- Preferred name
- Lanthanum sesquioxide
- IUPAC
- bis(lanthanum(3+));tris(oxygen(2-))
- English name
- Lanthanum oxide
- Molecular formula
- La2O3
- Molecular weight
- 325.81
Names & synonyms
Lanthanum oxide1312-81-8LanthanaLanthanum sesquioxideLanthanum oxide (La2O3)Dilanthanum trioxideDilanthanum oxideLanthanum(3+) oxideLanthanum trioxideLanthania (La2O3)4QI5EL790WLa(2)O(3)
Show more names
Lanthanum(Ⅲ) oxideLANTHANUM OXIDE, 99.99%LANTHANUM OXIDE, 99.99%LANTHANUM OXIDE, 99.99%LANTHANUM OXIDE, 99.99%O3La2lathanialanthaniaLanthanoxidLanthan oxide99.999% (REO)
RefChem:152325DTXCID4030209215-200-5682-684-6DTXSID7051478Lanthanum(III) oxideLanthanum(III)OxideLa2O3
Database identifiers
- CAS
1312-81-8- PubChem CID
- 150906
- UNII
- 4QI5EL790W
- EC Number
- 215-200-5、682-684-6
Properties
Computed structural properties
- Topological polar surface area
- 3 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 3
- Rotatable bonds
- 0
- Heavy atoms
- 5
- Formal charge
- 0
- Complexity
- 0
Experimental & physicochemical properties
Chemical ClassesMetals -> Rare Earth Metals
SpringerMaterials Propertiesdielectric constant
Density6.51 @25 °C
Boiling Point3620 °C @760 [mm Hg]
Melting Point2304 °C
Physical Description
Other Solid; Dry Powder; Large Crystals
White solid; Insoluble in water; [Merck Index] Soluble in acids; [Hawley]
Physicochemical properties
- Melting point
- 2315 °C · 2315 °C
- Boiling point
- 4200 °C · 4200 °C
- Density
- 6.51 g/mL · 6.51 g/mL at 25 °C(lit.)
- bulk density
- 1300 kg/m3 · 1300kg/m3
- Flash point
- 4200 °C · 4200°C
- storage temp.
- no restrictions.
- solubility
- 2 O; · insoluble in H2O; soluble in dilute acid solutions
- form
- nanopowder
- color
- White to yellow
- Specific Gravity
- 6.51 · 6.51
- PH
- 9 · 9.0 (50g/l, H2O, 20℃)(slurry)
- Resistivity
- 1 · 1 ∞ 10*14 (550°C) (ρ/μΩ.cm)
- Water Solubility
- INSOLUBLE
- Specific Heat Capacity
- 0.33 J/ · Cp(crystal): 0.33 J/(g·K), at 25℃
- Sensitive
- Hygroscopic
- Crystal Structure
- Trigonal
- crystal system
- Three sides
- Merck
- 14 · 14,5363
- Space group
- 3 m1 · P3m1
- Lattice constant
- a/nm
- Symbol(GHS)
- 7 · GHS07
- Signal word
- Warning
- Hazard statements
- 320 · H320-H315-H319-H335
- Precautionary statements
- 261 · P261-P280a-P304+P340-P305+P351+P338-P405-P501a-P264-P305+P351+P338+P337+P313
- PPE
- 95 · dust mask type N95 (US), Eyeshields, Gloves
- Hazard Codes
- Xi
- Risk Statements
- 36 · 36/37/38-36
- Safety Statements
- 26 · 26-36-39
- WGK Germany
- 1 · 1
- RTECS
- 5330000 · OE5330000
- TSCA
- TSCA listed
- HS Code
- 28469000 · 28469000
- Storage Class
- 13 · 13 - Non Combustible Solids
- Toxicity
- 50 orally · LD50 orally in Rabbit: > 9968 mg/kg
- REACH Registrations
- Active
Safety & regulation
GHS classification
GHS Classification
This chemical does not meet GHS hazard criteria for 59.9% (370 of 618) of all reports.
Warning
H315 (39.5%): Causes skin irritation [Warning Skin corrosion/irritation]
P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 618 reports by companies from 15 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Not Classified
Hazard information
Regulatory Information
Chemical: Lanthanum oxide (La2O3)
Lanthanum oxide (La2O3) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Lanthanum oxide (La2O3) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)
Status: Active Update: 24-01-2023 https://echa.europa.eu/registration-dossier/-/registered-dossier/15267
Lanthanum oxide (La2O3): Does not have an individual approval but may be used under an appropriate group standard
Hazards SummarySee Lanthanum. See RARE EARTH METALS and linked occupational diseases.
Hazard Classes and Categories
Skin Irrit. 2 (39.5%)
Not Classified
Safety & protection
Protective Action Criteria (PAC)
30 [mg/m3]
330 [mg/m3]
2000 [mg/m3]
Toxicology
Adverse EffectsFibrogenic - Inducing tissue injury and fibrosis (scarring).
Safety data
- PPE
- dust mask type N95 (US), Eyeshields, Gloves
- wgk
- 1
- tsca
- TSCA listed
- rtecs
- OE5330000
- hs_code
- 28469000
- Toxicity
- LD50 orally in Rabbit: > 9968 mg/kg
- risk_code
- 36/37/38-36
- Signal word
- Warning
- Symbol(GHS)
- GHS07
- hazard_code
- Xi
- safety_code
- 26-36-39
- Storage Class
- 13 - Non Combustible Solids
- Hazard statements
- H320-H315-H319-H335
- REACH Registrations
- Active
- Precautionary statements
- P261-P280a-P304+P340-P305+P351+P338-P405-P501a-P264-P305+P351+P338+P337+P313
Chemistry & industry
Uses & manufacturing
Uses
Used in calcium lights, optical glass, ceramics, carbon-arc electrodes, phosphors, and refractories; [Hawley]
Glass Manufacturing [Category: Industry]
U.S. Production2023: 40,000,000 - <55,000,000 lb
Consumer UsesCatalyst
Industry UsesCatalyst
General Manufacturing Information
All Other Chemical Product and Preparation Manufacturing
Lanthanum oxide (La2O3): ACTIVE
Applications
UsesLanthanum oxide is used to make high-quality glass, ceramics, carbon-arc electrodes, and fluorescent lamps. Lanthanum (III) oxide was used as an analytical standard in inductively coupled plasma atomic emission spectrometry (ICP-AES) for chemical characterization of ancient pottery.
UsesLanthanum(III) oxide is used as a precursor to LAMOX fast ion conductors and superconductors. It is also used in the manufacture of optical glasses, piezoelectric and thermoelectric material. It is also useful for X-ray imaging intensifying screens, phosphors as well as dielectric and conductive ceramics. In addition, it is used as a catalyst to effect certain organic transformations. It is one of the active ingredients and finds application in thermoelectric and piezoelectric materials.
General DescriptionLanthanum (III) oxide is an alkaline earth oxide, and is a diamagnetic, isostructural analog of neodymium oxide. It is also an efficient recyclable catalyst, and can be used in coupling various aryl halides with aromatic/alkyl thiols.
Preparation methods
PreparationLanthanum oxide can be produced by direct combustion of lanthanum in oxygen or air. The oxide also may be prepared by decomposition of an oxo salt of lanthanum, such as nitrate, sulfate, carbonate, hydroxide or oxalate. La(CO3)3•8H2O → La2O3 + 3CO2 + 8H2O 2La2(C2O4)3•9H2O + 3O2 → 2La2O3 + 12CO2 + 18H2O
Upstream & downstream products
Upstream raw materials
Downstream products
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Related reactions
21 records
Compound notes
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