Lanthanum oxide

Description

Lanthanum oxide · CAS 1312-81-8 · La2O3. UNII 4QI5EL790W. Boiling Point: 3620 °C @760 [mm Hg]; Melting Point: 2304 °C; Density: 6.51 @25 °C.

Identification

CAS Registry Number	1312-81-8
PubChem CID	150906
Molecular formula	La2O3
IUPAC name	bis(lanthanum(3+));tris(oxygen(2-))
UNII (FDA)	4QI5EL790W

Computed Descriptors

Molecular Weight	325.809
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	0
Exact Mass	325.79747
Monoisotopic Mass	325.79747
Topological Polar Surface Area	3
Heavy Atom Count	5
Formal Charge	0
Complexity	0

Physical & Chemical Properties

Boiling Point	3620 °C @760 [mm Hg]
Melting Point	2304 °C
Density	6.51 @25 °C

Physical description & handling notes

• Other Solid; Dry Powder; Large Crystals
• White solid; Insoluble in water; [Merck Index] Soluble in acids; [Hawley]

Regulatory Status

GHS notification summary	59.9% (370 / 618)

GHS Hazard Classification

GHS notification summary	59.9% (370 / 618)
Reported hazard statements	H315 (39.5%), H319 (40.1%), H335 (39.5%)

Documented Uses

• Used in calcium lights, optical glass, ceramics, carbon-arc electrodes, phosphors, and refractories; [Hawley]
• Glass Manufacturing [Category: Industry]
• Solids separation (precipitating) agent, not otherwise specified
• 2023: 40,000,000 - <55,000,000 lb
• 2022: 40,000,000 - <55,000,000 lb
• 2021: 25,000,000 - <40,000,000 lb

Synonyms

Lanthanum oxide; 1312-81-8; Lanthana; Lanthanum sesquioxide; Lanthanum oxide (La2O3); Dilanthanum trioxide; Dilanthanum oxide; Lanthanum(3+) oxide; Lanthanum trioxide; Lanthania (La2O3); 4QI5EL790W; La(2)O(3); RefChem:152325; DTXCID4030209; 215-200-5; 682-684-6

Frequently Asked Questions

What are the CAS number and molecular formula of Lanthanum oxide?

CAS 1312-81-8; molecular formula La2O3; molecular weight — g/mol.

What other names is Lanthanum oxide known by?

Lanthanum oxide, 1312-81-8, Lanthana, Lanthanum sesquioxide, Lanthanum oxide (La2O3), Dilanthanum trioxide.

Is Lanthanum oxide classified as hazardous?

59.9% of GHS notifications report no hazard classification (370 of 618).

What are the key physical properties of Lanthanum oxide?

Boiling Point: 3620 °C @760 [mm Hg]; Melting Point: 2304 °C; Density: 6.51 @25 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.