Bayville Chemical Supply Company Inc 70-G East Jefryn Boulevard Deer Park, New York, 11729 USA Telephone: 631-586-4309 Fax: 631-254-5591 E-Mail:
Bayville Chemical Supply Company Inc70-G East Jefryn BoulevardDeer Park, New York, 11729  USA           Telephone: 631-586-4309      Fax: 631-254-5591      E-Mail: 


Lanthanum III Oxide Powder



99.99% pure




Synonyms:  Lanthanum Oxide, Lanthanum Trioxide, Lanthanum Sesquioxide, Dilanthanum Oxide


Lanthanum Oxide is a rare earth Chemical powder used to make optical glasses. With the addition of other oxides, such as tungsten oxide, tantalum oxide and thorium oxide, La2O3 improves the resistance of the glass to attack by alkali. Lanthanum oxide is also used for imaging screen phosphors, conductive ceramics, capacitors, piezoelectric and thermoelectric materials and is also used in some exhaust systems of automobiles.



Formula                    La2O3

CAS Number            1312-81-8

Molecular Weight     325.82

Color                        White to yellow-white

Odor                         Odorless

Crystal Structure      Hexagonal

Density (at 15oC)     6.51 gm/cm3

Density (at 25oC)     5.87 gm/cm3

Melting Point            2315oC

Boiling Point             4200oC

pH                            Alkaline (about 9.0)

Solubility in Water    Insoluble

Band Gap                 4.3 eV

Assay                       99.99% pure minimum

Particle Size             5 – 10 microns


Lanthanum is very hydroscopic and over time absorbs moisture and converts to lanthanum hydroxide.

Lanthanum is non-hazardous for shipping, non-flammable for shipping and storage. No shipping restrictions for air, sea or ground transportation.

SDS available upon request.


Where to Find Us:

Bayville Chemical
70 East Jefryn Boulevard
Suite G
Deer Park, NY 11729

Phone: 631 586-4309

What's New

New larger location

As of August 2014, we have moved to this new, larger, modern facility to better service your needs.


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