LANTHANUM OXIDE

PRODUCT IDENTIFICATION
CAS NO. 1312-81-8

LANTHANUM OXIDE 

EINECS NO. 215-200-5
FORMULA La2O3
MOL WT. 325.82

H.S.CODE

  
TOXICITY Oral rat LD50: 10 g/kg
SYNONYMS lanthana; lanthanum sesquioxide; lanthanum trioxide;
PRICE U$80/kg (100kgs)

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE white powder
MELTING POINT > 2300 C
BOILING POINT > 4200 C
SPECIFIC GRAVITY  
SOLUBILITY IN WATER Insoluble (soluble in acid)
pH

 

FLASH POINT  
NFPA RATINGS Health: 1; Flammability: 0; Reactivity: 0
STABILITY Stable under ordinary conditions. Highly hygroscopic.

GENERAL DESCRIPTION & APPLICATIONS
Lanthanum is a malleable, ductile, soft, silvery white metallic element belonging to group number 3 of periodic table; atomic number 57; atomic mass 138.91; melting point 920°C; boiling point 3464°C; specific gravity 6.162 g/cm3; Oxidation state 3; electronic configuration [Xe] 5d1 6s2. It oxidizes rapidly when exposed to moisture air. Lanthanum is the second most abundant rare-earth element next to cerium. Lanthanide (or lanthanoid) series are the group of rare-earth elements from lanthanum (atomic numbers 57) to 71; their chemical properties are similar to each other. The chemical properties of scandium and yttrium are also similar to the lanthanides; these group are often referred to "rare earth elements".

Atomic No.

Element

Symbol

CAS RN
21 Scandium

Sc

7440-20-2
39 Yttrium

Y

7440-65-5
57 Lanthanum La7439-91-0
58 Cerium Ce7440-45-1
59 Praseodymium Pr7440-10-0
60 Neodymium Nd7440-00-8
61 Promethium Pm7440-12-2
62 Samarium Sm7440-19-9
63 Europium Eu7440-53-1
64 Gadolinium Gd7440-54-2
65 Terbium Tb7440-27-9
66 Dysprosium Dy7429-91-6
67 Holmium Ho7440-60-0
68 Erbium Er7440-52-0
69 Thulium Tm7440-30-4
70 Ytterbium Yb7440-64-4
71 7440-64-4 Lu7440-64-4

Lanthanum belongs to the group of transition metal whose atom has an incomplete d sub-shell, or which can give rise to cations with an incomplete d sub-shell; includes elements 21 through 29 (scandium through copper), 39 through 47 (yttrium through silver), 57 through 79 (lanthanum through gold), and all elements from 89 (actinium). Minerals which incorporates lanthanum include lanthanite, cordylite, parisite, bastnaesite, synchysite, and monazite. Lanthanum is a major component of misch metal, a pyrophoric alloy used in lighter flints. Small amounts of lanthanum added to steel or iron to improves ductility and to produce nodular cast iron. Rare-earth compounds containing lanthanum are used in carbon lighting applications. Lanthanum is used to replace lime in calcium lights and in optical glass for the alkali resistance, the high refractive index and low dispersion applications. Lanthanum-rich lanthanide compounds are used in cracking reactions as a FCC catalyst. Lanthanum nitrate is a hygroscopic white crystals; melting point 40 C. It is soluble in water and alcohol. It is used as an antiseptic and a catalyst. It is used in gas mantles, specialty glass and water treatment. Lanthanum oxide, also called lanthana; lanthanum sesquioxide; lanthanum trioxide, is a white powder melting point 2000 C. It is insoluble in water but soluble in acids. Lanthanum Oxide is used in manufacturing high transparency and refraction index glass. The end application is precision optics like microscope and telescope lenses and camera components. It is used in preparing special glasses. Lanthanum sulfate is a white crystals. It is slightly soluble in water, soluble in alcohol. It is used for atomic weight determinations for lanthanum. Lanthanum carbonate is a hygroscopic powder soluble in water and acids. It is a component of the catalyst used in cracking reactions. In medicinal use, lanthanum carbonate is used in the treatment of hyperphosphataemia in patients with end stage renal disease. Examples of lanthanum salts include:

  • Lanthanum acetate La(O2C2H3)3 (CAS RN: 917-70-4)
  • Lanthanum boride (LaB6) (CAS RN: 12008-21-8)
  • Lanthanum bromide (LaBr3) (CAS RN: 13536-79-3)
  • Lanthanum carbide (LaC2) (CAS RN: 12071-15-7)
  • Lanthanum carbonate La2(CO3)3 (CAS RN: 587-26-8)
  • Lanthanum chloride LaCl3 (CAS RN: 10099-58-8)
  • Lanthanum edetate (CAS RN: 11138-87-7)
  • Lanthanum fluoride LaF3 (CAS RN: 13709-38-1)
  • Lanthanum hydride (LaH3) (CAS RN: 13864-01-2)
  • Lanthanum hydroxide (La(OH)3) (CAS RN: 14507-19-8)
  • Lanthanum iodide (LaI3) (CAS RN: 13813-22-4)
  • Lanthanum nitrate La(NO3)3 (CAS RN: 35099-99-1)
  • Lanthanum nitride (LaN) (CAS RN: 25764-10-7)
  • Lanthanum oxalate La2(C2O4)3 (CAS RN: 537-03-1)
  • Lanthanum oxide La2O3 (CAS RN: 1312-81-8)
  • Lanthanum oxide sulfide (La2O2S) (CAS RN: 12031-43-5)
  • Lanthanum oxybromide (CAS RN: 13875-40-6)
  • Lanthanum silicide (LaSi2) (CAS RN: 12056-90-5)
  • Lanthanum sulfate La2(SO4)3 (CAS RN: 10099-60-2)
  • Lanthanum sulfide (La2S3) (CAS RN: 12031-49-1)
  • Lanthanum titanium oxide (La2Ti2O7) (CAS RN: 12031-47-9)
  • Lanthanum tribromate (CAS RN: 28958-23-8)
  • Lanthanum(III) phosphate (CAS RN: 14913-14-5)
  • Chromium lanthanum oxide (CrLaO3) (CAS RN: 12017-94-6)
SALES SPECIFICATION

APPEARANCE

white powder

RE PURITY

99.9% min (or upon request)

RE IMPURITY

TREO: 99.0% min

CeO2 : 20ppm max

Pr6O11 : 20ppm max

Nd2O3 : 10ppm max

Sm2O3 : 10ppm max

Y2O3 : 10ppm max

Non-RE IMPURITY

 Fe2O3 : 10ppm max

SiO2 : 40ppmmmax

CaO : 30ppm max

CuO : 5ppm max

PbO : 5ppm max

NiO : 4ppm max

Cl- : 300ppm max

TRANSPORTATION
PACKING  
HAZARD CLASS Not regulated
UN NO.  
PRICE INFORMATION

Click to open the table

 

Click to close the table