Lanthanum , 99.9%metalsbasis , 7439-91-0
Synonym(s):
;Lanthanum
CAS NO.：7439-91-0
Empirical Formula: La
Molecular Weight: 138.91
MDL number: MFCD00011066
EINECS: 231-099-0
PRODUCT Properties
| Melting point: | 920 °C (lit.) |
| Boiling point: | 3464 °C (lit.) |
| Density | 6.19 g/mL at 25 °C (lit.) |
| solubility | soluble in dilute acid solutions |
| color | Silver-white |
| Specific Gravity | 6.19 |
| Resistivity | 54 μΩ-cm |
| Water Solubility | slowly decomposes in H2O; readily attacked by mineral acids [MER06] |
| Sensitive | Air & Moisture Sensitive |
| Merck | 13,5379 |
| Exposure limits | ACGIH: TWA 2 ppm; STEL 4 ppm OSHA: TWA 2 ppm(5 mg/m3) NIOSH: IDLH 25 ppm; TWA 2 ppm(5 mg/m3); STEL 4 ppm(10 mg/m3) |
| Stability: | Stable. |
| CAS DataBase Reference | 7439-91-0(CAS DataBase Reference) |
| EPA Substance Registry System | Lanthanum (7439-91-0) |
Description and Uses
Lanthanum is the first element in the rare earth or Lanthanide series. It is the model for all the other trivalent rare earths. After Cerium, it is the second most abundant of the rare earths.
Lanthanum-rich Lanthanide compounds have been used extensively for cracking reactions in FCC catalysts, especially to manufacture high-octane gasoline from heavy crude oil.
Lanthanum-Rich Rare Earth metals play the important roles in hydrogen storage batteries.
It is utilized in green phosphors based on the phosphate (La0.4Ce0.45Tb0.15)PO4;in laser crystals based on the Yttrium-Lanthanum-Fluoride (YLF) composition.
Lanthanum Metal is the very important raw materials in producing Hydrogen Storage Alloys for NiMH batteries, and is also used to produce other pure Rare Earth metals and specialty alloys. Small amounts of Lanthanum added to Steel improves its malleability, resistance to impact, and ductility; Small amounts of Lanthanum are present in many pool products to remove the Phosphates that feed algae. Lanthanum Metal can be further processed to various shapes of ingots, pieces, wires, foils, slabs, rods, discs and powder.
Safety
| Symbol(GHS) |  GHS02 |
| Signal word | Danger |
| Hazard statements | H228 |
| Precautionary statements | P210-P240-P241-P280-P370+P378 |
| Hazard Codes | F,T |
| Risk Statements | 11-34-23/24/25-14/15 |
| Safety Statements | 26-27-36/37/39-45-33-16-23-43-Neverusewater. |
| RIDADR | UN 3264 8/PG 3 |
| WGK Germany | 3 |
| TSCA | Yes |
| HazardClass | 4.1 |
| PackingGroup | III |
| HS Code | 28053014 |
