| Identification | More | [Name]
EUROPIUM | [CAS]
7440-53-1 | [Synonyms]
EUROPIUM
EUROPIUM, AAS STANDARD SOLUTION
EUROPIUM ATOMIC ABSORPTION STANDARD
EUROPIUM ICP/DCP STANDARD
EUROPIUM ICP STANDARD
EUROPIUM METAL
EUROPIUM PLASMA EMISSION SPECTROSCOPY STANDARD
EUROPIUM PLASMA EMISSION STANDARD
EUROPIUM, PLASMA STANDARD SOLUTION
EUROPIUM SINGLE ELEMENT STANDARD
EUROPIUM STANDARD
Eu
Europium atomic absorption standard solution
Europium ingot
EuropiumingotNREOpackedinmineraloil
EUROPIUM, CHIP, 99.9%
EUROPIUM, INGOT, 99.9%
EUROPIUM, DISTILLED, 99.9%
EUROPIUM FOIL, 99.9% (REO)
EUROPIUM INGOT, 99.99%(REO) | [EINECS(EC#)]
231-161-7 | [Molecular Formula]
Eu | [MDL Number]
MFCD00010992 | [Molecular Weight]
151.96 | [MOL File]
7440-53-1.mol |
| Chemical Properties | Back Directory | [Definition]
Atomic number 63, one of the lanthanide or rare-earth elements of the cerium subgroup, aw 151.96, valences of 2, 3; two stable isotopes. | [Appearance]
grey ingots | [Melting point ]
822 °C (lit.) | [Boiling point ]
1527 °C (lit.) | [density ]
5.24 g/mL at 25 °C(lit.)
| [solubility ]
reacts with H2O | [form ]
ingot
| [color ]
Silver/gray | [Specific Gravity]
5.24 | [Resistivity]
81 μΩ-cm, 20°C | [Water Solubility ]
Reacts with water. | [Sensitive ]
Air & Moisture Sensitive | [Merck ]
13,3937 | [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) | [InChI]
InChI=1S/Eu | [InChIKey]
OGPBJKLSAFTDLK-UHFFFAOYSA-N | [History]
In 1890 Boisbaudran obtained basic fractions from samarium-gadolinium concentrates that had spark spectral lines not accounted for by samarium or gadolinium. These lines subsequently have been shown to belong to europium. The discovery of Europium is generally credited to Demarcay, who separated the rare earth in reasonably pure form in 1901. The pure metal was not isolated until recent years. Europium is now prepared by mixing Eu2O3 with a 10% excess of lanthanum metal and heating the mixture in a tantalum crucible under high vacuum. The element is collected as a silvery-white metallic deposit on the walls of the crucible. As with other rare-earth metals, except for lanthanum, europium ignites in air at about 150 to 180°C. Europium is about as hard as lead and is quite ductile. It is the most reactive of the rare-earth metals, quickly oxidizing in air. It resembles calcium in its reaction with water. Bastnasite and monazite are the principal ores containing europium. Europium has been identified spectroscopically in the sun and certain stars. Europium isotopes are good neutron absorbers and are being studied for use in nuclear control applications. Europium oxide is now widely used as a phosphor activator and europium-activated yttrium vanadate is in commercial use as the red phosphor in color TV tubes. Europiumdoped plastic has been used as a laser material. With the development of ion-exchange techniques and special processes, the cost of the metal has been greatly reduced in recent years. Natural europium contains two stable isotopes. Thirty-five other radioactive isotopes and isomers are known. Europium is one of the rarest and most costly of the rare-earth metals. It is priced at about $60/g (99.9% pure). | [SMILES]
[Eu] | [Uses]
Neutron absorber in nuclear control, color-TV phosphors to activate yttrium, phosphors in postagestamp glues to permit electronic recognition of firstclass mail. | [CAS DataBase Reference]
7440-53-1(CAS DataBase Reference) | [EPA Substance Registry System]
Europium (7440-53-1) |
| Safety Data | Back Directory | [Hazard Codes ]
F,C | [Risk Statements ]
R14/15:Reacts violently with water, liberating extremely flammable gases .
R17:Spontaneously flammable in air.
R34:Causes burns. | [Safety Statements ]
S43:In case of fire, use ... (indicate in the space the precise type of fire-fighting equipment. If water increases the risk add-Never use water) .
S7/8:Keep container tightly closed and dry .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S27:Take off immediately all contaminated clothing .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S23:Do not breathe gas/fumes/vapor/spray (appropriate wording to be specified by the manufacturer) . | [RIDADR ]
UN 2813 4.3/PG 2
| [WGK Germany ]
3
| [F ]
1-10 | [TSCA ]
Yes | [HazardClass ]
4.1 | [PackingGroup ]
II | [HS Code ]
28053090 |
| Hazard Information | Back Directory | [Hazard]
Highly reactive, may ignite spontaneously in powder form. | [Chemical Properties]
grey ingots | [Physical properties]
Europium is one of the most rare of the rare-earths. Its abundance on Earth is only 1.1ppm. It is a soft, shiny, steel-gray metal that is quite ductile and malleable, which means it canbe worked and formed into many shapes. It looks like and feels like the element lead (Pb), butis somewhat heavier. It is the most chemically active of all the rare-earths.
Europium’s melting point is 822°C, its boiling point is 1,529°C, and its density is 5.243g/cm3. | [Isotopes]
There are a total of 45 isotopes of europium. Two are considered stable andaccount for 100% of the europium found on Earth: Eu-151 (47.81%) and Eu-153(52.19%). All the other 53 isotopes are radioactive and artificially produced, primarily through electron capture. | [Origin of Name]
Named for the continent of Europe. | [Occurrence]
Europium is the 13th most abundant of all the rare-earths and the 55th most abundantelement on Earth. More europium exists on Earth than all the gold and silver deposits. Likemany other rare-earths, europium is found in deposits of monazite, bastnasite, cerite, andallanite ores located in the river sands of India and Brazil and in the beach sand of Florida.It has proven difficult to separate europium from other rare-earths. Today, the ion-exchange process is used to extract europium from the other rare-earths found in monazite sand(ore). | [Characteristics]
Pure europium will slowly oxidize in air at room temperature and will produce hydrogenwhen placed in water. It will ignite spontaneously if the air temperature is over 150°C. Insome ways europium resembles the elements calcium, strontium, and barium found in group2 of the periodic table. |
| Questions And Answer | Back Directory | [Uses]
Europium, named after the continent of Europe, is mainly used for its phosphorescence. Excitation of the Europium atom by absorption of ultra violet radiation can result in specific energy level transitions within the atom creating an emission of visible radiation.
It is a dopant in some types of glass in lasers and other optoelectronic devices. Europium Oxide (Eu2O3) is widely used as a red phosphor in television sets and fluorescent lamps, and as an activator for Yttrium-based phosphors.
In energy efficient fluorescent lighting, Europium provides not only the necessary red, but also the blue. Several commercial blue phosphors are based on Europium for color TV, computer screens and fluorescent lamps.
Its luminescence is also valuable in medical, surgical and biochemical applications.
Europium is used for the capture of thermal neutrons for nuclear control rods in atomic power stations. Thermal neutron absorption of the natural mixture of europium isotopes is 4,600 barns. While its salts are used in coatings for cathode ray tubes in color televisions, organoderivatives are used in NMR spectroscopy.
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