CAS 7440-19-9 Samarium - Catalysts / Alfa Chemistry

Synonyms

Samarium rod, 12.7mm (0.5in) dia; Samarium ingot, 3N; Samarium pieces, 12mm (0.47in) & down; Samarium powder; EINECS 231-128-7; AKOS024438061; Samarium foil, 1.0mm (0.04in) thick; Samarium hydride, 99.9%, - 325 mesh SmH2 -3, Hydrogen level may vary; samarium atom; TRA0016065;

IUPAC Name

samarium;

Molecular Weight

150.36g/mol

Molecular Formula

Sm;

Canonical SMILES

[Sm];

InChI

InChI=1S/Sm;

InChI Key

KZUNJOHGWZRPMI-UHFFFAOYSA-N;

Melting Point

1072 deg C;

Density

7.52 g cu cm at 25 deg C;

Storage

water-free area

Color Form

Silvery metal; rhombohedral;

Covalently-Bonded Unit Count

EC Number

231-128-7

Exact Mass

151.92g/mol

Heavy Atom Count

Monoisotopic Mass

151.92g/mol

Other Experimental

Samarium has high thermal neutron capture cross section ... has a low rate of burn off when used in control rods or in ceramics for radiation protection;Reasonably stable in air;Three crystal modifications of the metal exit, eith transformations at 734 and 922 deg C;Ignites in air at 150 deg C;Specific heat capacity at 298 K, J-mol/K: 29.6; linear coefficient of expansion, 10-6/K: 10.4; thermal conductivity W/cm/K: 0.133; Vickers hardness: 45; Modulus of elasticity, 10+10 N/sq m: 5.75; Shear modulus, 10+10 N/sq m:1.26;Poisson's ratio: 0.352; Grueneisen constant for temperature dependence of electrical resistivity: 0.63; Electrical resistivity, microohlm/cm: 94; Electrion emission, eV: 2.7-2.8; crystal structure of stable phase at room temperature; Lattice constants, nm: 0.3621 (a); 2.625 (c); Distillation rate: 83 g-sq cm/hr at 1.3X10-3 bar;33 isotopes and isomers of samarium ... natural samarium is a mixture of seven isotopes, three of which are unstable but have long half-lives;Samarium-147 and -148 are naturally occurring and stable. Samarium-129 through -143 and samarium-155 through -162 are artificially produced and are radioactive.;

Topological Polar Surface Area

0A^2

UNII

42OD65L39F

Vapor Pressure

1.3X10-5 bar at 722 mm Hg; 1.3X10-3 bar at 964 mm Hg;

Application

Samarium, a silvery grey powder known for its reactive nature, serves multiple purposes across a range of industries. Notably, it finds significant application in making samarium-cobalt magnets due to its ability to retain magnetisation at high temperatures, making it an excellent choice for permanent magnets in computer hard disks. The radioactive isotope samarium-153 is crucial in cancer treatment drugs, specifically addressing lung, prostate, and breast cancers, as well as osteosarcoma. Additionally, samarium-149 plays a vital role as a neutron absorber in nuclear reactors. Beyond its uses in magnetics and medicine, samarium acts as a catalyst in various chemical reactions, such as the dehydrogenation of ethanol, and is included in glass manufacturing for its special infrared-absorbing properties. While samarium itself is not biologically active and poses certain health risks upon exposure, its versatile applications extend to the production of laser crystals and enhancements in metallurgical research, contributing valuable advancements across scientific and industrial fields.

December 25, 2024

Effective Catalyst for Synthetic Applications

I've used Samarium from Alfa Chemistry in my recent organic synthesis research. The silvery-grey powder proved effective as a catalyst, especially in reductive coupling reactions. Highly recommended for researchers exploring innovative synthetic methodologies.