13112

Magnesium

powder, ≥99%

• Synonym(s): Magnesium element
• Empirical Formula (Hill Notation): Mg
• CAS Number: 7439-95-4
• Molecular Weight: 24.31
• Beilstein/REAXYS Number: 4948473
• EC Number: 231-104-6
• MDL number: MFCD00085308
• UNSPSC Code: 12141502
• eCl@ss: 38110201
• PubChem Substance ID: 57647054
• NACRES: NA.22

Properties

• vapor pressure: 1 mmHg ( 621 °C)
• assay: ≥99%
• form: powder
• autoignition temp.: 950 °F
• reaction suitability: reagent type: reductant
• resistivity: 4.46 μΩ-cm, 20°C
• impurities: ≤0.05% insoluble in HCl
• bp: 1090 °C (lit.)
• mp: 648 °C (lit.)
• density: 1.74 g/mL at 25 °C (lit.)
• cation traces: Fe: ≤500 mg/kg
• SMILES string: [Mg]
• InChI: 1S/Mg
• InChI key: FYYHWMGAXLPEAU-UHFFFAOYSA-N

Description

Application

Magnesium (powder) can be used as a reducing agent to synthesize:

• Titanium alloy hydride powder by the reduction of upgraded titania slag (UGS) under hydrogen atmosphere.      
• Ultrafine metallic iron (bcc-Fe) powders from hematite (α-Fe₂O₃) by ball-milling process.

It can also be used as a reducing agent in ruthenium(III) complex catalyzed atom-transfer radical addition (ATRA) and cyclization (ATRC) reactions. Magnesium does not generate free radicals but it generates and regenerates the catalytically active ruthenium(II) species.

Analysis Note

appearance : silver-gray

Safety Information

• pictograms: GHS02
• signalword: Danger
• hcodes: H228,H251,H261
• pcodes: P210 - P223 - P231 + P232 - P235 - P240 - P403 + P235
• Hazard Classifications: Flam. Sol. 1 - Self-heat. 1 - Water-react 2
• Storage Class: 4.2 - Pyrophoric and self-heating hazardous materials
• wgk_germany: nwg
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges