| Identification | Back Directory | [Name]
MAGNESIUM SILICIDE | [CAS]
22831-39-6 | [Synonyms]
MAGNESIUM SILICIDE
dimagnesium silicide
magnesiumsilicide(mg2si)
MAGNESIUM SILICIDE -45 MY
Silanediylidenedimagnesium
MagnesiuM silicide, 99.99％
Magnesium silicide, powder
MagnesiumsilicideCmeshgraypowder
Magnesiumsilicide,99.5%(metalsbasis)
MAGNESIUM SILICIDE: 99.5%, -840 MICRON
Magnesium silicide (99.5% Mg) (C < 1%)
Magnesium silicide, 99.99% (metals basis)
Magnesium silicide, 99.5% trace metals basis
Magnesium silicide, 99.99% trace metals basis
Nickel sulfide, #150 mesh, 99.7% metals basis
Magnesium silicide pieces, 99.7% trace metals basis
MagnesiuM silicide >=99% trace Metals basis, -20 Mesh | [EINECS(EC#)]
245-254-5 | [Molecular Formula]
Mg2Si | [MDL Number]
MFCD00016202 | [MOL File]
22831-39-6.mol | [Molecular Weight]
76.7 |
| Chemical Properties | Back Directory | [Appearance]
Magnesium silicide is a slate blue crystalline
solid. | [Melting point ]
1102 °C | [density ]
1,94 g/cm3 | [solubility ]
reacts with H2O | [form ]
Powder | [color ]
Blue | [Specific Gravity]
2. | [Stability:]
Spontaneously flammable-mixtures with air are explosive. Reacts with water to form toxic vapours. | [Water Solubility ]
Insoluble in water and denser than water. | [Crystal Structure]
Cubic, Antifluorite Structure - Space Group Fm3m | [Hydrolytic Sensitivity]
7: reacts slowly with moisture/water | [Sensitive ]
Air & Moisture Sensitive | [Merck ]
14,5688 | [EPA Substance Registry System]
Magnesium silicide (Mg2Si) (22831-39-6) |
| Hazard Information | Back Directory | [Chemical Properties]
blue crystals | [Uses]
In semiconductor research. Has been used to build Mg-Si rectifiers. | [General Description]
A colorless crystalline solid. Insoluble in water and denser than water. Contact may irritate skin, eyes and mucous membranes. May be toxic by ingestion. | [Air & Water Reactions]
Contact with moisture under acidic condition generates silanes that ignite in air. Insoluble in water. | [Reactivity Profile]
MAGNESIUM SILICIDE is a reducing agent. May react vigorously with oxidizing materials. | [Health Hazard]
Inhalation or contact with vapors, substance or decomposition products may cause severe injury or death. May produce corrosive solutions on contact with water. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control may cause pollution. | [Fire Hazard]
Produce flammable gases on contact with water. May ignite on contact with water or moist air. Some react vigorously or explosively on contact with water. May be ignited by heat, sparks or flames. May re-ignite after fire is extinguished. Some are transported in highly flammable liquids. Runoff may create fire or explosion hazard. | [Potential Exposure]
Magnesium silicide is used in the
semiconductor industry and to produce certain aluminum
alloys | [First aid]
f this chemical gets into the eyes, remove any
contact lenses at once and irrigate immediately for at least
15 minutes, occasionally lifting upper and lower lids. Seek
medical attention immediately. If this chemical contacts
the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from
exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has
stopped and CPR if heart action has stopped. Transfer
promptly to a medical facility. When this chemical
has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an
unconscious person vomit | [Shipping]
UN2624 Magnesium silicide, Hazard Class: 4.3;
Labels: 4.3-Dangerous when wet materia | [Incompatibilities]
Possibly pyrophoric, especially in moist
air. Pyrophoric; mixtures with air are spontaneously explosive. A strong reducing agent. Incompatible with oxidizers
(chlorates, nitrates, peroxides, permanganates, perchlorates,
chlorine, bromine, fluorine, etc.); contact may cause fires
or explosions. Keep away from alkaline materials, mineral
acids, strong acids, strong bases. Reacts with water; releasing explosive hydrogen gas and may also release selfigniting toxic silane gas | [Description]
Magnesium silicide has the molecular formula of
Mg2Si and the molecular weight of 76.6955 g/mol. Its density is 1.998 g/cc
and its melting point is 1102°C. It is a black powder.
Mg2Si crystallizes in a cubic CaF2 (fluorspar)-type
lattice with a = 4.49 ? . The centers of this lattice are analogous
to that of diamond. Each Si atom forms four covalent
sp3 bonds. The Mg subshells are only half-filled.
There is no bonding between the two Mg atom sites.
The distance between the Mg and Si atoms is 2.77 ? .
Bonding in this compound is essentially covalent.
| [Physical properties]
Magnesium silicide is unstable in air and reacts with
moisture to form silane. When magnesium silicide is
placed into aqueous HCl, the gas silane, SiH4, is
produced. This gas is the silicon analogue of methane,
CH4, but is more reactive. Silane is pyrophoric, that is
due to the presence of O2 in the air, i.e. it spontaneously
combusts in air.
These reactions are typical of a Group-2 silicide.
Mg2Si reacts similarly with sulfuric acid.
As a powder, magnesium silicide is dark blue or
slightly purple in color. | [storage]
Flammable solid. Color Code—Red: FlammabilityHazard: Store in a flammable materials storage area. Priorto working with this chemical you should be trained on itsproper handling and storage. Store in tightly closed containers in a cool, well-ventilated area away from acids. Keepdry at all times. Sources of ignition, such as smoking andopen flames, are prohibited where magnesium silicide ishandled, used, or stored. | [Structure and conformation]
The space lattice of Mg2Si belongs to the cubic system, and it has an antifluorite type structure
(refer to Mg2Ge) with a lattice constant of a=0.634 nm. |
|
| Company Name: |
Alfa Aesar
|
| Tel: |
400-6106006 |
| Website: |
http://chemicals.thermofisher.cn |
| Company Name: |
Energy Chemical
|
| Tel: |
021-021-58432009 400-005-6266 |
| Website: |
http://www.energy-chemical.com |
| Company Name: |
Sigma-Aldrich
|
| Tel: |
021-61415566 800-8193336 |
| Website: |
https://www.sigmaaldrich.cn |
|