ChemicalBook >  Product Catalog >  Inorganic chemistry >  Inorganic salts >  Silicide and silicates >  MAGNESIUM SILICIDE

MAGNESIUM SILICIDE

Basic information Safety Related Supplier

MAGNESIUM SILICIDE Basic information

Product Name:
MAGNESIUM SILICIDE
CAS:
22831-39-6
MF:
Mg2Si
MW:
76.7
EINECS:
245-254-5
Mol File:
22831-39-6.mol
More
Less

MAGNESIUM SILICIDE Chemical Properties

Melting point:
1102 °C
Density 
1,94 g/cm3
form 
Powder
color 
Blue
Specific Gravity
2.
Water Solubility 
Insoluble in water and denser than water.
Sensitive 
Air & Moisture Sensitive
Merck 
14,5688
Stability:
Spontaneously flammable - mixtures with air are explosive. Reacts with water to form toxic vapours.
EPA Substance Registry System
Magnesium silicide (Mg2Si) (22831-39-6)
More
Less

Safety Information

Hazard Codes 
F
Risk Statements 
14-14/15
Safety Statements 
7/8-43
RIDADR 
UN 2624 4.3/PG 2
WGK Germany 
3
TSCA 
Yes
HazardClass 
4.3
PackingGroup 
II

MSDS

More
Less

MAGNESIUM SILICIDE Usage And Synthesis

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.

Chemical Properties

blue crystals

Chemical Properties

Magnesium silicide is a slate blue crystalline solid.

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.

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

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

More
Less

MAGNESIUM SILICIDESupplierMore

J & K SCIENTIFIC LTD.
Tel:
010-82848833- ;010-82848833-
Email:
jkinfo@jkchemical.com;market6@jkchemical.com
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel:
21-61259100-
Email:
sh@meryer.com
Alfa Aesar
Tel:
400-610-6006; 021-67582000
Email:
saleschina@alfa-asia.com
Energy Chemical
Tel:
021-58432009 / 400-005-6266
Email:
info@energy-chemical.com
Adamas Reagent, Ltd.
Tel:
400-600-9262
Email:
bxy@titansci.com
Basic information Safety Related Supplier