Magnesium silicide
Basic information
- CAS
22831-39-6- Standard SMILES
[Mg]=[Si]=[Mg]- InChIKey
YTHCQFKNFVSQBC-UHFFFAOYSA-N- Molecular formula
- Mg2Si
- Average molar mass
- 76.7 g/mol
- Monoisotopic mass
- 75.9470099
Overview
Magnesium silicide appears as a colorless crystalline solid. Insoluble in water and denser than water. Contact may irritate skin, eyes and mucous membranes. May be toxic by ingestion.
Names & identifiers
- Preferred name
- Magnesium silicide
- English name
- MAGNESIUM SILICIDE
- Molecular formula
- Mg2Si
- Molecular weight
- 76.7
Names & synonyms
Magnesium silicideDimagnesium silicideMagnesium silicide (Mg2Si)Dimagnesium monosilicideUNII-475E6FMG3KUN2624EINECS 245-254-5475E6FMG3K39404-03-0DTXSID4066830RefChem:155265MAGNESIUM SILICIDE [MI]
Show more names
PubChem ID: 89858magnesiumsilicide(mg2si)Magnesium silicide MgSi2MAGNESIUM SILICIDE -45 MYMagnesium silicide, 99.5%SilanediylidenedimagnesiumMagnesiuM silicide, 99.99％
DTXCID5036761DTXSID4010825622831-39-6MagnesiumsilicidMagnesium silicide, powder, 99.5%Magnesium silicide, powderMagnesium silicide [UN2624] [Dangerous when wet]SCHEMBL453132
Database identifiers
- CAS
22831-39-6、39404-03-0- PubChem CID
- 89858
- DTXSID
DTXSID4066830- EC Number
- 245-254-5
- Nikkaji
- J95.815H
Properties
Computed structural properties
- Topological polar surface area
- 0 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 0
- Rotatable bonds
- 0
- Heavy atoms
- 3
- Formal charge
- 0
- Complexity
- 18.3
Experimental & physicochemical properties
Chemical ClassesMetals -> Metals, Inorganic Compounds
SpringerMaterials Propertiesdielectric constant
Physical Description
Magnesium silicide appears as a colorless crystalline solid. Insoluble in water and denser than water. Contact may irritate skin, eyes and mucous membranes. May be toxic by ingestion.
Other Solid
Slate-blue solid; [Merck Index] Colorless solid; [CAMEO] Blue pieces; [Alfa Aesar MSDS]
Physicochemical properties
- Melting point
- 1102 °C · 1102 °C
- Density
- 1 · 1,94 g/cm3
- solubility
- 2 O · reacts with H2O
- form
- Powder
- Specific Gravity
- 2 · 2.
- color
- Blue
- Water Solubility
- Insoluble in water and denser than water.
- Thermal Conductivity
- 7.908 W/ · 7.908 W/(m·K)
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
GHS classification
GHS Classification
Danger
H261 (100%): In contact with water releases flammable gas [Danger Substances and mixtures which in contact with water, emit flammable gases]
P231+P232, P280, P370+P378, P402+P404, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 213 reports by companies from 2 notifications to the ECHA C&L Inventory.
Hazard information
Regulatory Information
Magnesium silicide (Mg2Si) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Magnesium silicide (Mg2Si) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)
DOT LabelDangerous When Wet
Fire Hazards
Excerpt from ERG Guide 138 [Substances - Water-Reactive (Emitting Flammable Gases)]:
· Produce flammable gases on contact with water.
Health Hazards
Excerpt from ERG Guide 138 [Substances - Water-Reactive (Emitting Flammable Gases)]:
· Inhalation or contact with vapors, substance or decomposition products may cause severe injury or death.
Hazards SummaryDecomposed by water; Hazardous when wet; [Merck Index] A strong reducing agent that reacts with water; [CAMEO] Reacts with water evolving extremely flammable gases; May cause irritation; [Alfa Aesar MSDS] See Calcium silicide.
DOT ID and Guide2624 138
Chemistry & industry
Uses & manufacturing
UsesUsed in semiconductor research; [Merck Index]
U.S. Production2023: 368,400 lb
Consumer UsesAlloys
Industry UsesAlloys
General Manufacturing Information
Electrical Equipment, Appliance, and Component Manufacturing
Magnesium silicide (Mg2Si): ACTIVE
Applications
DescriptionMagnesium 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.
UsesMagnesium silicide is used to produce alloys such as aluminum alloys. It is also used in food, beverages, as a flavor enhancer and as an intermediate in chemical research.
UsesMagnesium silicide (Mg2Si) can be used as a thermoelectric material for the fabrication of thermoelectric (TE) devices. It can also be used as a counter electrode for lithium-ion batteries. It can generally be synthesized as a nanoparticle that can be utilized as a deoxygenation agent.
UsesIn semiconductor research. Has been used to build Mg-Si rectifiers.
General DescriptionA colorless crystalline solid. Insoluble in water and denser than water. Contact may irritate skin, eyes and mucous membranes. May be toxic by ingestion.
Related reactions
0 records
No reaction records under the current filter.
Compound notes
Loading…