Home Categories Inorganic chemistry Calcium silicide
F537022

Calcium silicide , Null , 12013-56-8

CAS NO.:12013-56-8

Empirical Formula: CaSi2

Molecular Weight: 96.25

MDL number: MFCD00015977

EINECS: 234-588-7

Update time: 2022-07-08

PRODUCT Properties

Melting point: 1020 °C
Density  2,5 g/cm3
solubility  insoluble in cold H2O; reacts with hotH2O; soluble in acid solutions
form  pieces
Specific Gravity 2.5
color  Gray
Water Solubility  Insoluble in cold water, decomposes in hot water
Sensitive  Moisture Sensitive
Hydrolytic Sensitivity 2: reacts with aqueous acid
CAS DataBase Reference 12013-56-8
EPA Substance Registry System Calcium silicide (CaSi2) (12013-56-8)

Description and Uses

Calcium silicide has the molecular formula of Ca2Si and the molecular weight of 96.2514 g/mol. This salt can be formed by the reaction of Ca metal, mixed with Si, at 850°C in an inert atmosphere.

The uses of calcium silicide are many. Some of these include:
? Calcium silicide is used for manufacture of special metal alloys, e.g. for removing phosphorus and as a deoxidizer.
? In pyrotechnics, it is used as fuel to make special mixtures, e.g. for production of smokes, in flash compositions, and in percussion caps.
? Calcium silicide is used in the manufacture of certain initiatory, pyrotechnic and smoke compositions.
? The silicon and calcium alloy is mainly used as desulfurizing agent and deoxidizer for steel industry and casting industry.
? Calcium silicide has been found to be extremely corrosive to all metals including the refractory metals. It has been successfully contained in boron nitride for 36 h.
? The formation of calcium silicide (CaSi2) intermetallic through the simultaneous reduction of calcium oxide from the electrolyte and of the silica pellet and reduction of dissolved carbon dioxide. C

Safety

Symbol(GHS) 
GHS02
Signal word  Danger
Hazard statements  H261
Precautionary statements  P223-P231+P232-P280-P302+P335+P334-P370+P378-P501
Hazard Codes  F
Risk Statements  15
Safety Statements  8-43
RIDADR  UN 1405 4.3/PG 2
WGK Germany  3
TSCA  Yes
HazardClass  4.3
PackingGroup  II

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