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
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 |
| InChI | 1S/Ca.Si2/c;1-2/q+2;-2 |
| InChIKey | ATJCUTDHOFKCKB-UHFFFAOYSA-N |
| SMILES | [Ca++].[Si-]#[Si-] |
| 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 |
| PPE | Eyeshields, Gloves, type P3 (EN 143) respirator cartridges |
| Hazard Codes | F |
| Risk Statements | 15 |
| Safety Statements | 8-43 |
| RIDADR | UN 1405 4.3/PG 2 |
| WGK Germany | 3 |
| TSCA | TSCA listed |
| HazardClass | 4.3 |
| PackingGroup | II |
| Storage Class | 4.3 - Hazardous materials which set free flammable gases upon contact with water |
| Hazard Classifications | Water-react 2 |
