Chromium silicide

  • Chromium disilicide
Formula
CrSi2
Description
Silver to black, odorless powder.

Registry Numbers and Inventories.
CAS
12018-09-6
EC (EINECS/ELINCS)
234-633-0
Canada DSL/NDSL
NDSL
US TSCA
Listed
Korea ECL
Listed

Properties.
Formula
CrSi2
Formula mass
108.17
Melting point, °C
1470
Density
4.39 g/cm3
Solubility in water
Insoluble

Hazards and Protection.
Storage
Store in tightly closed containers, in a cool dry place.
Protection
Neoprene gloves, protective clothing and safety glasses.
Respirators
Wear a NIOSH-approved dust-mist-fume cartridge respirator.
Small spills/leaks
Wear a self-contained breathing apparatus and full protective clothing. Isolate the area where the spill occurred, insure proper ventilation is available and that water/moisture are kept out of the area. Vacuum up the spill using a high efficiency unit and place in a container for proper disposal. Take care not to raise dust.
Stability
Stable at normal temperatures and pressures.
Incompatibilities
Strong acids and strong bases.
Decomposition
Si, SiOx, Cr, CrOx.

Fire.
Fire fighting
Extinguish using dry chemical, CO2. Wear a self-contained breathing apparatus and full protective clothing to prevent contact with skin and eyes.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OSHA PEL 1 mg/m3 (as Cr)
Exposure effects
The action of crystalline silica on the lungs results in the production of a diffuse, modular fibrosis in which the parenchyma and the lymphatic system are involved. This fibrosis is, to a certain extent, progressive, and may continue to increase for several years after exposure is terminated. When the pulmonary reserve is sufficiently reduced, the worker complains of shortness of breath or exertion. This is first and most common symptom in cases of uncomplicated silicosis.
   Inhalation
May cause sneezing, coughing, difficulty breathing and irritation to the mucous membrane of the respiratory tract.
   Skin
May cause itching irritation, inflammation and dermatitis.
   Eyes
May cause burning sensation, irritation, redness and watering of the eyes if comes in contact.

First aid
 
   Ingestion
Administer 1-2 glasses of milk or water. DO NOT induce vomiting. Seek medical attention.
   Inhalation
Remove victim to fresh air; give oxygen if breathing is difficult. Seek medical attention.
   Skin
Brush material off skin and wash area with soap and water. Seek medical attention.
   Eyes
Flush eyes with lukewarm water for at least 15 minutes and seek medical attention.

Transport.