Silicon disulfide

  • Silicon sulfide (SiS2)
Formula
SiS2
Structure
Description
White chunks with the odor of rotten eggs.

Registry Numbers and Inventories.
CAS
13759-10-9
EC (EINECS/ELINCS)
237-344-8
R: 25 31 36/37/38
S: 8 20 26 36/37 45 60
UN (DOT)
3134
Merck
12,8638
Canada DSL/NDSL
NDSL
US TSCA
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
S2Si
Formula mass
92.22
Melting point, °C
1090
Density
2.02 g/cm3 (20 C)

Hazards and Protection.
Storage
Protect from humidity and water. Store under dry inert gas. Keep container tightly sealed. Store in cool, dry conditions in well sealed containers.
Protection
Protective work clothing. Chemical protective gloves. Safety glasses or goggles.
Stability
Decomposition will not occur if used and stored according to specifications.
Incompatibilities
Acids, oxidizing agents, water/moisture.

Fire.
Fire fighting
Extinguish with CO2, sand, extinguishing powder. Do not use water. Wear self-contained respirator. Wear fully protective impervious suit.
Combustion products
Hydrogen sulfide, sulfur oxides, silicon oxide.
Health
2
 
Flammability
2
 
 
Reactivity
3
 

Health.
Exposure effects
Inorganic silicon compounds may be acute inhalation irritants. Prolonged inhalation may cause pulmonary fibrosis known as silicosis. Sulfides show variable toxicity. The alkaline sulfides are similar in action to alkalies. They cause irritation of the skin and are corrosive by ingestion. The heavy metal sulfides are generally insoluble and show little toxic action except through the liberation of hydrogen sulfide. Hydrogen sulfide, if generated, is toxic, a severe irritant and flammable. Effects include conjunctivitis, headache, nausea, dizziness, coughing, pulmonary edema and possibly death.

First aid
 
   Ingestion
Seek immediate medical treatment.
   Inhalation
Supply fresh air. If required, provide artificial respiration. Keep patient warm. Seek immediate medical advice.
   Skin
Immediately wash with water and soap and rinse thoroughly. Seek immediate medical advice.
   Eyes
Rinse opened eye for several minutes under running water. Then consult a doctor.

Transport.
UN number
3134
Response guide
Hazard class
4.3
Packing Group
II