ICSC 1508 - SILICON

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SILICON	ICSC: 1508 (November 2003)

CAS #: 7440-21-3

UN #: 1346

EC Number: 231-130-8

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Combustible under specific conditions. Finely dispersed particles form explosive mixtures in air. Risk of fire and explosion on contact with halogens or oxidizing agents.	NO open flames. Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust. Prevent build-up of electrostatic charges (e.g., by grounding).	Use special powder, dry sand. NO hydrous agents.


	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough.	Use local exhaust or breathing protection.	Fresh air, rest.
Skin	Redness. Roughness.	Protective gloves.	Rinse skin with plenty of water or shower.
Eyes	Redness.	Wear safety goggles.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion		Do not eat, drink, or smoke during work.	Rinse mouth.

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 4.1; UN Pack Group: III
STORAGE
Separated from incompatible materials. See Chemical Dangers.
PACKAGING

SILICON

ICSC: 1508

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance STEEL-GREY CRYSTALS OR BLACK-TO-BROWN AMORPHOUS POWDER. Physical dangers Dust explosion possible if in powder or granular form, mixed with air. If dry, it can be charged electrostatically by swirling, pneumatic transport, pouring, etc. Chemical dangers Reacts violently with oxidants, halogens, metal carbonates and metal acetylides. This generates fire hazard. Reacts violently with metal hexafluorides. This generates fire and explosion hazard. Reacts on heating with water. This produces flammable/explosive gas (hydrogen - see ICSC 0001).	Formula: Si Atomic mass: 28.09 Boiling point: 2355°C Melting point: 1410°C Density: 2.33 g/cm³ Solubility in water: none

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
STEEL-GREY CRYSTALS OR BLACK-TO-BROWN AMORPHOUS POWDER.

Physical dangers
Dust explosion possible if in powder or granular form, mixed with air. If dry, it can be charged electrostatically by swirling, pneumatic transport, pouring, etc.

Chemical dangers
Reacts violently with oxidants, halogens, metal carbonates and metal acetylides. This generates fire hazard. Reacts violently with metal hexafluorides. This generates fire and explosion hazard. Reacts on heating with water. This produces flammable/explosive gas (hydrogen - see ICSC 0001).

Formula: Si
Atomic mass: 28.09
Boiling point: 2355°C
Melting point: 1410°C
Density: 2.33 g/cm³
Solubility in water: none

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation. Effects of short-term exposure May cause mechanical irritation to the eyes and respiratory tract.	Inhalation risk A nuisance-causing concentration of airborne particles can be reached quickly when dispersed. Effects of long-term or repeated exposure

EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation.

Effects of short-term exposure
May cause mechanical irritation to the eyes and respiratory tract.

Inhalation risk
A nuisance-causing concentration of airborne particles can be reached quickly when dispersed.

Effects of long-term or repeated exposure

OCCUPATIONAL EXPOSURE LIMITS

ENVIRONMENT

NOTES
Reacts violently with fire extinguishing agents such as water.

ADDITIONAL INFORMATION

EC Classification

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