ICSC 0574 - TETRACHLOROSILANE

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TETRACHLOROSILANE	ICSC: 0574 (May 2002)
Silicon tetrachloride Silicon chloride

CAS #: 10026-04-7

UN #: 1818

EC Number: 233-054-0

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.		NO water. In case of fire in the surroundings, use appropriate extinguishing media. In case of fire: keep drums, etc., cool by spraying with water. NO direct contact with water.

STRICT HYGIENE! IN ALL CASES CONSULT A DOCTOR!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough. Sore throat. Burning sensation. Laboured breathing. Shortness of breath. Symptoms may be delayed. See Notes.	Use ventilation, local exhaust or breathing protection.	Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention. See Notes.
Skin	Redness. Pain. Blisters. Skin burns.	Protective gloves. Protective clothing.	Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . Wear protective gloves when administering first aid.
Eyes	Redness. Pain. Severe deep burns.	Wear face shield or eye protection in combination with breathing protection.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion	Burning sensation. Abdominal pain. Shock or collapse.	Do not eat, drink, or smoke during work.	Rinse mouth. Do NOT induce vomiting. Give nothing to drink. Refer for medical attention .

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Ventilation. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in dry sand or inert absorbent. Then store and dispose of according to local regulations.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 8; UN Pack Group: II
STORAGE
Keep under inert gas. Separated from food and feedstuffs and incompatible materials. See Chemical Dangers. Dry. Well closed. Keep in a well-ventilated room.
PACKAGING
Do not transport with food and feedstuffs.

TETRACHLOROSILANE

ICSC: 0574

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS CLEAR FUMING LIQUID WITH PUNGENT ODOUR. Physical dangers The vapour is heavier than air. Chemical dangers Decomposes on heating. This produces toxic and corrosive fumes including hydrogen chloride. Reacts violently with water, strong oxidants, strong acids, alcohols, bases, ketones and aldehydes. This produces hydrogen chloride (see ICSC 0163). Attacks many metals in the presence of water.	Formula: SiCl₄ Molecular mass: 169.89 Boiling point: 57°C Melting point: -68°C Relative density (water = 1): 1.48 Solubility in water: reaction Vapour pressure, kPa at 20°C: 26 Relative vapour density (air = 1): 5.9 Relative density of the vapour/air-mixture at 20°C (air = 1): 2.2

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS CLEAR FUMING LIQUID WITH PUNGENT ODOUR.

Physical dangers
The vapour is heavier than air.

Chemical dangers
Decomposes on heating. This produces toxic and corrosive fumes including hydrogen chloride. Reacts violently with water, strong oxidants, strong acids, alcohols, bases, ketones and aldehydes. This produces hydrogen chloride (see ICSC 0163). Attacks many metals in the presence of water.

Formula: SiCl₄
Molecular mass: 169.89
Boiling point: 57°C
Melting point: -68°C
Relative density (water = 1): 1.48
Solubility in water: reaction
Vapour pressure, kPa at 20°C: 26
Relative vapour density (air = 1): 5.9
Relative density of the vapour/air-mixture at 20°C (air = 1): 2.2

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation of its vapour and by ingestion. Effects of short-term exposure The substance and the vapour are corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. Inhalation of the vapour may cause lung oedema. See Notes. Inhalation of the vapour may cause asthma-like reactions. The effects may be delayed. Exposure could cause death. Medical observation is indicated.	Inhalation risk No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20°C. Effects of long-term or repeated exposure

EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its vapour and by ingestion.

Effects of short-term exposure
The substance and the vapour are corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. Inhalation of the vapour may cause lung oedema. See Notes. Inhalation of the vapour may cause asthma-like reactions. The effects may be delayed. Exposure could cause death. Medical observation is indicated.

Inhalation risk
No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20°C.

Effects of long-term or repeated exposure

OCCUPATIONAL EXPOSURE LIMITS

ENVIRONMENT

NOTES
Reacts violently with fire extinguishing agents such as water. The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. Immediate administration of an appropriate inhalation therapy by a doctor, or by an authorized person, should be considered. Toxicological properties are inferred from those of Methyldichlorosilane (ICSC 0297).

NOTES

Reacts violently with fire extinguishing agents such as water.
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort.
Rest and medical observation are therefore essential.
Immediate administration of an appropriate inhalation therapy by a doctor, or by an authorized person, should be considered.
Toxicological properties are inferred from those of Methyldichlorosilane (ICSC 0297).

ADDITIONAL INFORMATION

EC Classification
Symbol: Xi; R: 14-36/37/38; S: (2)-7/8-26

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