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DICHLOROSILANE

ICSC: 0442

Chlorosilane
Silicon chloride hydride
Cl2H2Si
Molecular mass: 101.01
(cylinder)
ICSC # 0442 		CAS # 4109-96-0
RTECS # VV3050000
UN # 2189
July 04, 1997 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Extremely flammable. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames, NO sparks, and NO smoking.
Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out; in other cases extinguish with foam, powder.
EXPLOSION Gas/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting.
Combat fire from a sheltered position.
EXPOSURE
AVOID ALL CONTACT!

•INHALATION Sore throat. Cough. Burning sensation. Shortness of breath. Laboured breathing. Symptoms may be delayed (see Notes).
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Refer for medical attention.
•SKIN Pain. Redness. Blisters. Skin burns. Serious frostbite.
Cold-insulating gloves. Protective clothing.
Rinse skin with plenty of water or shower. Refer for medical attention.
•EYES Pain. Redness. Severe deep burns. Loss of vision.
Safety goggles or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION


SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Evacuate danger area! Consult an expert! Ventilation. Personal protection: chemical protection suit including self-contained breathing apparatus.
Fireproof. Keep in a well-ventilated room.
Do not transport with food and feedstuffs.
UN Hazard Class: 2.3
UN Subsidiary Risks: 2.1 and 8
ICSC: 0442 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

DICHLOROSILANE

ICSC: 0442

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A

N

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D

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A

PHYSICAL STATE; APPEARANCE:
COLOURLESS GAS , WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:
The gas is heavier than air and may travel along the ground; distant ignition possible.

CHEMICAL DANGERS:
The substance may spontaneously ignite on contact with air. The substance decomposes on heating or on burning producing toxic fumes including hydrogen chloride . Reacts with water or moist air to form hydrogen chloride. Attacks many metals in presence of water.

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.

INHALATION RISK:
A harmful concentration of this gas in the air will be reached very quickly on loss of containment.

EFFECTS OF SHORT-TERM EXPOSURE:
Tear drawing. The substance is corrosive to the eyes, the skin and the respiratory tract. Inhalation of this substance may cause lung oedema (see Notes). Rapid evaporation of the liquid may cause frostbite. Exposure at high levels may result in death. The effects may be delayed. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Boiling point: 8°C
Melting point: -122°C
Solubility in water:
reaction
Vapour pressure, kPa at 20°C: 163.6
Relative vapour density (air = 1): 3.48
Flash point: -28°C c.c.
Explosive limits, vol% in air: 4.1-99

ENVIRONMENTAL
DATA


N O T E S

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 a person authorized by him/her, should be considered. Card has been partly updated in October 2005. See section Emergency Response.
Transport Emergency Card: TEC (R)-20G2TFC

NFPA Code: H3; F4; R2; W

ADDITIONAL INFORMATION



ICSC: 0442 DICHLOROSILANE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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