DICHLOROSILANE ICSC: 0442 Chlorosilane Silicon chloride hydride Cl2H2Si Molecular mass: 101.01 (cylinder) ICSC #    0442 CAS #     4109-96-0 RTECS # VV3050000 UN #        2189 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 DICHLOROSILANE ICSC: 0442 Important Data 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.