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METHYLTRICHLOROSILANE
ICSC: 0301
Peer-Review Status: 03.05.2002 Validated
Trichloromethylsilane 
CAS #: 75-79-6 RTECS #: VV4550000
UN #: 1250
EC #: 014-004-00-5
EINECS #: 200-902-6
    Formula: CH3SiCl3
Molecular mass: 149.5

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames, NO sparks and NO smoking. NO contact with hot surfaces.  Use AFFF, powder, carbon dioxide. NO hydrous agents. NO water. 
EXPLOSION Vapour/air mixtures are explosive.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling.  In case of fire: keep drums, etc., cool by spraying with water. NO direct contact with water. 
 
EXPOSURE   STRICT HYGIENE!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Burning sensation. Cough. Sore throat. Laboured breathing. Shortness of breath. Symptoms may be delayed. See Notes.  Use closed system or ventilation.  Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention. See Notes. 
Skin Redness. Blisters. Pain. Skin burns.  Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
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
PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Personal protection: complete protective clothing including self-contained breathing apparatus. Do NOT wash away into sewer. Collect leaking and spilled liquid in sealable dry non-plastic containers as far as possible. Absorb remaining liquid in dry sand or inert absorbent. Then store and dispose of according to local regulations.  Airtight.
Unbreakable packaging.
Put breakable packaging into closed unbreakable container. 
EC Classification
Symbol: F, Xi; R: 11-14-36/37/38; S: (2)-26-39 
UN Classification
UN Hazard Class: 3; UN Subsidiary Risks: 8; UN Pack Group: I 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-30GFC-I-X.
NFPA Code: H3; F3; R2; W. 
Fireproof. Separated from oxidants. Cool. Dry. Well closed. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS LIQUID WITH PUNGENT ODOUR. 

Physical dangers
The vapour is heavier than air and may travel along the ground; distant ignition possible. 

Chemical dangers
Decomposes on burning. This produces hydrogen chloride. Reacts violently with strong oxidants. Reacts violently with water and moist air. This produces hydrogen chloride (see ICSC 0163). Attacks metals such as aluminium and magnesium. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):. 

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

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 short-term exposure
The substance is corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. Inhalation may cause lung oedema. Exposure could cause death. Medical observation is indicated. See Notes. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 66°C
Melting point: -90°C
Relative density (water = 1): 1.3
Solubility in water: reaction
Vapour pressure, kPa at 20°C: 17.9
Relative vapour density (air = 1): 5.2
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.73
Flash point: 8°C
Auto-ignition temperature: 490°C
Explosive limits, vol% in air: 7.2-11.9 
 

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 spray, by a doctor or a person authorized by him/her, should be considered.
Toxicological properties are inferred from those of Methyldichlorosilane (ICSC 0297). 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
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    See Also:
       Toxicological Abbreviations