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TETRAFLUOROSILANE
(cylinder)
ICSC: 0576
Peer-Review Status: 04.07.1997 Validated
Silicon tetrafluoride
Silicon fluoride
Perfluorosilane 
CAS #: 7783-61-1 RTECS #: VW2327000
UN #: 1859
EINECS #: 232-015-5
    Formula: SiF4
Molecular mass: 104.1

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE 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. 
EXPLOSION     In case of fire: keep cylinder cool by spraying with water. NO direct contact with water. 
 
EXPOSURE   AVOID ALL CONTACT!   
Inhalation Sore throat. Cough. Burning sensation. Shortness of breath. Laboured breathing. Symptoms may be delayed. See Notes.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Refer for medical attention. 
Skin Redness. ON CONTACT WITH LIQUID: FROSTBITE.  Cold-insulating gloves. Protective clothing.  Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness.  Wear 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 refer for medical attention. 
Ingestion      

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Ventilation. Personal protection: chemical protection suit including self-contained breathing apparatus.  Do not transport with food and feedstuffs. 
EC Classification
 
UN Classification
UN Hazard Class: 2.3; UN Subsidiary Risks: 8 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-20G1TC.
NFPA Code: H3; F0; R2; W. 
Fireproof. Keep in a well-ventilated room. 

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

Physical dangers
The gas is heavier than air. 

Chemical dangers
Decomposes on heating. This produces toxic and corrosive fumes including hydrogen fluoride (see ICSC 0283). Reacts with water. This produces hydrogen fluoride and silicic acid. Attacks many metals in the presence of water. This produces flammable/explosive gas (hydrogen - see ICSC 0001). 

Occupational exposure limits
TLV (as F): 2.5mg/m³ as TWA; A4 (not classifiable as a human carcinogen); BEI issued; (ACGIH 2005).
MAK (inhalable fraction): 1 mg/m³; Peak limitation category: II(4); Pregnancy risk group: C; Skin absorption (H); (DFG 2005). 

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
The substance is corrosive to the eyes, skin and respiratory tract. Inhalation of of this gas may cause lung oedema. See Notes. The effects may be delayed. Medical observation is indicated. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Sublimation point: -95.7°C
Solubility in water: reaction
Relative vapour density (air = 1): 3.6  
 

NOTES
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 is 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 sections Occupational Exposure Limits, Emergency Response. 

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
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.
    See Also:
       Toxicological Abbreviations