International Chemical Safety Cards

TETRAFLUOROSILANE ICSC: 0576

TETRAFLUOROSILANE
Silicon tetrafluoride
Silicon fluoride
Perfluorosilane
(cylinder)
SiF4
Molecular mass: 104.1
CAS # 7783-61-1
RTECS # VW2327000
ICSC # 0576
UN # 1859
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: powder, carbon dioxide.
EXPLOSION

In case of fire: cool cylinder by spraying with water but avoid contact of the substance with water.
 
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 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.
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 (extra 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: 8
SEE IMPORTANT INFORMATION ON BACK
ICSC: 0576 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards

TETRAFLUOROSILANE ICSC: 0576

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

PHYSICAL DANGERS:
The gas is heavier than air.

CHEMICAL DANGERS:
The substance decomposes on heating producing toxic and corrosive fumes including hydrogen fluoride (see ICSC 0283). Reacts with water to form hydrogen fluoride and silicic acid. Attacks many metals in presence of water releasing hydrogen.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV (as F (Fluorides)): ppm; 2.5 mg/m3 (ACGIH 1996).
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:
The substance is corrosive to the eyes, the skin and the respiratory tract. Inhalation of this gas may cause lung oedema (see Notes). The effects may be delayed. Medical observation is indicated.


PHYSICAL
PROPERTIES
 Boiling point: -86°C
Sublimation point: -95.7°C
 Solubility in water: reaction
Relative vapour density (air = 1): 3.6
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 spray, by a doctor or a person authorized by him/her, should be considered.
NFPA Code: H3; F0; R2; W
ADDITIONAL INFORMATION


ICSC: 0576 TETRAFLUOROSILANE
© IPCS, CEC, 1993
IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of 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.