Extremely flammable. Gas/air mixtures are explosive.
NO open flames, NO sparks and NO smoking. Closed system, ventilation, explosion-proof electrical equipment and lighting.
Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out. In other cases extinguish with powder, carbon dioxide. Combat fire from a sheltered position.
Cough. Headache. Nausea. Sore throat.
Use ventilation, local exhaust or breathing protection.
Fresh air, rest. Refer for medical attention.
Redness. ON CONTACT WITH LIQUID: FROSTBITE.
ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Rinse skin with plenty of water or shower.
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.
CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Personal protection: self-contained breathing apparatus. Ventilation. Remove gas with fine water spray.
According to UN GHS Criteria
Transportation UN Classification
UN Hazard Class: 2.1
PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS GAS WITH CHARACTERISTIC ODOUR.
Physical dangers The gas is heavier than air.
Chemical dangers The substance may ignite spontaneously on contact with air. Decomposes on heating and on burning. This produces silicon and hydrogen. This generates fire and explosion hazard. The substance is a strong reducing agent. It reacts violently with oxidants. Reacts with potassium hydroxide solution and halogens.
Molecular mass: 32.1
Boiling point: -112°C Melting point: -185°C Solubility in water: slow reaction Relative vapour density (air = 1): 1.3 Explosive limits, vol% in air: 1.37-100
EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation.
Effects of short-term exposure The substance is irritating to the eyes, skin and respiratory tract. Rapid evaporation of the liquid may cause frostbite.
Inhalation risk A harmful concentration of this gas in the air will be reached very quickly on loss of containment.
Effects of long-term or repeated exposure
OCCUPATIONAL EXPOSURE LIMITS
TLV: 5 ppm as TWA
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