|
Chemical Name |
Physical |
Chemical |
UN Class or Division / Subsidiary Risks |
|
ETHYL SILICATE |
3 |
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METHYL DICHLOROSILANE |
4.3/ 3/ 8 |
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|
METHYL TRICHLOROSILANE |
The vapour is heavier than air and may travel along the ground; distant ignition possible |
The substance decomposes on heating producing hydrogen chloride • Reacts violently with strong oxidants • Reacts violently with water and moisture producing hydrogen chloride, causing fire and explosion hazard • Attacks metals like aluminium and magnesium |
3/ 8 |
|
POLYDIMETHYLSILOXANE |
The substance decomposes on heating (>150 ºC) producing formaldehyde in small amounts |
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SILANE, DICHLORO- |
The gas is heavier than air |
Reacts violently with water • On contact with air it emits hydrogen chloride |
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SILICIC ACID, DISODIUM SALT |
The substance is a strong base, it reacts violently with acid and is corrosive in moist air to metals like zinc, aluminium, tin and lead forming a flammable/explosive gas (hydrogen) |
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SILICON TETRAHYDRIDE |
The gas is heavier than air |
The substance may spontaneously ignite on contact with air room temperature |
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SILICON TETRAFLUORIDE |
The gas is heavier than air |
Reacts violently with water • On contact with air it emits hydrogen fluoride |
2.3/ 8 |
|
SILICON |
4.1 |
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|
TETRACHLOROSILANE |
The vapour is heavier than air |
Reacts violently with water • On contact with air it emits hydrogen chloride and silicic acid |
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TRICHLOROSILANE |
The vapour is heavier than air and may travel along the ground; distant ignition possible |
Reacts violently with water • On contact with air it emits hydrogen chloride • Attacks many metals in presence of water |
4.3/ 3/ 8 |
|
TRIMETHYLCHLOROSILANE |
The vapour is heavier than air and may travel along the ground; distant ignition possible |
The substance decomposes on heating producing toxic and corrosive fumes (hydrogen chloride, phosgene) • Reacts violently with water, ketones, alcohol, amines and many other substances, causing explosion hazard • On contact with air it emits corrosive fumes of hydrogen chloride |
3/ 8 |
For UN Class: 1.5 = very insensitive substances which have a mass explosion hazard; 2.1 = flammable gas; 2.3 = toxic gas; 3 = flammable liquid; 4.1 = flammable solid; 4.2 = substance liable to spontaneous combustion; 4.3 = substance which in contact with water emits flammable gases; 5.1 = oxidizing substance; 6.1 = toxic; 7 = radioactive; 8 = corrosive substance