|
Chemical Name |
Physical |
Chemical |
UN Class or Division / Subsidiary Risks |
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cis-2-BUTENE |
The gas is heavier than air and may travel along the ground; distant ignition possible, and may accumulate in low ceiling spaces causing deficiency of oxygen • As a result of flow, agitation, etc, electrostatic charges can be generated |
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trans-2-BUTENE |
The gas is heavier than air and may travel along the ground; distant ignition possible, and may accumulate in low ceiling spaces causing deficiency of oxygen • As a result of flow, agitation, etc, electrostatic charges can be generated |
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1,3-BUTADIENE |
The gas is heavier than air, and may travel along the ground; distant ignition possible • Liquid 1,3-butadiene floats and boils on water |
The substance can under specific circumstances form peroxides, initiating explosive polymerization • The substance may polymerize due to warming with fire or explosion hazard • Shock-sensitive compounds are formed with copper and its alloys • The substance decomposes explosively on rapid heating under pressure • Reacts vigorously with oxidants and many other substances, causing fire and explosion hazard |
2.1 |
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n-BUTENE |
The gas is heavier than air, and may travel along the ground; distant ignition possible |
The substance may polymerize • May explode on heating • Reacts violently with oxygen and oxidants, causing fire and explosion hazard |
2.1 |
|
2-BUTENE |
The vapour is heavier than air and may travel along the ground; distant ignition possible • As a result of flow, agitation, etc, electrostatic charges can be generated |
The substance can polymerize in contact with organic and inorganic acids, halogens and halogenic substances |
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1,3-CYCLOHEXADIENE |
The vapour is heavier than air |
The substance can form explosive peroxides on exposure to air • On combustion, forms toxic gases • Reacts with strong oxidants causing fire and explosion hazard |
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CYCLOHEXENE |
The vapour is heavier than air and may travel along the ground; distant ignition possible • As a result of flow, agitation, etc, electrostatic charges can be generated |
The substance can form explosive peroxides • The substance may polymerize under certain conditions • Reacts with strong oxidants causing fire and explosion hazard |
3 |
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CYCLOPENTADIENE |
The vapour is heavier than air |
Reacts with nitric acid, sulfuric acid and strong oxidants, causing fire and explosion hazard • The substance dimerizes spontaneously or on contact with peroxides or trichloroacetic acid |
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ETHYLENE |
The gas is lighter than air |
The substance may polymerize to form aromatic compounds due to heating up to 600°C • Reacts violently with chlorine in sunlight causing fire and explosion hazard • Reacts with oxidants causing explosive hazard |
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ETHYLIDENE NORBORNENE |
As a result of flow, agitation, etc, electrostatic charges can be generated |
The substance may polymerize • Reacts violently with strong oxidants |
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1-HEXENE |
The vapour is heavier than air and may travel along the ground; distant ignition possible, and may accumulate in low ceiling spaces causing deficiency of oxygen |
Reacts vigorously with oxidants |
3 |
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SOBUTENE |
The gas is heavier than air and may travel along the ground; distant ignition possible, and may accumulate in low ceiling spaces causing deficiency of oxygen • As a result of flow, agitation, etc, electrostatic charges can be generated |
The substance can presumably form explosive peroxides • The substance is able to polymerize with fire or explosion hazard • Reacts violently with oxidants, chlorine, fluorine, nitrogen oxides, hydrogen chloride, hydrogen bromide, causing fire and explosion hazard • Attacks some plastics and natural rubber |
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ISOPRENE |
The vapour is heavier than air and may travel along the ground; distant ignition possible • As a result of flow, agitation, etc, electrostatic charges can be generated |
The substance can readily form explosive peroxides • The substance polymerizes with fire or explosion hazard • Heating may cause violent combustion or explosion • Reacts with strong oxidants, strong reductants, strong acids, strong bases, acid chlorides, alcohols, alkali metals |
2.1 |
|
1,7-OCTADIENE |
The vapour is heavier than air and may travel along the ground; distant ignition possible |
The substance may polymerize under the influence of radical generating substances • On combustion, forms toxic and irritating fumes • Reacts with oxidants |
3 |
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1-OCTENE |
The vapour mixes well with air, explosive mixtures are easily formed • As a result of flow, agitation, etc, electrostatic charges can be generated |
The substance can presumably form explosive peroxides • Reacts violently with strong oxidants • Reacts with acids |
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2,4,4-TRIMETHYL-1-PENTENE |
The vapour is heavier than air and may travel along the ground; distant ignition possible • As a result of flow, agitation, etc, electrostatic charges can be generated |
On combustion, forms toxic fumes • Upon heating, toxic fumes are formed • Reacts violently with oxidants |
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2,4,4-TRIMETHYL-2-PENTENE |
The vapour is heavier than air and may travel along the ground; distant ignition possible |
Upon heating, toxic fumes are formed • Reacts with oxidants |
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