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"Chemical Name CAS-Number Physical Chemical UN Class/Div / Subsidiary RisksChemical ACETAL 105-57-7 3 ACETALDEHYDE 75-07-0 The vapour is heavier than air and may travel along the ground; distant ignition possible The substance can form explosive peroxides in contact with air • The substance may polymerize under the influence of acids, alkaline materials, such as sodium hydroxide, in the presence of trace metals (iron) with fire or explosion hazard • The substance is a strong reducing agent and reacts violently with oxidants • Reacts violently with various organic substances, halogens, sulfuric acid and amines, causing fire and explosion hazard 3 ACROLEIN 107-02-8 The vapour is heavier than air and may travel along the ground; distant ignition possible The substance can form explosive peroxides • The substance may polymerize with fire and explosion hazard • Upon heating, toxic fumes are formed • Reacts with alkalis, acids, amines, sulfur dioxide, thiourea, metal salts and oxidants causing fire and explosion hazard 6.1/ 3 BUTYLALDEHYDE 123-72-8 The vapour is heavier than air, and may travel along the ground; distant ignition possible The substance may polymerize due to heating, under the influence of acids or alkalis • On combustion, forms toxic gases • Reacts with oxidants • Reacts violently with strong acids and bases 3 CHLORAL 75-87-6 6.1 CHLOROACETALDEHYDE 107-20-0 The vapour is heavier than air Upon heating, toxic fumes are formed • Reacts with water to form a hydrate with the evolution of some heat • Reacts with oxidants and acids, causing explosion hazard • The anhydrous substance can polymerize on standing 6.1 o-CHOROBENZALDEHYDE 89-98-5 The substance decomposes on heating, producing toxic and corrosive fumes including hydrogen chloride • Acts with iron, strong bases, strong oxidants, strong reducing agents and moisture CROTONALDEHYDE 4170-30-3 6.1/ 3 2,2-DIMETHYL-1,3-DIOXOLANE-4-METHANOL 100-79-8 Reacts with oxidants p-DIOXANE 123-91-1 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 • Reacts vigorously with strong oxidants and concentrated strong acids • Reacts explosively with some catalysts (eg, Raney-nickel above 210 °C) • Attacks many plastics 3 2-ETHYL HEXALDEHYDE 123-05-7 The vapour is heavier than air The substance can form explosive peroxides on long-lasting contact with oxygen or air • The substance polymerize on contact with sodium hydroxide, ammonia, butyl- and dibutylamine, inorganic acids • Reacts with oxidants 3 FORMALDEHYDE 50-00-0 3/ 8 GLYCIDALDEHYDE 765-34-4 3/ 6.1 GLUTARALDEHYDE 111-30-8 Produces acrid smoke and fumes (carbon monoxide, carbon dioxide) 3-HYDROXYBUTYRALDEHYDE 107-89-1 6.1 ISOBUTYRALDEHYDE 78-84-2 3 METHYLAL 109-87-5 The vapour is heavier than air and may travel along the ground; distant ignition possible The substance can presumably form explosive peroxides • May explode on heating and on burning producing carbon dioxide and/or carbon monoxideReacts vigorously with strong oxidants causing fire and explosion hazard 3 PARAFORMALDEHYDE 30525-89-4 Dust explosion possible if in powder or granular form, mixed with air The substance decomposes on heating producing formaldehyde • Reacts with oxidants • Reacts with strong acids and strong bases producing formaldehyde 4.1 PARALDEHYDE 123-63-7 3 PHENYL CHLOROFORMATE 1885-14-9 6.1/ 8 PROPANAL 123-38-6 The vapour is heavier than air and may travel along the ground; distant ignition possible The substance may polymerize due to heating and under the influence of acids and caustics • On combustion, forms toxic gases (carbon oxides) and combustible gas • Reacts violently with oxidants, acids and bases 3 VALERALDEHYDE 110-62-3 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   Back"
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