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Saturday, 06 August 2011 02:41

Aldehydes & Ketals: Physical & Chemical Hazards

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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

 

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Contents

Preface
Part I. The Body
Part II. Health Care
Part III. Management & Policy
Part IV. Tools and Approaches
Part V. Psychosocial and Organizational Factors
Part VI. General Hazards
Part VII. The Environment
Part VIII. Accidents and Safety Management
Part IX. Chemicals
Part X. Industries Based on Biological Resources
Part XI. Industries Based on Natural Resources
Part XII. Chemical Industries
Part XIII. Manufacturing Industries
Part XIV. Textile and Apparel Industries
Part XV. Transport Industries
Part XVI. Construction
Part XVII. Services and Trade
Part XVIII. Guides
Guide to Occupations
Guide to Chemicals
Resources
Guide to Units and Abbreviations