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Friday, 05 August 2011 00:09

Acids and Anhydrides,Organic: Physical & Chemical Hazards

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Chemical Name

CAS-Number

Physical

Chemical

UN Class or Division /  Subsidiary Risks

ACETIC ACID
64-19-7

The substance is a medium strong acid • Reacts violently with oxidants such as chromium trioxide and potassium permanganate • Reacts violently with strong bases • Attacks many metals forming combustible gas

8

ACETIC ANHYDRIDE
108-24-7

The substance decomposes on heating producing toxic fumes and gases including acetic acid • Reacts violently with boiling water, steam, strong oxidants, alcohols, amines, strong bases, and many other compounds • Attacks many metals in presence of water • The liquid is very corrosive, especially in presence of water or moisture

8/ 3

ACETYLSALICYLIC ACID
50-78-2

Dust explosion possible if in powder or granular form, mixed with air

The substance decomposes on contact with hot water or when dissolved in solutions of alkali hydroxides and carbonates • Upon heating, toxic fumes are formed • Reacts with strong oxidants, strong acids, strong bases

ACRYLIC ACID
79-10-7

The vapour is heavier than air • Vapour forms explosive mixture with air

The substance polymerizes readily due to heating, under the influence of light, oxygen, oxidizing agents such as peroxides or other activators (acid, iron salts), with fire or explosion hazard • Upon heating, toxic fumes are formed • The substance is a medium strong acid • Reacts violently with oxidants causing fire and explosion hazard • Reacts violently with strong bases and amines • Attacks many metals, including nickel and copper

8/ 3

ADIPIC ACID
124-04-9

Dust explosion possible if in powder or granular form, mixed with air • If dry, it can be charged electrostatically by swirling, pneumatic transport, pouring, etc.

The substance decomposes on heating producing volatile acidic vapours of valeric acid and other substances • The substance is a weak acid • Reacts with oxidizing materials

L-ASCORBIC ACID
50-81-7

The solution in water is a medium strong acid • Attacks many metals in presence of water

BENZOIC ACID
65-85-0

Dust explosion possible if in powder or granular form, mixed with air

The solution in water is a weak acid • Reacts with oxidants

BUTYRIC ACID
107-92-6

8

n-CAPROIC ACID
142-62-1

May explode on heating • On combustion, forms toxic/irritant gases • The substance is a medium strong acid • Reacts violently with oxidants (for instance chromium trioxide) causing fire and explosion hazard • Reacts vigorously with bases causing heat and pressure rise hazard • Attacks many metals forming combustible gas

8

CHLOROACETIC ACID
79-11-8

The substance decomposes on heating producing toxic and corrosive gases (hydrogen chloride, phosgene) • The solution in water is a strong acid, it reacts violently with bases and is corrosive

6.1/ 8

CITRIC ACID
77-92-9

Dust explosion possible if in powder or granular form, mixed with air

Reacts with oxidants, reductants, bases

CITRIC ACID HYDRATE
5949-29-1

The solution in water is a medium strong acid • Reacts violently with metal nitrates • Reacts with strong bases and oxidants • The substance will corrode copper, zinc, aluminium, and their alloys

CROTONIC ACID
3724-65-0

The substance may polymerize under the influence of UV-light or moisture • The solution in water is a weak acid • Reacts violently with bases, oxidants, reducing agents, causing fire and explosion hazard

8

DICHLOROACETIC ACID
79-43-6

The substance decomposes on heating producing toxic and corrosive fumes (phosgene, hydrogen chloride) • The substance is a medium strong acid • Attacks many metals forming flammable hydrogen gas • Attacks rubber

8

2,4-DICHLOROPHENOXY ACETIC ACID
94-75-7

The substance decomposes on heating producing hydrogen chloride and phosgene • The substance is a weak acid • Reacts with strong oxidants causing fire and explosion hazard

ETHANEDIOIC ACID, DIHYDRATE
6153-56-6

The substance decomposes on rapid heating above about 150°C producing toxic gas • The solution in water is a medium strong acid which reacts violently with strong bases • Reacts violently with oxidants causing fire and explosion hazard • Reacts with silver, forming explosive products

2-ETHYL HEXANOIC ACID
149-57-5

As a result of flow, agitation, etc, electrostatic charges can be generated • Vapour mixes readily with air

The substance is a strong reducing agent and reacts with oxidants • Reacts with strong oxidants

FLUOROACETIC ACID
144-49-0

6.1

FORMIC ACID
64-18-6

The substance decomposes on heating producing carbon monoxide • The substance is a medium strong acid • Reacts violently with oxidants • Reacts violently with strong bases causing fire and explosion hazard • Attacks many metals in presence of water • Attacks many plastics

8

ISOBUTYRIC ACID
79-31-2

3/ 8

LACTIC ACID
598-82-3

The substance is a medium strong acid • Attacks many metals in presence of water

MALEIC ACID
110-16-7

On combustion, forms irritating smoke (maleic anhydride) • The substance decomposes on heating and on burning producing highly irritating fumes (maleic anhydride) • The solution in water is a medium strong acid

MALEIC ANHYDRIDE
108-31-6

The solution in water is a strong acid, it reacts violently with bases and is corrosive • Reacts with strong oxidants

8

METHACRYLIC ACID
79-41-4

The substance polymerizes easily due to heating or under the presence of light, oxygen, oxidizing agents such as peroxides, or in the presence of traces of hydrochloric acid, with fire or explosion hazard • The substance decomposes on heating producing acrid fumes • The substance is a strong reducing agent and reacts with oxidants • The substance is a medium strong acid • Attacks metals

8

2-METHYL-4-CHLOROPHENOACETIC ACID
94-74-6

The substance decomposes on heating producing toxic and corrosive fumes including hydrogen chloride • The substance is a weak acid

OXALIC ACID
144-62-7

On contact with hot surfaces or flames this substance decomposes forming formic acid and carbon monoxide • The substance is a strong reducing agent and reacts with oxidants • The solution in water is a medium strong acid • Reacts violently with strong oxidants causing fire and explosion hazard • Reacts with some silver compounds to form explosive silver oxalate

PALMITIC ACID
57-10-3

On heating forms carbon oxides • The substance is a weak acid • Reacts with bases, oxidants, and reducing agents

PHTALIC ANHYDRIDE
85-44-9

8

PHTHALIC ACID
88-99-3

The solution in water is a medium strong acid

PROPIONIC ACID
79-09-4

The substance is a medium strong acid • Reacts with oxidants • Attacks many metals in presence of water

8

PROPIONIC ANHYDRIDE
123-62-6

The vapour is heavier than air

On combustion, forms toxic gases • Reacts with oxidants, bases and water

8

SALICYLIC ACID
69-72-7

Dust explosion possible if in powder or granular form, mixed with air

The substance decomposes on heating producing phenol vapours • The substance is a medium strong acid • Reacts violently with strong bases and strong oxidants

STEARIC ACID
57-11-4

The substance decomposes on heating producing carbon oxides • The substance is a weak acid • Reacts with bases, oxidants and reducing agents

SULPHANILIC ACID
121-57-3

On combustion, forms toxic gases of carbon, nitrogen and sulphur oxides • The substance decomposes on heating • Reacts with oxidants

TEREPHTHALIC ACID
100-21-0

Dust explosion possible if in powder or granular form, mixed with air

Reacts violently with strong oxidants

p-TOLUENESULFONIC ACID
104-15-4

The substance decomposes on burning producing carbon oxides and sulphur oxides • The substance is a strong acid, it reacts violently with bases and is corrosive • Attacks many metals forming extremely flammable gas

2,4,5-TRICHLOROPHENOXYACETIC ACID
93-76-5

6.1

TRIFLUOROACETIC ACID
76-05-1

8

TRIMELLITIC ANHYDRIDE
552-30-7

Dust explosion possible if in powder or granular form, mixed with air • If dry, it can be charged electrostatically by swirling, pneumatic transport, pouring, etc

Reacts violently with oxidants • Reacts slowly with water to form trimellitic acid

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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Read 2926 times Last modified on Friday, 05 August 2011 00:16

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