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Sunday, 07 August 2011 00:35

Azides: Physical & Chemical Hazards

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Chemical Name

CAS-Number

Physical

Chemical

UN Class or Division /  Subsidiary Risks

1,1'-AZOBIS(FORMAMIDE)
123-77-3

The substance decomposes on heating or on burning producing toxic fumes (nitrogen oxides)

8

CYANURIC CHLORIDE
108-77-0

3

1,1-DIMETHYLHYDRAZINE
57-14-7

The vapour is heavier than air and may travel along the ground; distant ignition possible

The substance may spontaneously ignite on contact with air • in the presence of oxidizing agents • Reacts vigorously with oxidizing material such as air; vapour is inflammable in air • On combustion, forms toxic and/or flammable fumes including nitrogen oxides, hydrogen, ammonia, dimethylamine and hydrazoic acid • toxic fumes nitrogen • The substance is a strong reducing agent and reacts violently with oxidants like nitrogen tetroxide, hydrogen peroxide and nitric acid • The substance is a strong base, it reacts violently with acid and is corrosive • Reacts with oxygen causing fire and explosion hazard • Attacks plastic

6.1/ 3

1,2-DIMETHYLHYDRAZINE
540-73-8

EDETIC ACID
60-00-4

The substance decomposes on heating producing nitrous oxides • Reacts with strong oxidants, strong bases, copper, copper alloys and nickel

3/ 3/ 6.1

HYDRAZINE
302-01-2

6.1/ 3/ 8

METHYLHYDRAZINE
60-34-4

6.1/ 3/ 8

METHYLHYDRAZINE HYDROCHLORIDE
7339-53-9

6.1

PHENYLHYDRAZINE
100-63-0

The substance decomposes on heating and on burning producing toxic fumes including nitrogen oxides • Reacts with oxidants • Reacts violently with lead dioxide

6.1

PHENYLHYDRAZINE HYDROCHLORIDE
59-88-1

6.1

SODIUM AZIDE
26628-22-8

May explode on heating above melting point, especially on rapid heating causing fire and explosion hazard • The solution in water is a weak base • Reacts with copper, lead, silver, mercury and carbon disulfide to form particularly shock-sensitive compounds • Reacts with acids, forming toxic and explosive hydrogen azide • Very corrosive to aluminium

5.1

SODIUM DICHLOROCYANURATE
2893-78-9

The substance decomposes on heating, on contact with water, producing toxic fumes • The substance is a strong oxidant and reacts violently with combustible and reducing materials • The substance is a strong reducing agent and reacts with oxidants • The solution in water is a weak acid • Reacts violently with many substances causing fire and explosion hazard

1,2,4-TRIAZOLE
288-88-0

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

The substance decomposes on boiling • Upon heating, toxic fumes are formed • Reacts with strong oxidants and strong bases

5.1

TRICHLOROISOCYANURIC ACID
87-90-1

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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