Chemical Name
CAS-Number

Physical

Chemical

UN Class or Division /  Subsidiary Risks

ACETONITRILE
75-05-8

The vapour is heavier than air and may travel along the ground; distant ignition possible • The vapour mixes well with air, explosive mixtures are easily formed • As a result of flow, agitation, etc, electrostatic charges can be generated

On combustion, forms toxic fumes of hydrogen cyanide and nitrogen oxides • The substance decomposes on contact with acids, water and steam producing toxic fumes and flammable vapour • On contact with strong oxidants causes fire and explosion hazard • Attacks some forms of plastic, rubber and coating

3

ACRYLONITRILE
107-13-1

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

The substance polymerizes due to heating, under the influence of light, bases and peroxides • Heating may cause violent combustion or explosion • The substance decomposes on heating producing toxic fumes including nitrogen oxides, hydrogen cyanide • Reacts violently with strong oxidants and strong bases causing fire and explosion hazard

3/ 6.1

ADIPONITRILE
111-69-3

6.1

ALLYL ISOTHIOCYANATE
57-06-7

The substance decomposes on heating producing cyanhydric acid vapours • Reacts with strong oxidants

6.1

BENZONITRILE
100-47-0

The substance decomposes on heating or on burning on contact with acids, producing very toxic fumes (hydrogen cyanide, nitrous oxides) • Reacts violently with strong acids producing highly toxic hydrogen cyanide • Attacks some plastics

6.1

BUTYRONITRILE
109-74-0

3/ 6.1

CALCIUM CYANAMIDE
156-62-7

4.3

CALCIUM CYANIDE
592-01-8

The substance decomposes on heating above 350 °C producing toxic fumes (hydrogen cyanide, nitrous oxides) • Reacts violently with water, moist air, carbon dioxide, acids, acidic salts producing highly toxic and flammable hydrogen cyanide • Reacts violently when heated with nitrites, nitrates, chlorates and perchlorates

6.1

CHLOROACETONITRILE
107-14-2

The vapour is heavier than air

On contact with hot surfaces or flames this substance decomposes forming toxic and flammable vapours • Reacts with strong oxidants, reducing agents, acids, bases, steam, producing highly toxic and flammable fumes

6.1/ 3

CYANAMIDE
420-04-2

The substance may polymerize at temperatures above 122 °C • Substance decomposes on warming above 49 °C, on contact with acids, bases and moisture producing toxic fumes including nitrogen oxides and cyanides • Reacts with acids, strong oxidants, strong reducing agents and water causing explosion and toxic hazard • Attacks various metals

CYANOGEN
460-19-5

2.3/ 2.1

CYANOGEN BROMIDE
506-68-3

The vapour is heavier than air

The substance decomposes on heating or on contact with acids, producing highly toxic and flammable hydrogen cyanide and corrosive hydrogen bromide • Reacts slowly with water and water vapour, forming hydrogen bromide and hydrogen cyanide

CYANOGEN CHLORIDE
506-77-4

The gas is heavier than air

The substance may polymerize violently if contaminated with hydrogen chloride or ammonium chloride • The substance decomposes on heating producing toxic and corrosive fumes (hydrogen cyanide, hydrochloric acid, nitrogen oxides) • Reacts slowly with water or water vapour to form hydrogen chloride • Attacks copper and brass

DIALLYL CYANURATE
1081-69-2

2.3/ 8

DICYANODIAMIDE
461-58-5

The substance decomposes on heating producing toxic gases • Reacts violently with strong oxidants, causing fire and explosion hazard • Reacts with acids to form toxic gases

2.3/ 2.1

2-HYDROXY-2-METHYLPROPIONITRILE
75-86-5

The substance decomposes on heating and on burning producing hydrogen cyanide • Reacts with strong oxidants, strong bases and strong acids • Reacts violently with alkali metals causing fire and explosion hazard

6.1

HYDROGEN CYANIDE
74-90-8

The gas mixes well with air, explosive mixtures are easily formed

The substance may polymerize due to heating above 184 °C or under the influence of bases, 2-5% water or if not chemically stabilized with fire or explosion hazard • On combustion, forms carbon monoxide and nitrogen oxides • The substance decomposes on contact with bases, causing fire and explosion hazard • The substance is a weak acid • The solution in water is a weak acid • Reacts violently with excess of strong acid causing fire and explosion hazard • Attacks many metals in presence of water

6.1/ 3

IODINE CYANIDE
506-78-5

The substance may polymerize due to heating or under the influence of acids, producing very toxic gas (hydrogen cyanide) • The substance decomposes slowly on contact with water or humidity producing very toxic gas (hydrogen cyanide) • Reacts violently with strong oxidants • May decompose on exposure to light

ISOBUTYRONITRILE
78-82-0

3/ 6.1

ISOCYANURIC ACID
108-80-5

6.1/ 8

MALONONITRILE
109-77-3

6.1

METHYLACRYLONITRILE
126-98-7

3/ 6.1

PHENYLACETONITRILE
140-29-4

6.1

SODIUM CYANIDE
143-33-9

The substance decomposes on burning producing toxic fumes (nitrogen oxides) • The substance is a strong base, it reacts violently with acid and is corrosive to metals (aluminum and zinc) • Reacts violently with strong oxidants such as nitrates and chlorates causing fire and explosion hazard • The substance decomposes in the presence of air, moisture or carbon dioxide producing highly toxic and flammable gas (hydrogen cyanide) • Contact with acids and acids salts causes immediate formation of highly toxic and flammable hydrogen cyanide gas

6.1

PROPIONITRILE
107-12-0

The vapour mixes well with air, explosive mixtures are easily formed

The substance decomposes on heating producing toxic fumes including nitrogen oxides and hydrogen cyanide • Reacts violently with strong oxidants causing fire and explosion hazard • Reacts with acids, steam, warm water giving off toxic and flammable hydrogen cyanide

3/ 6.1

POTASSIUM CYANIDE
151-50-8

The substance decomposes on contact with water, humidity, alkali carbonates, and acids, producing very toxic hydrogen cyanide gas • The solution in water is a strong base, it reacts violently with acid and is corrosive

6.1

TETRAMETHYLSUCCINONITRILE
3333-52-6

The substance decomposes on heating producing toxic fumes (hydrogen cyanide, nitrogen oxides) • Reacts with strong oxidants causing fire and explosion hazard