Chemical Name
CAS-Number

Physical

Chemical

UN Class or Division /  Subsidiary Risks

AMMONIUM PERSULPHATE
7727-54-0

5.1

AMMONIUM SULPHATE
7783-20-2

8

CARBON DISULPHIDE
75-15-0

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

May explosively decompose on shock, friction, or concussion • May explode on heating • The substance may spontaneously ignite on contact with air and on contact with hot surfaces producing toxic fumes of sulphur dioxide • Reacts violently with oxidants causing fire and explosion hazard • Attacks some forms of plastic, rubber and coating

3/ 6.1

CARBONYL SULPHIDE
463-58-1

2.3/2.1

HYDROGEN SULPHIDE
7783-06-4

2.3/ 2.1

POTASSIUM PERSULPHATE
7727-21-1

5.1

POTASSIUM SULPHIDE
1312-73-8

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

Heating may cause violent combustion or explosion • May explosively decompose on shock, friction, or concussion • The substance may spontaneously ignite on contact with air forming hydrogen sulphide • The solution in water is a strong base, it reacts violently with acid and is corrosive forming sulphur dioxide

4.2

SODIUM HYDROSULPHITE
7775-14-6

4.2

SODIUM PERSULPHATE
7775-27-1

5.1

SODIUM SULPHIDE
1313-82-2

4.2

SULPHUR DIOXIDE
7446-09-5

2.3/ 8

SULPHUR TETRAFLUORIDE
7783-60-0

2.3/ 8

SULPHUR TRIOXIDE
7446-11-9

8

SULPHUR
7704-34-9

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.

On combustion, forms sulphur oxides including sulphur dioxide • Reacts violently with strong oxidants causing fire and explosion hazard

4.1

SULPHURYL CHLORIDE
7791-25-5

8

THIONYL CHLORIDE
7719-09-7

8