Basic info on elemental Sulfur(HSE)

Basic info on elemental Sulfur(HSE)

Basic info on elemental Sulfur(HSE)
By
Admin 9/2/2015
16:53:53

Elemental sulfur is a yellow solid substance that is not hazardous. Some sulfur compounds, however, do pose risks that must be handled appropriately. Accumulations of sulfur dust can be explosive if not managed properly. Loose sulfur and sulfur dust is flammable and, when burning, decomposes into sulfur dioxide (SO2). Sulfur dust suspended in air ignites easily, and can cause an explosion in confined areas. May be ignited by friction, static electricity, heat, sparks, or flames. Toxic gases will form upon combustion. Bulk/solid forms burn only at moderate rate, whereas dust burns with explosive violence.

Molten solid is a Yellow to reddish brown liquid at a temperature of about 140°C (284°F) with a characteristic rotten egg odor. Molten Sulfur can cause burns on contact. Sulfur burns with a blue flame that may be difficult to see in daylight, and produces toxic sulfur dioxide gas. Vapor space of container may contain TOXIC concentrations of Hydrogen Sulfide, which could be fatal if inhaled or absorbed through skin. Hydrogen sulfide (H2S) may be released as liquid sulfur cools and solidifies. Hydrogen sulfide may also be released from excessive heating, agitation, or from contact with acids or acid salts. Exposure to elemental sulfur may cause irritation to the eyes, skin, and respiratory tract. The product is stable.
 

Physical and chemical properties of Sulfur

Common nameSULFUR

CAS Number   

 7704-34-9

DOT Number

UN 1350  (solid) 

UN 2448  (molten)

Flammability

Combustible

Flash Point

168 - 188o C 

Boiling Point

444 oC   

Melting Point

119 oC      

Specific Gravity

1.92 - 2.07 kg/L (Solid Sulfur)

1.811 kg/L (Molten Sulfur)                                    

Vapor Pressure

<0.001 mm Hg @ 20°C

0.11 mm Hg @140° C

Explosive limits, vol% in air

35-1400 g/m3

Auto ignition Temperature

190 - 220 ° C

pH

7 (Approximately)     

Solubility

Insoluble in the following materials: cold water, hot water. Soluble in carbon disulfide, benzene, toluene, chloroform, ether, warm aniline, carbon tetrachloride and liquid ammonia.