SULFUR ICSC: 1166 Flowers of sulfur Flour sulfur Brimstone S or S8 Molecular mass: 256.5 (S8); Atomic mass 32.1 ICSC #    1166 CAS #     7704-34-9 RTECS # WS4250000 UN #        1350 Types of Hazard/ Exposure Acute Hazards/ Symptoms Prevention First Aid/ Fire Fighting FIRE Combustible. NO open flames, NO sparks, and NO smoking. Water spray. Foam. Powder. Dry sand. Explosion Finely dispersed particles form explosive mixtures in air. Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding). In case of fire: keep drums, etc., cool by spraying with water. Exposure PREVENT DISPERSION OF DUST!  •Inhalation Burning sensation. Cough. Sore throat. Local exhaust or breathing protection. Fresh air, rest. Half-upright position. Refer for medical attention.  •Skin Redness. Protective gloves. Remove contaminated clothes. Rinse skin with plenty of water or shower.  •Eyes Redness. Pain. Blurred vision. Safety goggles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •Ingestion Burning sensation. Diarrhoea. Do not eat, drink, or smoke during work. Rinse mouth. Refer for medical attention. Spillage Disposal Storage Packaging & Labelling Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. (Extra personal protection: P2 filter respirator for harmful particles). Fireproof. Separated from strong oxidants. UN Hazard Class: 4.1 UN Packing Group: III SULFUR ICSC: 1166 Important Data Physical State; Appearance: YELLOW SOLID IN VARIOUS FORMS Physical Dangers: 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. Chemical Dangers: On combustion, forms toxic and corrosive gases of sulfur oxidesincluding sulfur dioxide (see ICSC 0074). Reacts violently with strong oxidants causing fire and explosion hazard, especially if powdered. Occupational Exposure Limits: TLV not established. Routes of Exposure: The substance can be absorbed into the body by inhalation and by ingestion. Inhalation Risk: Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed . Effects of Short-Term Exposure: The substance irritates the eyes, the skin and the respiratory tract. Inhalation of powder of this substance may cause inflammation of the nose and the respiratory tract. Effects of Long-Term or Repeated Exposure: Repeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the respiratory tract , resulting in chronic bronchitis. Physical Properties Boiling point: 445°C Melting point: (r-sulfur) 107°C Melting point: (beta-sulfur) 115°C Melting point: (amorphous) 120)°C Density: 2.1 g/cm3 Solubility in water: none Flash point: 160°C c.c. Auto-ignition temperature: 232°C Explosive limits, vol% in air: 35-1400 g/m3 Environmental Data N O T E S Often transported in molten state (UN 2448; TEC(R)-115). Molten sulfur reacts with hydrocarbons to form toxic and flammable gases. Depending on the degree of exposure, periodic medical examination is indicated. Transport Emergency Card: TEC (R)-115A NFPA Code: H 1; F 1; R 0 ADDITIONAL INFORMATION ICSC: 1166 SULFUR (C) IPCS, CEC, 1994 IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.