International Chemical Safety Cards COBALT SULFIDE ICSC: 1529 Cobalt monosulfide Cobalt(II) sulfide CoS Molecular mass: 91.0 ICSC #    1529 CAS #     1317-42-6 RTECS # GG3325000 EC #         027-003-00-X April 22, 2004 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire. In case of fire in the surroundings: use appropriate extinguishing agent . EXPLOSION EXPOSURE PREVENT DISPERSION OF DUST! STRICT HYGIENE!  •INHALATION Cough. Sore throat. Shortness of breath. Wheezing. Local exhaust or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN Redness. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse skin with plenty of water or shower.  •EYES Redness. Pain. Safety goggles, or eye protection in combination with breathing protection. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Abdominal pain. Nausea. Vomiting. Do not eat, drink, or smoke during work. Rinse mouth. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into covered containers; if appropriate, moisten first to prevent dusting. Personal protection: P3 filter respirator for toxic particles. Separated from strong oxidants. Xi symbol N symbol R: 43-50/53 S: 2-24-37-60-61 SEE IMPORTANT INFORMATION ON BACK ICSC: 1529 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

International Chemical Safety Cards COBALT SULFIDE ICSC: 1529 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: GREY POWDER OR REDDISH-SILVERY CRYSTALS. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating producing toxic gases and irritating fumes including hydrogen sulfide and sulfur oxides . Reacts with strong oxidants. OCCUPATIONAL EXPOSURE LIMITS: TLV: (as cobalt) 0.02 mg/m³ as TWA; A3; BEI issued; (ACGIH 2004). MAK: (inhalable fraction) Sah; Carcinogen category: 2; Germ cell mutagen group: 3A; (DFG 2003). ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation . INHALATION RISK: A harmful concentration of airborne particles can be reached quickly when dispersed, especially if powdered. EFFECTS OF SHORT-TERM EXPOSURE: May cause mechanical irritation. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact may cause skin sensitization. Repeated or prolonged inhalation exposure may cause asthma. PHYSICAL PROPERTIES Melting point: >1116°C Density: 5.5 g/cm3 Solubility in water: none ENVIRONMENTAL DATA N O T E S Depending on the degree of exposure, periodic medical examination is indicated. Do NOT take working clothes home. Anyone who has shown symptoms of asthma due to this substance should avoid all further contact. The symptoms of asthma often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. ADDITIONAL INFORMATION ICSC: 1529 COBALT SULFIDE (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.