International Chemical Safety Cards COBALT (III) OXIDE ICSC: 0785 Dicobalt trioxide Cobalt sesquioxide Cobalt trioxide Cobaltic oxide Co2O3 Molecular mass: 165.9 ICSC #    0785 CAS #     1308-04-9 RTECS # GG2900000 April 22, 2004 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Not combustible. In case of fire in the surroundings: use appropriate extinguishing media. 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 Protective gloves. Protective clothing. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •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. 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. Carefully collect remainder, then remove to safe place. Personal protection: P2 filter respirator for harmful particles. Separated from reducing agents and hydrogen peroxide. R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 0785 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 (III) OXIDE ICSC: 0785 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: BLACK-GREY CRYSTALLINE POWDER . PHYSICAL DANGERS: CHEMICAL DANGERS: Reacts violently with hydrogen peroxide. Reacts with reducing agents . OCCUPATIONAL EXPOSURE LIMITS: TLV: (as Co) 0.02 mg/m³ as TWA; A3; BEI issued; (ACGIH 2004). MAK not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. INHALATION RISK: A harmful concentration of airborne particles can be reached quickly when dispersed. 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. This specific compound has not been studied for carcinogenicity, but data from similar cobalt compounds indicate that it should be considered as being possibly carcinogenic to humans. PHYSICAL PROPERTIES Melting point (decomposes): 895°C Density: 5.2 g/cm3 Solubility in water: none ENVIRONMENTAL DATA N O T E S Depending on the degree of exposure, periodic medical examination is suggested. Anyone who has shown symptoms of asthma due to this substance should avoid all further contact with this substance. ADDITIONAL INFORMATION ICSC: 0785 COBALT (III) OXIDE (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.