International Chemical Safety Cards FERRIC OXIDE ICSC: 1577 Anhydrous ferric oxide Iron (III) oxide Diiron trioxide Iron trioxide Ferric sesquioxide Fe2O3 Molecular mass: 159.7 ICSC #    1577 CAS #     1309-37-1 RTECS # NO7400000 UN #        See Notes October 28, 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  •INHALATION Cough. Avoid inhalation of dust . Fresh air, rest.  •SKIN  •EYES Redness. Safety goggles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Do not eat, drink, or smoke during work. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Personal protection: P1 filter respirator for inert particles. Sweep spilled substance into covered containers. R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 1577 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 FERRIC OXIDE ICSC: 1577 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: REDDISH BROWNTO BLACK CRYSTALS OR POWDER PHYSICAL DANGERS: CHEMICAL DANGERS: Reacts with carbon monoxide causing explosion hazard. OCCUPATIONAL EXPOSURE LIMITS: TLV: (as Fe) 5 mg/m³ as TWA; A4; (ACGIH 2004). MAK: (as the respirable fraction of the aerosol) 1.5 mg/m³; (DFG 2004). ROUTES OF EXPOSURE: INHALATION RISK: A nuisance-causing 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: Lungs may be affected by repeated or prolonged exposure to dust particles , resulting in siderosis, a benign condition. PHYSICAL PROPERTIES Melting point: 1565°C Density: 5.24 g/cm3 Solubility in water: none ENVIRONMENTAL DATA N O T E S There is a UN number associated with ferric oxide but this relates to iron oxide, spent, or iron sponge, spent obtained from coal gas purification which is spontaneously combustible. ADDITIONAL INFORMATION ICSC: 1577 FERRIC 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.