International Chemical Safety Cards MANGANESE OXIDE ICSC: 1398 Trimanganese tetraoxide Manganomanganic oxide Mn3O4 Molecular mass: 228.8 ICSC #    1398 CAS #     1317-35-7 RTECS # OP0895000 October 18, 2001 Validated 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 media. EXPLOSION EXPOSURE PREVENT DISPERSION OF DUST! AVOID EXPOSURE OF (PREGNANT) WOMEN!  •INHALATION Cough. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •EYES 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 SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Personal protection: P2 filter respirator for harmful particles. Sweep spilled substance into containers. Carefully collect remainder, then remove to safe place. SEE IMPORTANT INFORMATION ON BACK ICSC: 1398 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 MANGANESE OXIDE ICSC: 1398 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: BROWN TO BLACK CRYSTALLINE POWDER PHYSICAL DANGERS: CHEMICAL DANGERS: OCCUPATIONAL EXPOSURE LIMITS: TLV: as Mn 0.2 mg/m³ as TWA; (ACGIH 2006). MAK: as Mn (Inhalable fraction) 0.5 mg/m³; Pregnancy risk group: C; (DFG 2005). OSHA PEL†: C 5 mg/m3 NIOSH REL: See Appendix D NIOSH IDLH: N.D. See: IDLH INDEX ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its aerosol 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: May cause mechanical irritation. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The substance may have effects on the lungs and central nervous system , resulting in increased susceptibility to bronchitis, pneumonitis and neurologic, neuropsychiatric disorders (manganism). Animal tests show that this substance possibly causes toxicity to human reproduction or development. PHYSICAL PROPERTIES Melting point: 1564°C Density: 4.8 g/cm³ Solubility in water, g/100 ml: none ENVIRONMENTAL DATA N O T E S Depending on the degree of exposure, periodic medical examination is suggested. Occurs in nature as the mineral Hausmannite. ADDITIONAL INFORMATION ICSC: 1398 MANGANESE 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.