International Chemical Safety Cards MANGANESE DIOXIDE ICSC: 0175 Manganese(IV)oxide Manganese peroxide MnO2 Molecular mass: 86.9 ICSC #    0175 CAS #     1313-13-9 RTECS # OP0350000 EC #         025-001-00-3 November 27, 2003 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Not combustible but enhances combustion of other substances. NO contact with combustibles. In case of fire in the surroundings: use appropriate extinguishing media. EXPLOSION EXPOSURE PREVENT DISPERSION OF DUST! AVOID EXPOSURE OF (PREGNANT) WOMEN!  •INHALATION Cough. Local exhaust or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN Protective gloves. Rinse and then wash skin with water and soap.  •EYES Safety goggles, or eye protection in combination with breathing protection if powder. 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 containers; if appropriate, moisten first to prevent dusting. Do NOT absorb in saw-dust or other combustible absorbents. Do NOT let this chemical enter the environment. (Extra personal protection: P2 filter respirator for harmful particles.) Separated from combustible and reducing substances. Xn symbol R: 20/22 S: 2-25 SEE IMPORTANT INFORMATION ON BACK ICSC: 0175 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 DIOXIDE ICSC: 0175 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: BLACK TO BROWN POWDER PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating above 553°C producing manganese(III)oxide and oxygen , which increases fire hazard. The substance is a strong oxidant and reacts violently with combustible and reducing materials causing fire and explosion hazard. Reacts violently with aluminium on heating. OCCUPATIONAL EXPOSURE LIMITS: TLV: (as manganese) 0.2 mg/m³ as TWA; Intended change; (ACGIH 2003). MAK: 0.5 I mg/m³; Pregnancy risk group: C; (DFG 2003). 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: The aerosol is irritating to the respiratory tract. 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 (decomposes): 553°C Density: 5.0 g/cm3 Solubility in water: none ENVIRONMENTAL DATA This substance may be hazardous in the environment; special attention should be given to aquatic organisms. N O T E S Depending on the degree of exposure, periodic medical examination is suggested. ADDITIONAL INFORMATION ICSC: 0175 MANGANESE DIOXIDE (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.