International Chemical Safety Cards LEAD(II) OXIDE ICSC: 0288 LEAD(II) OXIDE Lead monoxide Plumbous oxide Lead protoxide PbO Molecular mass: 223.2 CAS # 1317-36-8 RTECS # OG1750000 ICSC # 0288 UN # 3288 EC # 082-001-00-6 (lead compounds) 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: all extinguishing agents allowed. EXPLOSION EXPOSURE PREVENT DISPERSION OF DUST! STRICT HYGIENE! INHALATION Local exhaust or breathing protection. Fresh air, rest. SKIN Protective gloves. EYES Safety spectacles. 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. Rinse mouth. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place (extra personal protection: P3 filter respirator for toxic particles). Separated from strong oxidants, aluminium, sodium, food and feedstuffs. Do not transport with food and feedstuffs. T symbol R: 61-20/22-33 S: 53-45 Note: A; Note: E UN Hazard Class: 6.1 SEE IMPORTANT INFORMATION ON BACK ICSC: 0288 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993 No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and IDLH values.

International Chemical Safety Cards LEAD(II) OXIDE ICSC: 0288 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: RED TO REDDISH-YELLOW CRYSTALS (see Notes). PHYSICAL DANGERS: CHEMICAL DANGERS: Reacts violently with strong oxidants, aluminium powder and sodium. Upon heating, toxic fumes of lead compounds are formed. OCCUPATIONAL EXPOSURE LIMITS (OELs): TLV (as Pb): ppm; 0.15 mg/m3 as TWA (ACGIH 1992-1993). ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation and by ingestion. INHALATION RISK: Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on spraying or when dispersed, especially if powdered. EFFECTS OF SHORT-TERM EXPOSURE: EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The substance may have effects on the central nervous system, kidneys and blood , resulting in anaemia and impaired functions. Does cause serious reproductive toxicity in humans. PHYSICAL PROPERTIES Melting point: 888°C Relative density (water = 1): 9.5 Solubility in water, g/100 ml: none ENVIRONMENTAL DATA N O T E S The substance exists in two forms: at ordinary temperatures red to reddish-yellow crystals and yellow crystals stable above 489°C. Litharge, massicot are other names of lead(II) oxide. Also consult ICSC # 0052 (Lead). Transport Emergency Card: TEC (R)-61G11b ADDITIONAL INFORMATION ICSC: 0288 LEAD(II) OXIDE © IPCS, CEC, 1993

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 IDLH values.