International Chemical Safety Cards COPPER (I) OXIDE ICSC: 0421 Dicopper oxide Cuprous oxide Red copper oxide Cu2O Molecular mass: 143.1 ICSC #    0421 CAS #     1317-39-1 RTECS # GL8050000 EC #         029-002-00-X April 09, 1997 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Not combustible. In case of fire in the surroundings: all extinguishing agents allowed. EXPLOSION EXPOSURE PREVENT DISPERSION OF DUST! STRICT HYGIENE!  •INHALATION Cough. Sore throat. Metal fume fever. Metallic taste. See Notes. Local exhaust or breathing protection. Fresh air, rest.  •SKIN Dry skin. 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. Diarrhoea. Nausea. Vomiting. Metallic taste. Do not eat, drink, or smoke during work. Rinse mouth. Give plenty of water to drink. Refer for medical attention. 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: P2 filter respirator for harmful particles). Xn symbol R: 22 S: 2-22 SEE IMPORTANT INFORMATION ON BACK ICSC: 0421 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 COPPER (I) OXIDE ICSC: 0421 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: YELLOW, RED OR BROWN CRYSTALLINE POWDER. PHYSICAL DANGERS: CHEMICAL DANGERS: OCCUPATIONAL EXPOSURE LIMITS: TLV (as Cu, dust and mists): 1 mg/m3; (as Cu, fume): 0.2 mg/m3 (ACGIH 1996). MAK as Cu: 1 mg/m3 (1996). 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 when dispersed. EFFECTS OF SHORT-TERM EXPOSURE: The substance irritates the eyes and the respiratory tract. Inhalation of fumes may cause metal fume fever. The substance may cause effects on the kidneys and liver after ingestion. The effects may be delayed. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact with skin may cause dermatitis. PHYSICAL PROPERTIES Decomposes below boiling point at 1800°C Melting point: 1232°C Relative density (water = 1): 6.0 Solubility in water: none ENVIRONMENTAL DATA N O T E S Headache, cough, sweating, nausea and fever may be caused by freshly formed fumes or dust of copper oxide. The symptoms of metal fume fever do not become manifest until 4-12 hours after exposure. C.I. 77402, Copox, Copper Nordox, Copper Sardex, Perenox, Yellow Cuprocide are trade names. Transport Emergency Card: TEC (R)-61G11c ADDITIONAL INFORMATION ICSC: 0421 COPPER (I) 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.