International Chemical Safety Cards BARIUM SULFATE ICSC: 0827 Barium sulphate Blanc fixe Artificial barite BaSO4 Molecular mass: 233.43 ICSC #    0827 CAS #     7727-43-7 RTECS # CR0600000 October 20, 1999 Peer reviewed 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!  •INHALATION Local exhaust or breathing protection. Fresh air, rest.  •SKIN Protective gloves. Remove contaminated clothes. Rinse skin with plenty of water or shower.  •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. (Extra personal protection: P1 filter respirator for inert particles). R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 0827 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 BARIUM SULFATE ICSC: 0827 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: ODOURLESS, TASTELESS, WHITE OR YELLOWISH CRYSTALS OR POWDER. PHYSICAL DANGERS: CHEMICAL DANGERS: Reacts violently with aluminium powder. OCCUPATIONAL EXPOSURE LIMITS: TLV: 10 mg/m3 (ACGIH 1999). OSHA PEL: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp) NIOSH REL: TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp) NIOSH IDLH: No data ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its aerosol. INHALATION RISK: Evaporation at 20°C is negligible; a nuisance-causing concentration of airborne particles can, however, be reached quickly. EFFECTS OF SHORT-TERM EXPOSURE: EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Lungs may be affected by repeated or prolonged exposure to dust particles , resulting in baritosis (a form of benign pneumoconiosis). PHYSICAL PROPERTIES Melting point (decomposes): 1600°C Density: 4.5 g/cm3 Solubility in water: none ENVIRONMENTAL DATA N O T E S Occurs in nature as the mineral barite; also as barytes, heavy spar. ADDITIONAL INFORMATION ICSC: 0827 BARIUM SULFATE (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.