International Chemical Safety Cards ANTIMONY TRIOXIDE ICSC: 0012 Antimony sesquioxide Antimony(III) oxide Antimony white Flowers of antimony Sb2O3 Molecular mass: 291.5 ICSC #    0012 CAS #     1309-64-4 RTECS # CC5650000 UN #        1549 (see Notes) EC #         051-005-00-X May 09, 2003 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: use appropriate extinguishing media. EXPLOSION EXPOSURE PREVENT DISPERSION OF DUST! STRICT HYGIENE! AVOID EXPOSURE OF (PREGNANT) WOMEN!  •INHALATION Cough. Headache. Nausea. Sore throat. Vomiting. Local exhaust or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN Redness. Pain. Blisters. Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.  •EYES Redness. Pain. 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. Diarrhoea. Sore throat. Vomiting. Burning sensation in the stomach (further see Inhalation). Do not eat, drink, or smoke during work. Rinse mouth. Rest. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Do NOT let this chemical enter the environment. (Extra personal protection: P2 filter respirator for harmful particles.) Separated from food and feedstuffs . Do not transport with food and feedstuffs. Xn symbol R: 40 S: 2-22-36/37 SEE IMPORTANT INFORMATION ON BACK ICSC: 0012 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 ANTIMONY TRIOXIDE ICSC: 0012 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: WHITE CRYSTALLINE POWDER. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating producing toxic fumes . Reacts under certain circumstances with hydrogen, producing a very poisonous gas (stibine). OCCUPATIONAL EXPOSURE LIMITS: TLV: (as Sb) 0.5 mg/m³ (ACGIH 2003). TLV: Antimony trioxide (production) A2 (ACGIH 2003). MAK: Carcinogen category: 2 (DFG 2002). ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation. INHALATION RISK: A harmful concentration of airborne particles can be reached quickly when dispersed. EFFECTS OF SHORT-TERM EXPOSURE: The substance is irritating to the eyes , the skin and the respiratory tract . EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact with skin may cause dermatitis. Lungs may be affected by repeated or prolonged exposure to the dust of this substance. Tumours have been detected in experimental animals but may not be relevant to humans. Animal tests show that this substance possibly causes toxicity to human reproduction or development. PHYSICAL PROPERTIES Boiling point: (partially sublimes) 1550°C Melting point: (see Notes) 656°C Density: 5.2/5.7 g/cm³ (see Notes) Solubility in water, g/100 ml at 30°C: 0.0014 (none) Vapour pressure, Pa at 574°C: 130 ENVIRONMENTAL DATA The substance is very toxic to aquatic organisms. Bioaccumulation of this chemical may occur in crustacea. It is strongly advised that this substance does not enter the environment. N O T E S Melting point established under the absence of oxygen. Density differs with crystalline structure. Depending on the degree of exposure, periodic medical examination is indicated. The recommendations on this card do not apply to vapour exposure during the production. The technical product may contain impurities which alter the health effects; for further information see ICSC 0013 Arsenic. UN regulation: the special provision SP45 is applicable to the UN number 1549 (Hazard class 6.1 and packaging group III). It means that antimony sulfides and oxides which contain not more than 0.5 % of arsenic calculated on the total weight are not subject to these regulations. Transport Emergency Card: TEC (R)-61GT5-III ADDITIONAL INFORMATION ICSC: 0012 ANTIMONY TRIOXIDE (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.