International Chemical Safety Cards PYROGALLIC ACID ICSC: 0770 1,2,3-Benzenetriol 1,2,3-Trihydroxybenzene Pyrogallol C6H6O3 / C6H3(OH)3 Molecular mass: 126.1 ICSC #    0770 CAS #     87-66-1 RTECS # UX2800000 EC #         604-009-00-6 March 28, 1996 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. NO open flames. Powder, alcohol-resistant foam, water spray, carbon dioxide. EXPLOSION EXPOSURE PREVENT DISPERSION OF DUST! STRICT HYGIENE!  •INHALATION Cough. Sore throat. Local exhaust or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN Redness. Pain. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse skin with plenty of water or shower.  •EYES Redness. Pain. Safety spectacles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Diarrhoea. Vomiting. Weakness. Hypothermia. Fine temors. Muscular incoordination. Loss of reflexes. Coma. Asphysia. Do not eat, drink, or smoke during work. Rinse mouth. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Personal protection: P2 filter respirator for harmful particles. Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Do NOT let this chemical enter the environment. Separated from oxidants , bases . Xn symbol R: 20/21/22-68-52/53 S: 2-36/37-61 SEE IMPORTANT INFORMATION ON BACK ICSC: 0770 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 PYROGALLIC ACID ICSC: 0770 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: WHITE CRYSTALLINE POWDER , TURNS GREY ON EXPOSURE TO LIGHT AND AIR. PHYSICAL DANGERS: CHEMICAL DANGERS: The solution in water is a weak acid. Reacts with oxidants and bases . OCCUPATIONAL EXPOSURE LIMITS: TLV not established. 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. 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 may cause skin sensitization. May cause genetic damage in humans. PHYSICAL PROPERTIES Boiling point: 309°C Melting point: 131-134°C Density: 1.45 g/cm3 Solubility in water: good (60 g/100 ml at 20°C) Vapour pressure, kPa at 168°C: 1.33 ENVIRONMENTAL DATA The substance is harmful to aquatic organisms. N O T E S ADDITIONAL INFORMATION ICSC: 0770 PYROGALLIC ACID (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.