International Chemical Safety Cards SULFANILIC ACID ICSC: 0569 4-Aminobenzenesulfonic acid Aniline-4-sulfonic acid C6H7NO3S Molecular mass: 173.2 ICSC #    0569 CAS #     121-57-3 RTECS # WP3895500 EC #         612-014-00-X April 20, 2005 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire. NO open flames. Powder, water spray, foam, carbon dioxide. EXPLOSION EXPOSURE PREVENT DISPERSION OF DUST!  •INHALATION Local exhaust or breathing protection. Fresh air, rest.  •SKIN Redness. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse skin with plenty of water or shower.  •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 Do not eat, drink, or smoke during work. Rinse mouth. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Personal protection: P2 filter respirator for harmful particles. Do NOT let this chemical enter the environment. Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting. Wash away remainder with plenty of water. Separated from strong acids, strong bases. Xi symbol R: 36/38-43 S: 2-24-37 SEE IMPORTANT INFORMATION ON BACK ICSC: 0569 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 SULFANILIC ACID ICSC: 0569 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: WHITE POWDER OR WHITE TO GREY CRYSTALS PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating around 290°C, on burning and on contact with strong acids producing toxic fumes including nitrogen oxides and sulfur oxides . Reacts violently with strong bases . OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK not established. ROUTES OF EXPOSURE: INHALATION RISK: A harmful concentration of airborne particles can be reached quickly when dispersed, especially if powdered. EFFECTS OF SHORT-TERM EXPOSURE: The substance is irritating to the eyes . The substance is mildly irritating to the skin . EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact may cause skin sensitization. PHYSICAL PROPERTIES Melting point (decomposes): 288°C Density: 1.49 g/cm3 Solubility in water: poor Octanol/water partition coefficient as log Pow: -0.9 ENVIRONMENTAL DATA The substance is harmful to aquatic organisms. N O T E S At room temperature this substance is in the form of monohydrate. It becomes anhydrous around 100°C. ADDITIONAL INFORMATION ICSC: 0569 SULFANILIC 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.