International Chemical Safety Cards p-(METHYLAMINO)PHENOL SULFATE ICSC: 1528 bis(4-Hydroxy-N-methylanilinium) sulfate Metol 4-(Methylamino)phenol sulfate (C7H9NO)2•H2SO4 Molecular mass: 344.4 ICSC #    1528 CAS #     55-55-0 RTECS # SL8650000 UN #        3077 EC #         650-031-00-4 April 22, 2004 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, alcohol-resistant foam, water spray, carbon dioxide. EXPLOSION Finely dispersed particles form explosive mixtures in air. Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting. EXPOSURE PREVENT DISPERSION OF DUST! AVOID ALL CONTACT!  •INHALATION Cough. Sore throat. Local exhaust or breathing protection. Fresh air, rest. Refer for medical attention.  •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. 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. Give plenty of water to drink. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Do NOT let this chemical enter the environment. Sweep spilled substance into covered containers; if appropriate, moisten first to prevent dusting. Personal protection: P2 filter respirator for harmful particles. Separated from incompatible materials . See Chemical Dangers. Xn symbol N symbol R: 22-43-48/22-50/53 S: 2-36/37-46-60-61 UN Hazard Class: 9 UN Packing Group: III SEE IMPORTANT INFORMATION ON BACK ICSC: 1528 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 p-(METHYLAMINO)PHENOL SULFATE ICSC: 1528 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: WHITE CRYSTALS . PHYSICAL DANGERS: Dust explosion possible if in powder or granular form, mixed with air. CHEMICAL DANGERS: The substance decomposes on heating producing toxic fumes including nitrogen oxides and sulfur oxides . Reacts with acids , acid anhydrides , acid chlorides and oxidants . OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by ingestion. INHALATION RISK: No indication can be given whether a harmful concentration in the air will be reached. EFFECTS OF SHORT-TERM EXPOSURE: The substance is mildly irritating to the skin , and is irritating to the eyes and the respiratory tract . EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the blood , resulting in lesions of blood cells. PHYSICAL PROPERTIES Melting point (decomposes): 260°C Solubility in water, g/100 ml at 15°C: 4.7 Auto-ignition temperature: 531°C ENVIRONMENTAL DATA The substance is very toxic to aquatic organisms. N O T E S Health effects of exposure to the substance have not been investigated adequately. Transport Emergency Card: TEC (R)-90GM7-III ADDITIONAL INFORMATION ICSC: 1528 p-(METHYLAMINO)PHENOL 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.