International Chemical Safety Cards HEXAHYDRO-4-METHYLPHTHALIC ANHYDRIDE ICSC: 1376 Hexahydro-5-methyl-1,3-isobenzofurandione 4-Methylcyclohexane-1,2-dicarboxylic acid anhydride Methylhexahydrophthalic anhydride MHHPA C9H12O3 / CH3C6H9(CO)2O Molecular mass: 168.2 ICSC #    1376 CAS #     19438-60-9 RTECS # EC #         607-241-00-6 March 14, 2001 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. NO open flames. Powder, water spray, foam, carbon dioxide. EXPLOSION EXPOSURE PREVENT GENERATION OF MISTS!  •INHALATION Cough. Sore throat. Wheezing. Shortness of breath. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Half-upright position. Refer for medical attention.  •SKIN Redness. Burning sensation. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse skin with plenty of water or shower.  •EYES Redness. Pain. Blurred vision. 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 Burning sensation. Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Do NOT induce vomiting. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place. (Extra personal protection: P2 filter respirator for harmful particles.) Dry. Well closed. Note: C Xn symbol R: 41-42/43 S: 2-22-24-26-37/39 SEE IMPORTANT INFORMATION ON BACK ICSC: 1376 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 HEXAHYDRO-4-METHYLPHTHALIC ANHYDRIDE ICSC: 1376 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: OILY COLOURLESS LIQUID PHYSICAL DANGERS: CHEMICAL DANGERS: Reacts with water to produce acid . OCCUPATIONAL EXPOSURE LIMITS: TLV not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its aerosol. INHALATION RISK: A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20°C; on spraying or dispersing, however, much faster. 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. Repeated or prolonged inhalation exposure may cause asthma. PHYSICAL PROPERTIES Melting point: -29°C Relative density (water = 1): 1.16 Solubility in water: reaction Flash point: 350°C ENVIRONMENTAL DATA N O T E S The symptoms of asthma often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. Anyone who has shown symptoms of asthma due to this substance should avoid all further contact with this substance. ADDITIONAL INFORMATION ICSC: 1376 HEXAHYDRO-4-METHYLPHTHALIC ANHYDRIDE (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.