International Chemical Safety Cards DIBUTYL PHOSPHATE ICSC: 1278 Dibutyl acid o-phosphate Dibutyl hydrogen phosphate Phosphoric acid dibutyl ester (CH3(CH2)3)2HPO4 / C8H19PO4 Molecular mass: 210.2 ICSC #    1278 CAS #     107-66-4 RTECS # TB9605000 March 25, 1998 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, AFFF, foam, carbon dioxide. EXPLOSION EXPOSURE PREVENT GENERATION OF MISTS!  •INHALATION Cough. Headache. Sore throat. Ventilation, local exhaust, or breathing protection. Fresh air, rest.  •SKIN Redness. Pain. Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •EYES Redness. Pain. Safety goggles, face shield. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Abdominal pain. Burning sensation. Sore throat. Do not eat, drink, or smoke during work. Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Collect leaking liquid in sealable containers. Cautiously neutralize spilled liquid. Then wash away with plenty of water. (Extra personal protection: filter respirator for organic gases and vapours). Separated from strong oxidants, strong bases. R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 1278 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 DIBUTYL PHOSPHATE ICSC: 1278 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS LIQUID. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating or on burning producing toxic and corrosive fumes including phosphoric acid. The substance is a medium strong acid. Reacts with strong oxidants. Attacks many metals forming flammable/explosive gas (hydrogen - see ICSC # 0001). OCCUPATIONAL EXPOSURE LIMITS: TLV: 1 ppm; 8.6 mg/m3 (as TWA); 2 ppm; 17 mg/m3 (STEL) (ACGIH 1997). OSHA PEL: TWA 1 ppm (5 mg/m3) NIOSH REL: TWA 1 ppm (5 mg/m3) ST 2 ppm (10 mg/m3) NIOSH IDLH: 30 ppm ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its aerosol. INHALATION RISK: A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C. EFFECTS OF SHORT-TERM EXPOSURE: The substance irritates the eyes, the skin and the respiratory tract. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Boiling point: 135-138°C Melting point: -13°C Relative density (water = 1): 1.06 Solubility in water, g/100 ml at 20°C: 1.8 Vapour pressure, kPa at 20°C: 0.13 Relative vapour density (air = 1): 7.2 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.01 Flash point: 188°C o.c. Auto-ignition temperature: 420°C Octanol/water partition coefficient as log Pow: 0.6-1.4 ENVIRONMENTAL DATA N O T E S ADDITIONAL INFORMATION ICSC: 1278 DIBUTYL PHOSPHATE (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.