International Chemical Safety Cards OCTAMETHYLCYCLOTETRASILOXANE ICSC: 0310 Cyclotetrasiloxane, octamethyl- C8H24O4Si4 Molecular mass: 296.6 ICSC #    0310 CAS #     556-67-2 RTECS # GZ4397000 EC #         014-018-00-1 October 09, 2002 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Flammable. NO open flames. Powder, alcohol-resistant foam, water in large amounts, carbon dioxide. EXPLOSION EXPOSURE PREVENT GENERATION OF MISTS!  •INHALATION Ventilation. Fresh air, rest.  •SKIN Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •EYES Safety spectacles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Nausea. Vomiting. Do not eat, drink, or smoke during work. Rinse mouth. Do NOT induce vomiting. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Collect leaking liquid in covered containers. Xn symbol R: 53-62 S: 2-36/37-46-51-61 SEE IMPORTANT INFORMATION ON BACK ICSC: 0310 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 OCTAMETHYLCYCLOTETRASILOXANE ICSC: 0310 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: OILY COLOURLESS LIQUID. PHYSICAL DANGERS: CHEMICAL DANGERS: OCCUPATIONAL EXPOSURE LIMITS: TLV not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its vapour, through the skin and by ingestion. INHALATION RISK: No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20°C. EFFECTS OF SHORT-TERM EXPOSURE: EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Boiling point: 175°C Melting point: 17.5°C Relative density (water = 1): 0.96 Solubility in water: none Vapour pressure, Pa at 21.7°C: 133.3 Flash point: 56°C ENVIRONMENTAL DATA N O T E S ADDITIONAL INFORMATION ICSC: 0310 OCTAMETHYLCYCLOTETRASILOXANE (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.