International Chemical Safety Cards 1-OCTADECANETHIOL ICSC: 1622 Stearyl mercaptan n-Octadecyl mercaptan 1-Octadecyl mercaptan 1-Mercaptooctadecane n-Octadecanethiol C18H38S / CH3(CH2)17SH Molecular mass: 286.6 ICSC #    1622 CAS #     2885-00-9 April 05, 2006 Validated 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 EXPOSURE  •INHALATION Ventilation. Fresh air, rest.  •SKIN Protective gloves. Rinse and then wash skin with water and soap.  •EYES Redness. Safety spectacles First rinse with plenty of water (remove contact lenses if easily possible).  •INGESTION Headache. Nausea. Vomiting. Do not eat, drink, or smoke during work. Rinse mouth. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep or shovel up spilled substance and remove to safe place. Separated from strong oxidants, strong acids, bases and strong reducing agents. SEE IMPORTANT INFORMATION ON BACK ICSC: 1622 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 1-OCTADECANETHIOL ICSC: 1622 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: OILY, WHITE SOLID IN VARIOUS FORMS , WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: CHEMICAL DANGERS: Reacts violently with oxidants, reducing agents, strong acids and strong bases. The substance decomposes on heating producing toxic and corrosive fumes, including hydrogen sulfide and sulfur oxides. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK not established. ROUTES OF EXPOSURE: 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 EFFECTS OF SHORT-TERM EXPOSURE: The substance is mildly irritating to the eyes EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Boiling point (decomposes): 366°C Melting point: 24-31°C Relative density (water = 1): 0.85 Solubility in water: none Flash point: 185°C c.c. Octanol/water partition coefficient as log Pow: 9.12 (estimated) ENVIRONMENTAL DATA N O T E S Health effects of exposure to the substance have not been investigated adequately. Environmental effects from the substance have not been investigated adequately. ADDITIONAL INFORMATION ICSC: 1622 1-OCTADECANETHIOL (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.