International Chemical Safety Cards 1-DODECANETHIOL ICSC: 0042 Dodecyl mercaptan Lauryl mercaptan C12H25SH Molecular mass: 202.4 ICSC #    0042 CAS #     112-55-0 RTECS # JR3155000 October 27, 2004 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. NO open flames. Powder, AFFF, foam, carbon dioxide. EXPLOSION Above 88°C explosive vapour/air mixtures may be formed. Above 88°C use a closed system, ventilation. EXPOSURE STRICT HYGIENE!  •INHALATION Cough. Headache. Nausea. Sore throat. Ventilation, 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 Nausea. Vomiting. Headache. Abdominal pain. Diarrhoea. Do not eat, drink, or smoke during work. Rinse mouth. Give plenty of water to drink. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Collect leaking and spilled liquid in sealable containers as far as possible. Carefully collect remainder. Personal protection: self-contained breathing apparatus. Separated from strong oxidants. R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 0042 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-DODECANETHIOL ICSC: 0042 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS TO PALE YELLOW LIQUID , WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on burning producing toxic gases . Reacts with strong oxidants. OCCUPATIONAL EXPOSURE LIMITS: TLV: (Inhalable fraction) 0.1 ppm as TWA; SEN; (ACGIH 2004). MAK not established. OSHA PEL: none NIOSH REL: C 0.5 ppm (4.1 mg/m3) 15-minute NIOSH IDLH: No data ROUTES OF EXPOSURE: INHALATION RISK: A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C. 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. PHYSICAL PROPERTIES Boiling point: 266-285°C Melting point: -7 - -9°C Relative density (water = 1): 0.85 Solubility in water: none Vapour pressure, kPa at 25°C: 0.33 Relative vapour density (air = 1): 7.0 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.02 Flash point: 88°C o.c. ENVIRONMENTAL DATA N O T E S Do NOT take working clothes home. Card has been partly updated in April 2005. See section Explosion. NFPA Code: H 2; F 1; R 0; ADDITIONAL INFORMATION ICSC: 0042 1-DODECANETHIOL (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.