International Chemical Safety Cards 1-DODECANETHIOL ICSC: 0042 1-DODECANETHIOL Dodecyl mercaptan Lauryl mercaptan C12H25SH Molecular mass: 202.4 CAS # 112-55-0 RTECS # JR3155000 ICSC # 0042 UN # 1228 TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. NO open flames. Powder, AFFF, foam, carbon dioxide. EXPLOSION Above 82°C explosive vapour/air mixtures may be formed. Above 82°C use a closed system, ventilation.   EXPOSURE STRICT HYGIENE! INHALATION Confusion. Cough. Dizziness. Headache. Nausea. Shortness of breath. Sore throat. Unconsciousness. Weakness. 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. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor. INGESTION Abdominal pain. Dullness. Headache. Nausea. Unconsciousness. 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 Evacuate danger area! Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Carefully collect remainder (extra personal protection: self-contained breathing apparatus). Separated from strong oxidants, alkali metals. UN Hazard Class: 3 UN Subsidiary Risks: 6.1 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 © IPCS CEC 1993

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 highly toxic gases including sulfur dioxide (see ICSC # 0074). Reacts violently with strong oxidants and alkali metals. OCCUPATIONAL EXPOSURE LIMITS (OELs): TLV not established. MAK not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its vapour and by ingestion. 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. The substance may cause effects on the central nervous system , resulting in respiratory failure. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact with skin may cause dermatitis. Repeated or prolonged contact may cause skin sensitization. PHYSICAL PROPERTIES Boiling point: 227 to 248°C Melting point: -45; -7°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: 82°C o.c. Auto-ignition temperature: 230°C Explosive limits, vol% in air: see Notes

ENVIRONMENTAL DATA
N O T E S
Explosive limits are unknown in literature, although the substance is combustible and has a flash point 55°C. 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. Transport Emergency Card: TEC (R)-61G06b NFPA Code: H 2; F 1; R 0;

ADDITIONAL INFORMATION
ICSC: 0042 1-DODECANETHIOL © IPCS, CEC, 1993

IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of 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.