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n-OCTYL MERCAPTAN ICSC: 1493
Date of Peer Review: November 2003

1-Octanethiol
1-Mercaptooctane
1-Octylthiol
CAS # 111-88-6 C8H18S / CH2SH(CH2)6CH3
RTECS # Molecular mass: 146.3
UN #
EC #
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, carbon dioxide, foam.
EXPLOSION Above 69C explosive vapour/air mixtures may be formed.
Above 69C use a closed system, ventilation.

EXPOSURE


Inhalation Cough. Sore throat. Headache. Nausea. Vomiting. Dizziness.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Refer for medical attention.
Skin Redness.
Protective gloves.
Rinse and then wash skin with water and soap.
Eyes Redness.
Safety spectacles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Headache. Nausea. Vomiting. Dizziness.
Do not eat, drink, or smoke during work.
Rinse mouth. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
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. (Extra personal protection: filter respirator for organic gases and vapours.) Do NOT let this chemical enter the environment.
EU Classification
UN Classification

EMERGENCY RESPONSE STORAGE
NFPA Code: H2; F2; R1;
Fireproof. Separated from strong bases, strong acids and oxidants.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 1999

SEE IMPORTANT INFORMATION ON BACK


n-OCTYL MERCAPTAN ICSC: 1493
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID, WITH CHARACTERISTIC ODOUR.

CHEMICAL DANGERS:
The substance decomposes on burning producing toxic gases including hydrogen sulfide and sulfur oxides. Reacts violently with oxidants causing fire hazard. Reacts with strong acids, strong bases and strong reducing agents. Attacks metal and rubber.

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established. MAK not established.
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation 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 20C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is mildly irritating to the eyes, the skin and the respiratory tract. The substance may cause effects on the central nervous system. Exposure at high levels may result in lowering of consciousness.

PHYSICAL PROPERTIES
Boiling point: 199C
Melting point: -49C
Relative density (water = 1): 0.84
Solubility in water: none
Vapour pressure, kPa at 25C: 0.06
Relative vapour density (air = 1): 5.0
Relative density of the vapour/air-mixture at 20C (air = 1): 1
Flash point: 69C o.c.
Explosive limits, vol% in air: 0.8-?
Octanol/water partition coefficient as log Pow: 4.21 (estimated)
ENVIRONMENTAL DATA
The substance is very toxic to aquatic organisms.
NOTES

ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor 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
IPCS, CEC 1999
See Also:
        Octyl tert-, mercaptan (ICSC)