1-Octanethiol
1-Mercaptooctane
1-Octylthiol
C8H18S / CH2SH(CH2)6CH3
Molecular mass: 146.3
ICSC # 1493
CAS # 111-88-6
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Combustible.
Gives off irritating or toxic fumes (or gases) in a fire.
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NO open flames.
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Powder, carbon dioxide
,
foam
.
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Explosion
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Above 69°C explosive vapour/air mixtures may be formed.
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Above 69°C use a closed system, ventilation.
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Exposure
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•Inhalation
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Cough.
Sore throat.
Headache.
Nausea.
Vomiting.
Dizziness.
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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Redness.
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Protective gloves.
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Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
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Safety spectacles.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Headache.
Nausea.
Vomiting.
Dizziness.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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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.
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Fireproof.
Separated from
strong bases,
strong acids
and
oxidants
.
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Important Data
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Physical State; Appearance:
COLOURLESS LIQUID
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
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.
OSHA PEL: none
NIOSH REL: C 0.5 ppm (3.0 mg/m3) 15-minute
NIOSH IDLH: N.D. See: IDLH INDEX
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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 20°C.
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.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Boiling point: 199°C
Melting point: -49°C
Relative density (water = 1): 0.84
Solubility in water: none
Vapour pressure, kPa at 25°C: 0.06
Relative vapour density (air = 1): 5.0
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Relative density of the vapour/air-mixture at 20°C (air = 1): 1
Flash point:
69°C o.c.
Explosive limits, vol% in air: 0.8-?
Octanol/water partition coefficient as log Pow: 4.21 (estimated)
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Environmental
Data
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The substance is very toxic to aquatic organisms.
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N O T E S
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ADDITIONAL INFORMATION
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ICSC: 1493
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n-OCTYL MERCAPTAN
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(C) IPCS, CEC, 1994
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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.
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