n-Heptylthiol
n-Thioheptyl alcohol
1-Mercaptoheptane
Heptyl mercaptan
C7H16S / CH3(CH2)6SH
Molecular mass: 132.3
ICSC # 1619
CAS # 1639-09-4
RTECS # MJ1400000
UN # 3336
Ma, tatements based on analogy with hexanethiol (ICSC 1523) and octanethiol (ICSC 1493).
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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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Flammable.
Gives off irritating or toxic fumes (or gases) in a fire.
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NO open flames, NO sparks, and NO smoking.
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Powder, alcohol-resistant foam, water spray, carbon dioxide.
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Explosion
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Above 46°C explosive vapour/air mixtures may be formed.
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Above 46°C use a closed system, ventilation, and explosion-proof electrical equipment.
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Exposure
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•Inhalation
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Dizziness.
Drowsiness.
Headache.
Nausea.
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
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•Skin
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Redness.
Pain.
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Protective gloves.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
Pain.
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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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(see Inhalation).
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Do not eat, drink, or smoke during work.
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Do NOT induce vomiting.
Give one or two glasses of water to drink.
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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Remove all ignition sources.
Personal protection:
filter respirator for organic gases and vapours.
Collect leaking liquid in sealable containers.
Absorb remaining liquid in sand or inert absorbent and remove to safe place.
Do NOT wash away into sewer.
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Fireproof.
Separated from
strong oxidants,
strong bases,
strong acids.
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UN Hazard Class: 3
UN Packing Group: III
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Important Data
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Physical State; Appearance:
COLOURLESS LIQUID
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
The vapour is heavier than air
and may travel along the ground; distant ignition possible.
Chemical Dangers:
Reacts with
oxidants,
strong acids,
strong bases
and
reducing agents.
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.
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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 irritating to
the eyes,
the skin
and
the respiratory tract
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Exposure at high levels could cause lowering of consciousness.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Boiling point: 176°C
Melting point: -43°C
Relative density (water = 1): 0.84
Solubility in water: very poor
Vapour pressure, kPa at °C: 0.17
Relative vapour density (air = 1): 4.6
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Relative density of the vapour/air-mixture at 20°C (air = 1): 1.006
Flash point: 46°C c.c.
Explosive limits, vol% in air: 0.9-?
Octanol/water partition coefficient as log Pow: 3.7
Viscosity 1.24 cp (20 °C) Refractive index 1.4521 (20 °C)
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Environmental
Data
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N O T E S
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Health effects of exposure to the substance have not been investigated adequately.
Environmental effects from the substance have not been investigated.
adequately
Transport Emergency Card: TEC (R)-30GF1-III
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ADDITIONAL INFORMATION
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ICSC: 1619
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n-HEPTANETHIOL
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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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