Thiophenol
Mercaptobenzene
Phenyl mercaptan
C6H6S / C6H5SH
Molecular mass: 110.2
ICSC # 0463
CAS # 108-98-5
RTECS # DC0525000
UN # 2337
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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, AFFF, foam, carbon dioxide.
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Explosion
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In case of fire: keep drums, etc., cool by spraying with water.
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Exposure
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PREVENT GENERATION OF MISTS!
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•Inhalation
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Cough.
Headache.
Nausea.
Sore throat.
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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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MAY BE ABSORBED!
Redness.
Pain.
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Protective gloves.
Protective clothing.
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Remove contaminated clothes.
Rinse skin with plenty of water or shower.
Refer for medical attention.
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•Eyes
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Redness.
Pain.
Blurred vision.
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Safety goggles
or
eye protection in combination with breathing protection.
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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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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 liquid in sealable containers.
Absorb remaining liquid in sand or inert absorbent and remove to safe place.
Chemical protection suit including self-contained breathing apparatus.
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Separated from
strong oxidants,
strong acids,
food and feedstuffs
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Do not transport with food and feedstuffs.
UN Hazard Class: 6.1
UN Subsidiary Risks: 3
UN Packing Group: I
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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
or
on contact with
acids
producing
toxic fumes
(
sulfur oxides
).
Reacts
with
strong oxidants
.
Occupational Exposure Limits:
TLV: 0.1 ppm as TWA; (skin); (ACGIH 2005).
MAK not established.
OSHA PEL: none
NIOSH REL: C 0.1 ppm (0.5 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,
through the skin
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 nervous system.
Effects of Long-Term or Repeated Exposure:
Repeated or prolonged contact with skin may cause dermatitis.
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Physical
Properties
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Boiling point: 168°C
Melting point: -15°C
Relative density (water = 1): 1.07
Solubility in water:
none
Vapour pressure, kPa at 18°C: 0.13
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Relative vapour density (air = 1): 3.8
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.00
Flash point: <55°C
Explosive limits, vol% in air: 1.2-?
Octanol/water partition coefficient as log Pow: 2.52
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Environmental
Data
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N O T E S
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Card has been partly updated in October 2005. See section Emergency Response.
Transport Emergency Card: TEC (R)-61GTF1-I
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ADDITIONAL INFORMATION
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ICSC: 0463
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BENZENETHIOL
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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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