4-Methylbenzenesulfonic acid
p-Methylphenylsulfonic acid
Tosic acid
Toluene-4-sulfonic acid
C7H8O3S / CH3C6H4SO3H
Molecular mass: 172.2
ICSC # 0773
CAS # 104-15-4
RTECS # XT6300000
UN # 2585 (See Notes)
EC # 016-030-00-2
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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, alcohol-resistant foam, water spray, 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 DISPERSION OF DUST!
AVOID ALL CONTACT!
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IN ALL CASES CONSULT A DOCTOR!
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•Inhalation
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Sore throat.
Cough.
Burning sensation.
Laboured breathing.
Shortness of breath.
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Local exhaust.
Breathing protection.
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Fresh air, rest.
Half-upright position.
Artificial respiration may be needed.
Refer immediately for medical attention.
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•Skin
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Redness.
Pain.
Serious skin burns.
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Protective gloves.
Protective clothing.
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Remove contaminated clothes.
Rinse skin with plenty of water or shower.
Refer immediately for medical attention.
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•Eyes
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Redness.
Pain.
Burns
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Face shield
and
eye protection in combination with breathing protection.
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Rinse with plenty of water (remove contact lenses if easily possible).
Refer immediately for medical attention.
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•Ingestion
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Sore throat.
Burning sensation in the throat and chest.
Shock or collapse.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Do NOT induce vomiting.
Refer immediately for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Personal protection: complete protective clothing including self-contained breathing apparatus.
Sweep spilled substance into dry covered plastic containers.
Carefully collect remainder,
then remove to safe place
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Dry.
Separated from
strong bases,
food and feedstuffs.
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Do not transport with food and feedstuffs.
Xi symbol
R: 36/37/38
S: 2-26-37
UN Hazard Class: 8
UN Packing Group: III
Signal: Danger
Excl mark-Corr
Harmful if swallowed
Causes severe skin burns and eye damage
Harmful to aquatic life
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Important Data
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Physical State; Appearance:
COLOURLESS HYGROSCOPIC FLAKES
.
Physical Dangers:
Chemical Dangers:
The substance decomposes
on heating
or
on burning
producing toxic and corrosive fumes including sulfur oxides.
The substance is a strong acid, it reacts violently with bases and is corrosive.
Attacks many metals forming flammable/explosive gas (hydrogen - see ICSC 0001).
Occupational Exposure Limits:
TLV not established.
MAK not established.
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Routes of Exposure:
Serious local effects by all routes of exposure.
Inhalation Risk:
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed, especially if powdered.
Effects of Short-Term Exposure:
The substance
is corrosive to
the eyes,
the skin and
the respiratory tract.
Corrosive on ingestion.
Inhalation of aerosol may cause lung oedema (see Notes).
Medical observation is indicated.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Melting point: 106-107°C
Relative density (water = 1): 1.24
Solubility in water, g/100 ml at 25°C: 67
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Flash point: 184°C c.c.
Octanol/water partition coefficient as log Pow: 0.9 (calculated)
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Environmental
Data
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The substance is harmful to aquatic organisms.
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N O T E S
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The symptoms of lung oedema 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.
Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered.
UN 2585 applies to p-toluenesulfonic acid with no more than 5% free sulfuric acid.
UN 2583 applies to p-toluenesulfonic acid with more than 5% free sulfuric acid. Hydrated form has CAS number 6192-52-5.
Transport Emergency Card: TEC (R)-80GC4-II+III
NFPA Code: H3; F1; R0
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ADDITIONAL INFORMATION
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ICSC: 0773
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p-TOLUENESULFONIC ACID (max. 5% sulfuric acid)
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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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