IPCS INCHEM Home
p-TOLUENESULFONIC ACID (max. 5% sulfuric acid)
ICSC: 0773
Peer-Review Status: 12.10.2006 Validated
4-Methylbenzenesulfonic acid
p-Methylphenylsulfonic acid
Tosic acid
Toluene-4-sulfonic acid 
CAS #: 104-15-4 RTECS #: XT6300000
UN #: 2585
EC #: 016-030-00-2
EINECS #: 203-180-0
    Formula: C7H8O3S / CH3C6H4SO3H
Molecular mass: 172.2

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.  Use water spray, powder, alcohol-resistant foam, carbon dioxide. 
EXPLOSION     In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE   PREVENT DISPERSION OF DUST! AVOID ALL CONTACT!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Sore throat. Cough. Burning sensation. Laboured breathing. Shortness of breath. See Notes.  Use local exhaust. Use breathing protection.  Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer immediately for medical attention. 
Skin Redness. Pain. Serious skin burns.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer immediately for medical attention. 
Eyes Redness. Pain. Burns.  Wear face shield or eye protection in combination with breathing protection.  Rinse with plenty of water for several minutes (remove contact lenses if easily possible). Blue haze and halo. 
Ingestion Sore throat. Burning sensation in the throat and chest. Shock or collapse.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Refer immediately for medical attention. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: complete protective clothing including self-contained breathing apparatus. Sweep spilled substance into covered dry, plastic containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.  Do not transport with food and feedstuffs. 
EC Classification
Symbol: Xi; R: 36/37/38; S: (2)-26-37 
UN Classification
UN Hazard Class: 8; UN Pack Group: III 
GHS Classification
Signal: Danger
Harmful if swallowed
Causes severe skin burns and eye damage
Harmful to aquatic life 
excl mark;warncorr

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-80GC4-II+III.
NFPA Code: H3; F1; R0. 
Dry. Separated from strong bases and food and feedstuffs. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS HYGROSCOPIC FLAKES. 

Physical dangers
 

Chemical dangers
Decomposes on heating and on burning. This produces toxic and corrosive fumes including sulfur oxides. The substance is a strong acid. It reacts violently with bases and is corrosive. Attacks many metals. This produces flammable/explosive gas (hydrogen - see ICSC 0001). 

Occupational exposure limits
TLV (NOT-ESTABLISHED):. 

Routes of exposure
Serious 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, skin and respiratory tract. Corrosive on ingestion. Inhalation of the aerosol may cause lung oedema. See Notes. Medical observation is indicated. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Melting point: 106-107°C
Relative density (water = 1): 1.24
Solubility in water, g/100ml at 25°C:
Flash point: 184°C c.c.
Octanol/water partition coefficient as log Pow: 0.9 (calculated) 
The substance is harmful to aquatic organisms. 

NOTES
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. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations