4-Toluenesulfonic acid monohydrate

  • p-Toluenesulfonic acid, monohydrate
  • 4-Methylbenzenesulfonic acid monohydrate
Formula
CH3C6H4SO3H.H2O
Structure
Description
White crystals.

Registry Numbers and Inventories.
CAS
6192-52-5
EC (EINECS/ELINCS)
203-180-0
EC Index Number
016-030-00-2
EC Class
irritant
R 36/37/38
RTECS
DB7164000
RTECS class
Other
UN (DOT)
2585
Merck
12,9671
Beilstein/Gmelin
3568023
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C7H8O3S . H2O
Formula mass
190.22
Melting point, °C
102-104
Vapor density (air=1)
5.9
Density
1.240 g/cm3 (20 C)
Solubility in water
750 g/L (20 C)

Hazards and Protection.
Storage
Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances. Do not store near alkaline substances. Store protected from moisture.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Use only in a chemical fume hood. Discard contaminated shoes.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.
Disposal code
4
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Moisture.
Decomposition
Carbon monoxide, oxides of sulfur, irritating and toxic fumes and gases, carbon dioxide, sodium oxide.

Fire.
Flash Point,°C
180
Autoignition, °C
600
Fire fighting
Small Fires: Dry chemical, carbon dioxide or water spray. Large Fires: Dry chemical, carbon dioxide, alcohol-resistant foam or water spray.
Fire potential
Combustible material: may burn but does not ignite readily.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
1
 
 
Reactivity
0
 

Health.
Poison_Class
3 (Strong toxins)
Exposure effects
   Ingestion
Causes digestive tract irritation with possible burns.
   Inhalation
May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema. May cause burns to the respiratory tract.
   Skin
Causes skin irritation and possible burns.
   Eyes
May cause irreversible eye injury. Causes eye irritation and possible burns.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Destroy contaminated shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
2585
Response guide
Hazard class
8
Packing Group
III
 
HS Code
2904 10 00