Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information
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4-Methylbenzenesulfonic acid(104-15-4)

Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information

Product Identification

Product Name
4-Methylbenzenesulfonic acid
Synonyms
4-Methylbenzenesulfonic acid
Cyzac 4040
Nacure 1040
p-Methylphenylsulfonic acid
p-Toluenesulfonic acid
Toluene-4-sulfonic acid
CAS
104-15-4
Formula
C7H8O3S
Molecular Weight
172.2
EINECS
203-180-0
RTECS
XT6300000
RTECS Class
Other
Merck
12,9671
Beilstein/Gmelin
472690
Beilstein Reference
4-11-00-00241
EC Index Number
016-030-00-2
EC Class
Irritant

Physical and Chemical Properties

Appearance
Monoclinic leaflets or prisms.
Solubility in water
Very soluble
Melting Point
106-107
Boiling Point
332
Density
1.24 g/cm3 (20 C)
Partition Coefficient
.93
Heat Of Vaporization
Heat Of Combustion
-3530 kJ/mol
Usage
Used as reagent in kirsten modification of kleber method (for lemon oil).

First Aid Measures

Ingestion
Seek medical assistance.
Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
Skin
Wash the exposed area with copious amounts of water. A physician should examine the area if irritation or pain persists.
Eyes
Exposed eyes should be irrigated with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility. Irrigation: in a medical facility, irrigate with sterile saline for at least an hour.

Handling and Storage

Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

Hazards Identification

Inhalation
Inhalation may produce dyspnea, pleuritic chest pain, upper airway edema, pulmonary edema, hypoxemia, bronchospasm, pneumonitis, and persistent pulmonary function abnormalities. Airway hyperreactivity has also been reported.
Skin
Contact with molten substance may cause severe burns to skin and eyes. See Inhalation.
Eyes
See Inhalation.
Ingestion
Ingestion of acids may result in burns, gastrointestinal bleeding, gastritis, perforations, dilation, edema, necrosis, vomiting, stenosis, fistula, and duodenal/jejunal injury.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
UN (DOT)
2585

Exposure Controls/Personal Protection

Personal Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Exposure Effects
Abnormal neuropsychologic function has been reported following hydrochloric acid exposure from a leaking tanker truck.
Exposure limit(s)
OEL-UNITED KINGDOM:TWA 10 ppm (25 mg/m3);STEL 15 ppm (35 mg/m3)
Poison Class
3

Fire Fighting Measures

Flash Point
184
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
Ignites after considerable preheating.

Accidental Release Measures

Small spills/leaks
ELIMINATE all ignition sources. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.

Stability and Reactivity

Stability
Normally stable; unstable at high temperature and pressure.
Incompatibilities
Reacts with water. A strong acid which can react with common metals. Explosions can occur when using an analytical method involving sequential addition if acetic acid, aqueous p-toluenesulfonic acid and acetic anhydride to serum.
Combustion Products
Fire may produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number
2585
Hazard Class
8
Packing Group
III
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