Product Identification

Product Name

4-Methylbenzenesulfonic acid monohydrate

Synonyms

4-Methylbenzenesulfonic acid monohydrate
p-Toluenesulfonic acid, monohydrate

CAS

6192-52-5

Formula

C7H10O4S

Molecular Weight

190.22

EINECS

203-180-0

RTECS

DB7164000

RTECS Class

Other

Merck

12,9671

Beilstein/Gmelin

3568023

EC Index Number

016-030-00-2

EC Class

irritant

Physical and Chemical Properties

Appearance

White crystals.

Solubility in water

750 g/L (20 C)

Melting Point

102-104

Density

1.240 g/cm3 (20 C)

Vapor Density

5.9

First Aid Measures

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.

Handling and Storage

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.

Hazards Identification

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.

Hazards

When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.

EC Risk Phrase

R 36/37/38

EC Safety Phrase

S 26 37

UN (DOT)

2585

Exposure Controls/Personal Protection

Personal 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.

Poison Class

3 (Strong toxins)

Fire Fighting Measures

Flash Point

180

Autoignition

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.

Accidental Release Measures

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.

Stability and Reactivity

Disposal Code

4

Incompatibilities

Moisture.

Stability

Stable under normal temperatures and pressures.

Decomposition

Carbon monoxide, oxides of sulfur, irritating and toxic fumes and gases, carbon dioxide, sodium oxide.

Combustion Products

Fire may produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

2585

Hazard Class

8

Packing Group

III

HS Code

2904 10 00