Product Identification

Product Name

3,3'-Dimethylbenzidine dihydrochloride

Synonyms

4-(4-Amino-3-methylphenyl)-2-methylaniline dihydrochloride
4,4'-Bi-o-toluidine dihydrochloride
o-Tolidine dihydrochloride

CAS

612-82-8

Formula

C14H18Cl2N2

Molecular Weight

285.24

EINECS

210-322-5

RTECS

DD1226000

RTECS Class

Tumorigen; Mutagen

Beilstein/Gmelin

3713238

Beilstein Reference

0-13-00-00256

EC Index Number

612-081-00-5

EC Class

Carcinogenic Category 2; Harmful; Dangerous for the Environment

Physical and Chemical Properties

Appearance

Light tan powder.

Solubility in water

Soluble

Melting Point

130

First Aid Measures

Ingestion

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

Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.

Skin

Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.

Eyes

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

Do not store in direct sunlight. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.

Handling

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.

Hazards Identification

Ingestion

May cause irritation of the digestive tract.

Inhalation

Causes respiratory tract irritation.

Skin

Causes skin irritation.

Eyes

May cause eye burns.

UN (DOT)

1789

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 protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.

Respirators

Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Fire Fighting Measures

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Dusts at sufficient concentrations can form explosive mixtures with air. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire use water spray, dry chemical, carbon dioxide, or appropriate foam.

Accidental Release Measures

Small spills/leaks

Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Carefully scoop up and place into appropriate disposal container. Provide ventilation.

Stability and Reactivity

Stability

Stable under normal shipping and handling conditions. However, may decompose if heated.

Incompatibilities

Strong oxidizers.

Decomposition

Hydrogen chloride, nitrogen oxides, carbon monoxide, carbon dioxide.

Transport Information

UN Number

1789