Product Identification

Product Name

C.I. 37230

Synonyms

3,3'-Dimethyl-(1,1'-biphenyl)-4,4'-diamine
3,3'-Dimethylbenzidine
4-(4-Amino-3-methylphenyl)-2-methylaniline
4,4'-Bi-o-toluidine
Bianisidine

CAS

119-93-7

Formula

C14H16N2

Molecular Weight

212.29

EINECS

204-358-0

RTECS

DD1225000

RTECS Class

Tumorigen; Mutagen

Merck

12,9651

Beilstein/Gmelin

2210640

Beilstein Reference

4-13-00-00419

EC Index Number

612-041-00-7

EC Class

Carcinogenic Category 2; Harmful; Dangerous for the Environment

Physical and Chemical Properties

Appearance

White to reddish crystals or crystalline powder or a light tan powder.

Solubility in water

1.3 g/L

Boiling Point

361

Vapor Pressure

2E-5 (25 C)

Density

1.234 g/cm3

pKa/pKb

9.31 (pKb)

Partition Coefficient

2.34

Heat Of Vaporization

60.7 kJ/mol

Heat Of Combustion

-1670 kJ/mol

Usage

Very sensitive reagent for detection of gold (1:10 million detectable), and free chlorine in water.

Refractive Index

1.641 (125 C)

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. Get medical aid if cough or other symptoms appear.

Skin

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

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

Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from light and air.

Handling

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.

Hazards Identification

Inhalation

May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.

Skin

Causes skin irritation.

Eyes

Causes eye irritation.

Ingestion

May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated.

Hazards

Contact with metals may evolve flammable hydrogen gas.

UN (DOT)

2811

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.

Exposure Effects

May cause cancer in humans.

Exposure limit(s)

TLV: ppm; mg/m3 A3 (skin) (ACGIH 1997). OSHA PEL: See Appendix C NIOSH REL: Ca C 0.02 mg/m3 60-minute skin See Appendix A See Appendix C NIOSH IDLH: Potential occupational carcinogen

Poison Class

1*

Fire Fighting Measures

Flash Point

205

Autoignition

526

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.

Fire Potential

This material is probably combustible.

Accidental Release Measures

Small spills/leaks

Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions.

Stability and Reactivity

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidizers

Decomposition

Nitrogen oxides, carbon monoxide, carbon dioxide.

Combustion Products

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

Transport Information

UN Number

2811

Hazard Class

6.1

Packing Group

I; II; III