Product Identification

Product Name

2-Methyl-1,4-benzenediamine

Synonyms

2,5-Diaminotoluene
2-Methylbenzene-1,4-diamine
2-Methyl-para-phenylenediamine
4-Amino-2-methylaniline
para-Toluenediamine
Toluene-2,5-diamine

CAS

95-70-5

Formula

C7H10N2

Molecular Weight

122.19

EINECS

202-442-1

RTECS

XS9700000

RTECS Class

Tumorigen; Mutagen; Primary Irritant

Beilstein/Gmelin

774521

Beilstein Reference

4-13-00-00246

EC Index Number

612-125-00-3

EC Class

Toxic; Harmful; Sensitising; Dangerous for the Environment

Physical and Chemical Properties

Appearance

Plates from benzene.

Solubility in water

Soluble

Melting Point

150 - 155

Boiling Point

273

Vapor Pressure

0.006 (25 C)

pKa/pKb

7.83 (pKb)

Partition Coefficient

.25

Heat Of Vaporization

51.2 kJ/mol

Usage

Intermediate in prodn of two dyes, ci basic red 2 & ci acid brown 103, in hair dyes.

First Aid Measures

Ingestion

Do not induce emesis. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.

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

Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.

Eyes

Irrigate exposed eyes 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.

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

Bronchospasm may develop in sensitized individuals.

Skin

Contact dermatitis is common.

Eyes

Significant laryngeal and facial edema may occur. Breathing may be impaired as a result of laryngeal edema. Immediate (usually) or delayed hypersensitivity reactions have been described following application of PPD-containing hair dyes to eyebrows or eyelashes. Eye pain and burning, and edema occur, which may progress to widespread facial edema, dermatitis, tearing, photophobia, uveitis, and keratitis. Corneal necrosis and vision loss may occur. Bilateral optic neuritis has been reported with blindness.

Ingestion

Epigastric pain and recurrent vomiting are common shortly following ingestion.

Hazards

Contact with metals may evolve flammable hydrogen gas.

UN (DOT)

3259

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate protective gloves, clothing and goggles.

Respirators

Wear positive pressure self-contained breathing apparatus (SCBA).

Exposure Effects

Abnormally low blood pressure and labored respirations may occur. CNS depression and peripheral neuropathy have been reported after ingestion.

Fire Fighting Measures

Flash Point

140

Fire Fighting

DOT recommendations-for small fires, use dry chemicals, carbon dioxide, water spray, or foam. For large fires, use water spray, fog, or foam. If you can do it without risk, move containers from fire area.

Fire Potential

Burns but does not ignite readily.

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

No data.

Combustion Products

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

Transport Information

UN Number

3259

Hazard Class

8

Packing Group

I; II; III