Product Identification

Product Name

2,6-Diamino-1-methylbenzene

Synonyms

1,3-Diamino-2-methylbenzene
2-Methyl-1,3-benzenediamine
2-Methyl-m-phenylenediamine

CAS

823-40-5

Formula

C7H10N2

Molecular Weight

122.19

EINECS

212-513-9

RTECS

XS9750000

RTECS Class

Mutagen

Beilstein/Gmelin

2079476

Beilstein Reference

3-13-00-00291

EC Index Number

612-151-00-5

EC Class

Mutagenic Category 3; Harmful; Sensitising; Dangerous for the Environment

Physical and Chemical Properties

Appearance

Prisms from benzene or water.

Solubility in water

Very soluble

Melting Point

113

Boiling Point

280 - 282

Vapor Pressure

0.003 (25 C)

pKa/pKb

9.26 (pKb)

Partition Coefficient

-.36

Heat Of Vaporization

52.3 kJ/mol

Usage

Chemical intermediate for toluene diisocyanate, polyether polyols, rubber chemicals, curing agent for epoxy resins, monomer, chain extender & crosslinker for polymers (mixt with 2,4-isomer), chemical intermediate for dyes.

First Aid Measures

Ingestion

Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.

Inhalation

Remove from exposure to fresh air immediately.

Skin

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

Eyes

Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids.

Handling and Storage

Storage

Storage location should be close to laboratory where it is to be used, so that only small amounts need to be transported. Carcinogens should be kept in only one section of storage area, explosion-proof refrigerator or freezer as required. The area should be appropriately labeled. An inventory should be kept showing the quantity of carcinogen and date it was acquired. Facilities for dispensing should be contiguous to storage area.

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

Dyspnea and tachypnea may occur.

Skin

Central cyanosis unresponsive to oxygen therapy is classic.

Eyes

Redness, pain.

Ingestion

Nausea and vomiting may occur.

Hazards

Contact with metals may evolve flammable hydrogen gas.

EC Risk Phrase

R 21/22 43 51/53 68

EC Safety Phrase

S 24 36/37 61

UN (DOT)

2811

Exposure Controls/Personal Protection

Personal Protection

Eyes: Wear safety glasses and chemical goggles if splashing is possible. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.

Respirators

Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.

Exposure Effects

CNS effects include headache, dizziness, altered mental status, confusion (lethargy progressing coma), seizures, syncope; occur secondary to CNS hypoxia, usually with levels > 20%.

Exposure limit(s)

NIOSH: Potential Occupation al Carcinogen.

Fire Fighting Measures

Flash Point

148

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, dry chemical, chemical foam, or alcohol-resistant foam.

Fire Potential

This material is probably combustible.

Accidental Release Measures

Small spills/leaks

Sweep up, then place into a suitable container for disposal.

Stability and Reactivity

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents - strong acids.

Decomposition

Nitrogen oxides, carbon monoxide, carbon dioxide, nitrogen.

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