Prisms from benzene or water.
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.
Registry Numbers and Inventories.
EC Index Number
Mutagenic Category 3; Harmful; Sensitising; Dangerous for the Environment
R 21/22 43 51/53 68
S 24 36/37 61
Japan ENCS (MITI)
Melting point, °C
Boiling point, °C
280 - 282
Vapor pressure, mmHg
0.003 (25 C)
Solubility in water
Partition coefficient, pKow
Heat of vaporization
Hazards and Protection.
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.
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.
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.
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
Sweep up, then place into a suitable container for disposal.
Stable under normal temperatures and pressures.
Strong oxidizing agents - strong acids.
Nitrogen oxides, carbon monoxide, carbon dioxide, nitrogen.
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.
This material is probably combustible.
Contact with metals may evolve flammable hydrogen gas.
Fire may produce irritating, corrosive and/or toxic gases.
NIOSH: Potential Occupation al Carcinogen.
CNS effects include headache, dizziness, altered mental status, confusion (lethargy progressing coma), seizures, syncope; occur secondary to CNS hypoxia, usually with levels > 20%.
Nausea and vomiting may occur.
Dyspnea and tachypnea may occur.
Central cyanosis unresponsive to oxygen therapy is classic.
Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
Remove from exposure to fresh air immediately.
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids.