Nitrotoluene

  • Methylnitrobenzene
  • Mononitrotoluene
  • Nitrophenylmethane
  • Nitrotoluol
Formula
C7H7NO2
Structure
Description
Exists as either a yellow solid crystal or liquid.
Uses
Manufacture of dyes, toluidines, nitrobenzoic acids.

Registry Numbers and Inventories.
CAS
1321-12-6
EC (EINECS/ELINCS)
215-311-9
UN (DOT)
1664
Beilstein/Gmelin
NA
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C7H7NO2
Formula mass
137.14
Melting point, °C
54
Boiling point, °C
238
Vapor density (air=1)
4.7
Density
1.16 g/cm3
Solubility in water
Almost insoluble
Partition coefficient, pKow
1.75

Hazards and Protection.
Storage
Store in cool, dry, well-ventilated location. Separate from alkalies, acids, oxidizing materials, and reducing agents.
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.
Protection
Wear appropriate chemical protective clothing. Wear positive pressure self-contained breathing apparatus when fighting fires involving this material.
Respirators
Wear positive pressure self-contained breathing apparatus.
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard. Apply water spray or mist to knock down vapors. Combustion products include corrosive or toxic vapors. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Water spill: Use natural barriers or oil spill control booms to limit spill travel. Remove trapped material with suction hoses.
Stability
Heat contributes to instability.
Incompatibilities
Nitrotoluene will attack some forms of plastics, rubber, and coatings. Contact with strong oxidizers or sulfuric acid may cause fires and explosions.

Fire.
Fire fighting
Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use foam, dry chemical, or carbon dioxide.
Fire potential
May burn but does not ignite readily.
Hazards
Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.
Combustion products
Toxic gases and vapors (such as oxides of nitrogen and carbon monoxide) may be released in a fire involving nitrotoluene.
Health
3
 
Flammability
1
 
 
Reactivity
1
 

Health.
Exposure limit(s)
OSHA: PEL (8 h TWA): 5 ppm
Exposure effects
Rapid heart rate, rapid breathing, abnormally low blood pressure, and respiratory depression may occur. Headache, dizziness, lethargy, and coma are possible. Nitrobenzene is a possible animal teratogen.
   Ingestion
Nausea and vomiting may occur. Urine and vomitus may have the odor of bitter almonds.
   Inhalation
Respiratory failure may occur.
   Skin
Persistent cyanosis in spite of oxygen therapy usually occurs when the methemoglobin level is greater than 15 percent.
   Eyes
Brown discoloration of the vessels of the fundus and the mucous membrane that lines the inner surface of the eyelid and the exposed surface of the eyeball may occur. Changes in visual acuity, decreased visual fields, irritation and a diminishing vision within the visual field may occur.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists. If patient is cyanotic and symptomatic, methemoglobinemia is likely and methylene blue therapy should be initiated.
   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.

Transport.
UN number
1664
Response guide
Hazard class
6.1
Packing Group
II
 
USCG CHRIS Code
NIT
 
42 Nitrocompounds
Std. Transport #
4921758 4921749
 
IMO Chemical Code
17
IMO Pollution Category
B
IMO Hazard code
S/P