Dinitrobenzene

  • Dinitrobenzol
Formula
C6H4N2O4
Structure
Description
Dinitrobenzene is a white or yellow crystalline solid or dissolved in a liquid carrier.
Uses
Organic synthesis, dyes, camphor substitute in cellulose nitrate.

Registry Numbers and Inventories.
CAS
25154-54-5
EC (EINECS/ELINCS)
246-673-6
EC Index Number
609-004-00-2
EC Class
Very toxic; Danger of cumulative effects; Dangerous for the Environment
RTECS
CZ7340000
RTECS class
Other
UN (DOT)
1597
Beilstein/Gmelin
NA
Japan ENCS (MITI)
Listed

Properties.
Formula
C6H4N2O4
Formula mass
168.12
Melting point, °C
88
Density
1.625 g/cm3 (18 C)
Solubility in water
insoluble
Partition coefficient, pKow
1.79
Heat of fusion
28.1 kJ/mol
Heat of vaporization
55.8 kJ/mol
Heat of combustion
-2809 kJ/mol

Hazards and Protection.
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.
Protection
Wear appropriate equipment to prevent reasonable probability of skin contact; wear eye protection to prevent reasonable probability of eye contact.
Respirators
Any self-contained breathing apparatus with a full facepiece and operated in a pressure-demand or other positive pressure mode or any supplied-air respirator with a full facepiece and operated in a pressure-demand or other positive pressure mode in combination with an auxiliary self-contained breathing apparatus operated in pressure-demand or other positive pressure mode
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Apply water spray or mist to knock down vapors. Vapor knockdown water is corrosive or toxic and should be diked for containment. 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 deep water pockets, excavated lagoons, or sand bag barriers to trap material at bottom. If dissolved, in region of 10 ppm or greater concentration, apply activated carbon at ten times the spilled amount. Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.
Stability
Thermally unstable.
Incompatibilities
May react vigorously with oxidizing materials.

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 alcohol foam, dry chemical or carbon dioxide. If fire is massive, back off, protect surroundings, and let burn.
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 oxides of nitrogen are produced during combustion of this material.
Health
3
 
Flammability
1
 
 
Reactivity
4
 

Health.
Exposure limit(s)
IDHL: 200 mg/m3
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
1597
Response guide
Hazard class
6.1
Packing Group
II
 
USCG CHRIS Code
DNZ
 
Std. Transport #
4921421