Dichlorobenzene

  • Dilatin
Formula
C6H4Cl2
Structure
Description
Most likely a liquid; the ortho and meta isomers are liquids. Para isomer is a crystalline solid.

Registry Numbers and Inventories.
CAS
25321-22-6
EC (EINECS/ELINCS)
246-837-7
Beilstein/Gmelin
NA
Swiss Giftliste 1
G-4327
Canada DSL/NDSL
DSL
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C6H4Cl2
Formula mass
147.00
Vapor pressure, mmHg
2 (25 C)
Vapor density (air=1)
5.07
Odor Threshold Odor threshold 0.02 ppm in water.
Critical temperature
410.8
Critical pressure
38.3
Density
1.30 g/cm3 (25 C)
Solubility in water
0.014% by wt@ 20 C
Surface tension
36.01 g/s2
Partition coefficient, pKow
3.43 - 3.53
Heat of combustion
-2765 kJ/mol

Hazards and Protection.
Storage
Protect against physical damage. Inside storage should be in a standard flammable liquids storage room or cabinet.
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
Maximum 50 ppm. At spill sites of high vapor densities, eye and respiratory equipment and protective clothing are advisable. Use full face mask with self-contained breathing apparatus.
Respirators
Any self-contained breathing apparatus with a full facepiece and operated in a pressure-demand or other positive pressure mode. Any supplied-air respirator with a full face piece and operated in 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
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Stability
Stable.
Incompatibilities
Incompatible with strong oxidizing and reducing agents Incompatible with amines, nitrides, azo/diazo compounds, with alkali metals, and with epoxides.

Fire.
Fire fighting
Fire fighting phases: not soluble in water. Use water spray, foam, carbon dioxide, or dry chemical.
Fire potential
Moderately flammable. Combustion with moderate heating.
Health
2
 
Flammability
2
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
Withdrawal of pdb in a habituated adult would cause tremulousness and sluggishness. Minimal data are available. <br>Campbell reported a woman who ingested 1 to 2 air freshener blocks per week during her pregnancy. Her offspring developed no abnormalities.
   Ingestion
Nausea, vomiting, and diarrhea may occur.
   Inhalation
Chronic exposure resulted in pulmonary granulomatosis in one case. Dyspnea was noted in an allergic reaction. Animals chronically exposed to vapors developed pulmonary edema and hyperemia.
   Skin
P-dichlorobenzene may produce irritation. Hypersensitivity reactions include purpura and hyperpigmentation. Orthodichlorobenzene may produce blistering and hyperpigmentation with prolonged skin contact.

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
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   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.
USCG CHRIS Code
DBX
 
36 Halogenated hydrocarbons
IMO Chemical Code
17
IMO Pollution Category
B
IMO Hazard code
S/P