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1,2-DICHLOROBENZENE
ICSC: 1066
Peer-Review Status: 26.11.2003 Validated
ortho-Dichlorobenzene 
CAS #: 95-50-1 RTECS #: CZ4500000
UN #: 1591
EC #: 602-034-00-7
EINECS #: 202-425-9
    Formula: C6H4Cl2
Molecular mass: 147.0

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible.  NO open flames.  Use water spray, powder, foam, carbon dioxide. 
EXPLOSION Above 66°C explosive vapour/air mixtures may be formed.  Above 66°C use a closed system and ventilation.   
 
EXPOSURE      
Inhalation Cough. Drowsiness. Sore throat. Unconciousness.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Redness. Pain. Dry skin.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness. Pain.  Wear face shield.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Burning sensation. Diarrhoea. Nausea. Vomiting.  Do not eat, drink, or smoke during work.  Rinse mouth. Give one or two glasses of water to drink. Do NOT induce vomiting. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.  Do not transport with food and feedstuffs.
Marine pollutant. 
EC Classification
Symbol: Xn, N; R: 22-36/37/38-50/53; S: (2)-23-60-61 
UN Classification
UN Hazard Class: 6.1; UN Pack Group: III 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61GT1-III.
NFPA Code: H2; F2; R0. 
Separated from aluminium, oxidants and food and feedstuffs. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS-TO-YELLOW LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
 

Chemical dangers
Decomposes on burning. This produces toxic and corrosive gases including hydrogen chloride. Reacts with aluminium and oxidants. Attacks plastics and rubber. 

Occupational exposure limits
TLV: 25 ppm as TWA; 50 ppm as STEL; A4 (not classifiable as a human carcinogen); (ACGIH 2003).
MAK: 10 ppm, 61 mg/m³; Peak limitation category: II(2); Pregnancy risk group: C; Skin absorption (H); (DFG 2003). 

Routes of exposure
The substance can be absorbed into the body by inhalation, through the skin and by ingestion. 

Inhalation risk
A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20°C. 

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. The substance may cause effects on the central nervous system and liver. Exposure could cause lowering of consciousness. 

Effects of long-term or repeated exposure
The liquid defats the skin. The substance may have effects on the kidneys and blood. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 180-183°C
Melting point: -17°C
Relative density (water = 1): 1.3
Solubility in water: very poor
Vapour pressure, kPa at 20°C: 0.16
Relative vapour density (air = 1): 5.1
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.006
Flash point: 66°C c.c.
Auto-ignition temperature: 648°C
Explosive limits, vol% in air: 2.2-9.2
Octanol/water partition coefficient as log Pow: 3.38  
The substance is toxic to aquatic organisms. Bioaccumulation of this chemical may occur in fish. It is strongly advised not to let the chemical enter into the environment. 

NOTES
 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations
       1,2-Dichlorobenzene  (SIDS)