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1,2-DICHLOROBENZENEICSC: 1066
ortho-DichlorobenzeneNovember 2003
CAS #: 95-50-1
UN #: 1591
EC Number: 202-425-9

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible.  Above 66°C explosive vapour/air mixtures may be formed.  NO open flames.  Above 66°C use a closed system and ventilation.  Use water spray, powder, foam, carbon dioxide.   

   
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Drowsiness. Sore throat. Unconsciousness.  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 CLASSIFICATION & 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. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 6.1; UN Pack Group: III 

STORAGE
Separated from aluminium, oxidants and food and feedstuffs. 
PACKAGING
Do not transport with food and feedstuffs.
Marine pollutant. 
1,2-DICHLOROBENZENE ICSC: 1066
PHYSICAL & CHEMICAL INFORMATION

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. 

Formula: C6H4Cl2
Molecular mass: 147.0
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  


EXPOSURE & HEALTH EFFECTS

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

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. 

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

Effects of long-term or repeated exposure
The substance defats the skin, which may cause dryness or cracking. The substance may have effects on the kidneys and blood. 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 25 ppm as TWA; 50 ppm as STEL; A4 (not classifiable as a human carcinogen).
MAK: 61 mg/m3, 10 ppm; peak limitation category: II(2); skin absorption (H); pregnancy risk group: C.
EU-OEL: 122 mg/m3, 20 ppm as TWA; 306 mg/m3, 50 ppm as STEL; (skin) 

ENVIRONMENT
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
  EC Classification
Symbol: Xn, N; R: 22-36/37/38-50/53; S: (2)-23-60-61 

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