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1,2-DICHLOROBENZENE ICSC: 1066
Date of Peer Review: November 2003

ortho-Dichlorobenzene
CAS # 95-50-1 C6H4Cl2
RTECS # CZ4500000 Molecular mass: 147.0
UN # 1591
EC # 602-034-00-7
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible.
NO open flames.
Powder, water spray, foam, carbon dioxide.
EXPLOSION Above 66C explosive vapour/air mixtures may be formed.
Above 66C use a closed system, ventilation.

EXPOSURE


Inhalation Cough. Drowsiness. Sore throat. Unconsciousness.
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.
Face shield.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Burning sensation. Diarrhoea. Nausea. Vomiting.
Do not eat, drink, or smoke during work.
Rinse mouth. Give plenty of water to drink. Do NOT induce vomiting. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT let this chemical enter the environment. (Extra personal protection: filter respirator for organic gases and vapours.)
Do not transport with food and feedstuffs. Marine pollutant.
EU 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
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GT1-III
NFPA Code: H2; F2; R0;
Separated from aluminium, oxidants and food and feedstuffs.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 1999

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1,2-DICHLOROBENZENE ICSC: 1066
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS TO YELLOW LIQUID, WITH CHARACTERISTIC ODOUR.

CHEMICAL DANGERS:
The substance decomposes on burning producing toxic and corrosive gases including hydrogen chloride. Reacts with aluminium and oxidants. Attacks plastic and rubber.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 25 ppm as TWA; 50 ppm as STEL; A4; (ACGIH 2003).
MAK: 10 ppm, 61 mg/m; H; Peak limitation category: II(2); Pregnancy risk group: C; (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 20C.

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

ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 1999
See Also:
        1,4-Dichlorobenzene (CHEMINFO)
        1-4,Dichlorobenzene (ICSC)