ortho-Dichlorobenzene
C6H4Cl2
Molecular mass: 147.0
ICSC # 1066
CAS # 95-50-1
RTECS # CZ4500000
UN # 1591
EC # 602-034-00-7
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Combustible.
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NO open flames.
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Powder, water spray, foam, carbon dioxide.
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Explosion
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Above 66°C explosive vapour/air mixtures may be formed.
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Above 66°C use a closed system, ventilation.
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Exposure
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•Inhalation
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Cough.
Drowsiness.
Sore throat.
Unconsciousness.
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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Redness.
Pain.
Dry skin.
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Protective gloves.
Protective clothing.
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Remove contaminated clothes.
Rinse skin with plenty of water or shower.
Refer for medical attention.
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•Eyes
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Redness.
Pain.
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Face shield.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Burning sensation.
Diarrhoea.
Nausea.
Vomiting.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Give plenty of water to drink.
Do NOT induce vomiting.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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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.)
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Separated from
aluminium
,
oxidants
and
food and feedstuffs
.
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Do not transport with food and feedstuffs.
Marine pollutant.
Xn symbol
N symbol
R: 22-36/37/38-50/53
S: 2-23-60-61
UN Hazard Class: 6.1
UN Packing Group: III
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Important Data
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Physical State; Appearance:
COLOURLESS
TO YELLOW
LIQUID
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
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:
OSHA PEL: C 50 ppm (300 mg/m3)
NIOSH REL: C 50 ppm (300 mg/m3)
NIOSH IDLH: 200 ppm See: 95501
TLV: 25 ppm as TWA; 50 ppm as STEL; A4; (ACGIH 2003).
MAK: 10 ppm, 61 mg/m3 H;
Peak limitation category: II(2); Pregnancy risk group: C;
(DFG 2003).
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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
,
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
.
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Physical
Properties
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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
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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
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Environmental
Data
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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.
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N O T E S
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Transport Emergency Card: TEC (R)-61GT1-III
NFPA Code: H2; F2; R0;
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ADDITIONAL INFORMATION
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ICSC: 1066
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1,2-DICHLOROBENZENE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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