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DIETHYLBENZENE (Mixed isomers)
ICSC: 0445
Peer-Review Status: 12.11.2010 Validated
DEB mixed isomers 
CAS #: 25340-17-4 RTECS #: CZ5600000
UN #: 2049
EINECS #: 246-874-9
    Formula: CH3CH2(C6H4)CH2CH3/C10H14
Molecular mass: 134.2

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Flammable.  NO open flames, NO sparks and NO smoking. NO contact with hot surfaces.  Use water spray, foam, powder, carbon dioxide. 
EXPLOSION Above 56°C explosive vapour/air mixtures may be formed.  Above 56°C use a closed system, ventilation and explosion-proof electrical equipment. Prevent build-up of electrostatic charges (e.g., by grounding).  In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE      
Inhalation Cough. Dizziness. Headache. Drowsiness.  Use local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Redness. Pain.  Protective gloves.  Remove contaminated clothes. Rinse skin with plenty of water or shower. 
Eyes Redness. Pain.  Wear safety spectacles or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Nausea. Vomiting. Diarrhoea. Incoordination. Further see Inhalation.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Give one or two glasses of water to drink. 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.   
EC Classification
 
UN Classification
UN Hazard Class: 3; UN Pack Group: III 
GHS Classification
Signal: Warning
Flammable liquid and vapour
Harmful if inhaled
May be harmful if swallowed or in contact with skin
Very toxic to aquatic life 
flam;flameexcl mark;warnenviro;aqua

EMERGENCY RESPONSE SAFE STORAGE
  Separated from strong oxidants. Store in an area without drain or sewer access. 

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

Physical dangers
As a result of flow, agitation, etc., electrostatic charges can be generated. 

Chemical dangers
Decomposes on burning. This produces toxic and corrosive fumes including carbon monoxide (see ICSC 0023) and formaldehyde (see ICSC 0275). Reacts with oxidants. 

Occupational exposure limits
TLV not established.
MAK (not established):. 

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol or vapour and by ingestion. 

Inhalation risk
No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20°C. 

Effects of short-term exposure
The substance is irritating to the eyes and skin. The substance may cause effects on the central nervous system. 

Effects of long-term or repeated exposure
The substance may have effects on the liver and kidneys. See Notes. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 180-182°C
Melting point: -75°C
Relative density (water = 1): 0.86
Solubility in water: none
Vapour pressure, kPa at 20°C: 0.13
Relative vapour density (air = 1): 4.6
Flash point: 56°C c.c.
Auto-ignition temperature: 395°C
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.0
Octanol/water partition coefficient as log Pow: 4-4.6 (estimated) 
The substance is very toxic to aquatic organisms. It is strongly advised not to let the chemical enter into the environment. 

NOTES
Diethylbenzene (DEB) is commercialy only available as a mixture of isomers: 1,2 DEB (CAS 135-01-3), 1,3 DEB (CAS 141-93-5) and 1,4 DEB (CAS 105-05-5), with a typical purity > 92.3% (v/v).
The characteristic isomer distribution is : 1,3 DEB (60-65%), 1,4 DEB (27-30%) and 1,2 DEB (4-5%)
The physico-chemical properties may vary according to the chemical composition.
The preventive measures for the individual components may be different than for the mixed isomers.
Effects on kidney and liver have been reported only for the 1,4-isomer. 

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
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    See Also:
       Toxicological Abbreviations