IPCS INCHEM Home
CUMENE
ICSC: 0170
Peer-Review Status: 11.04.2014 Validated
(1-Methylethyl)benzene
2-Phenylpropane
Isopropylbenzene
CAS #: 98-82-8 RTECS #: GR8575000
UN #: 1918
EC #: 601-024-00-X
EINECS #: 202-704-5
    Formula: C9H12 / C6H5CH(CH3)2
Molecular mass: 120.2

TYPES OF HAZARD
/ EXPOSURE
ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE-FIGHTING
FIRE Flammable.  NO open flames, NO sparks and NO smoking.  Use powder, AFFF, foam, carbon dioxide. 
EXPLOSION Above 31°C explosive vapour/air mixtures may be formed.  Above 31°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   AVOID ALL CONTACT!   
Inhalation Dizziness. Incoordination. Drowsiness. Headache.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Dry skin.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness.  Wear safety spectacles.  Rinse with plenty of water (remove contact lenses if easily possible). 
Ingestion See Inhalation. Aspiration hazard!  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Refer immediately for medical attention. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: chemical protection suit and filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. 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 let this chemical enter the environment.  Marine pollutant. 
EC Classification
Symbol: Xn, N; R: 10-37-51/53-65; S: (2)-24-37-61-62; Note: C 
UN Classification
UN Hazard Class: 3; UN Pack Group: III 
GHS Classification
Signal: Danger
Flammable liquid and vapour
Harmful if swallowed
Suspected of causing cancer
May be fatal if swallowed and enters airways
Very toxic to aquatic life 
flam;flamecancer;health hazexcl mark;warnenviro;aqua

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H2; F3; R1.  Fireproof. Separated from strong oxidants and acids. Cool. Keep in the dark. Store only if stabilized. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing. 

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
Reacts violently with acids and strong oxidants. This generates fire and explosion hazard. The substance can form explosive peroxides. 

Occupational exposure limits
TLV: 50ppm as TWA; (ACGIH 2014).
MAK: 10 ppm, 50 mg/m³; Carcinogen category: 3B; Peak limitation category: II(4); Pregnancy risk group: C; Skin absorption (H); BAT issued; (DFG 2014). 

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
If swallowed the substance easily enters the airways and could result in aspiration pneumonitis. The substance may cause effects on the central nervous system. Exposure far above the OEL could cause unconsciousness. 

Effects of long-term or repeated exposure
Repeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the liver and upper respiratory tract. This substance is possibly carcinogenic to humans. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 152°C
Melting point: -96°C
Relative density (water = 1): 0.90
Solubility in water, g/l at 20°C: 0.2 (very poor)
Vapour pressure, Pa at 20°C: 427
Relative vapour density (air = 1): 4.2
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.01
Flash point: 31°C c.c.
Auto-ignition temperature: 420°C
Explosive limits, vol% in air: 0.9-6.5
Octanol/water partition coefficient as log Pow: 3.66
Viscosity: 0.85 mm²/s at 25°C 
The substance is very toxic to aquatic organisms. It is strongly advised not to let the chemical enter into the environment. 

NOTES
Check for peroxides prior to distillation; eliminate if found.
Do NOT take working clothes home. 

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
       Cumene (CICADS 18, 1999)