IPCS INCHEM Home
1-METHYLNAPHTHALENE
ICSC: 1275
Peer-Review Status: 10.09.1997 Validated
alpha-Methylnaphthalene
alpha-Methylnaftalen 
CAS #: 90-12-0 RTECS #: QJ9630000
EINECS #: 201-966-8
    Formula: C11H10
Molecular mass: 142.2

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible.  NO open flames.  Use powder, foam, carbon dioxide. 
EXPLOSION Above 82°C explosive vapour/air mixtures may be formed.  Above 82°C use a closed system and ventilation.   
 
EXPOSURE      
Inhalation   Use ventilation.  Fresh air, rest. 
Skin Redness.  Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness. Pain.  Wear safety goggles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion   Do not eat, drink, or smoke during work.  Rinse mouth. Give a slurry of activated charcoal in water to drink. Rest. 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. Then store and dispose of according to local regulations. Do NOT let this chemical enter the environment.  Marine pollutant. 
EC Classification
 
UN Classification
 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
  Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS LIQUID. 

Physical dangers
 

Chemical dangers
Decomposes on heating. This produces acrid smoke and irritating fumes. 

Occupational exposure limits
TLV: 0.5ppm as TWA; (skin); A4 (not classifiable as a human carcinogen); (ACGIH 2008). 

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. 

Effects of long-term or repeated exposure
Repeated or prolonged inhalation may cause effects on the lungs. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 245°C
Melting point: -22°C
Relative density (water = 1): 1.02
Solubility in water, g/100ml at 25°C: 0.003
Vapour pressure, Pa at °C: 7.2
Relative vapour density (air = 1): 4.9
Flash point: 82°C
Auto-ignition temperature: 529°C
Octanol/water partition coefficient as log Pow: 3.87  
The substance is toxic to aquatic organisms. The substance may cause long-term effects in the aquatic environment. 

NOTES
Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken.
Card has been partially updated in February 2009: see Occupational Exposure Limit, Fire fighting, Storage. 

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
       1-METHYLNAPHTHALENE (JECFA Evaluation)