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1-METHYLNAPHTHALENEICSC: 1275
September 1997
CAS #: 90-12-0alpha-Methylnaphthalene
alpha-Methylnaftalen
EINECS #: 201-966-8

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible.  Above 82°C explosive vapour/air mixtures may be formed.  NO open flames.  Above 82°C use a closed system and ventilation.  Use powder, foam, carbon dioxide.   

   
  SYMPTOMS ACUTE HAZARDS FIRST AID
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 CLASSIFICATION & 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. 

According to UN GHS Criteria

 

Transportation
UN Classification
 

STORAGE
Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing. 
PACKAGING
Marine pollutant. 
1-METHYLNAPHTHALENE ICSC: 1275
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID. 

Physical dangers
 

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

Formula: C11H10
Molecular mass: 142.2
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  


EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is irritating to the eyes. 

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


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

ENVIRONMENT
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. 

ADDITIONAL INFORMATION
  EC Classification
 

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    See Also:
       Toxicological Abbreviations
       1-METHYLNAPHTHALENE (JECFA Evaluation)