alpha-Methylnaphthalene
alpha-Methylnaftalen
C11H10
Molecular mass: 142.2
ICSC # 1275
CAS # 90-12-0
RTECS # QJ9630000
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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
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foam
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carbon dioxide
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Explosion
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Above 82°C explosive vapour/air mixtures may be formed.
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Above 82°C use a closed system, ventilation.
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Exposure
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•Inhalation
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Ventilation.
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Fresh air, rest.
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•Skin
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Redness.
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Protective gloves.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
Pain.
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Safety goggles.
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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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Do not eat, drink, or smoke during work.
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Give a slurry of activated charcoal in water to drink.
Rest.
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.
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Provision to contain effluent from fire extinguishing.
Store in an area without drain or sewer access.
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Marine pollutant.
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Important Data
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Physical State; Appearance:
COLOURLESS LIQUID
Physical Dangers:
Chemical Dangers:
The substance decomposes
on heating
producing acrid smoke and irritating fumes.
Occupational Exposure Limits:
TLV: 0.5 ppm as TWA; (skin); A4 (not classifiable as a human carcinogen); (ACGIH 2008).
MAK not established.
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of its vapour,
by inhalation of its aerosol and
by ingestion.
Inhalation Risk:
No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20°C.
Effects of Short-Term Exposure:
The substance
irritates
the eyes.
Effects of Long-Term or Repeated Exposure:
Lungs may be affected by repeated or prolonged exposure.
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Physical
Properties
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Boiling point: 245°C
Melting point: -22°C
Relative density (water = 1): 1.02
Solubility in water, g/100 ml at 25°C: 0.003
Vapour pressure, Pa at °C: 7.2
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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
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Environmental
Data
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The substance is toxic to aquatic organisms.
The substance may cause long-term effects in the aquatic environment.
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N O T E S
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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 Limits,
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ADDITIONAL INFORMATION
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ICSC: 1275
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1-METHYLNAPHTHALENE
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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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