ICSC 1674 - ACENAPHTHENE

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ACENAPHTHENE

ICSC: 1674
_{October 2006}

1,2-Dihydroacenaphthylene
1,8-Ethylenenaphthalene

CAS No: 83-32-9
RTECS No: AB1000000
UN No: 3077

C₁₂H₁₀
Molecular mass: 154.2

TYPES OF HAZARD / EXPOSURE	ACUTE HAZARDS / SYMPTOMS	PREVENTION	FIRST AID / FIRE FIGHTING
FIRE	Combustible.	NO open flames.	Water spray. Dry powder. Foam. Carbon dioxide.
EXPLOSION	Finely dispersed particles form explosive mixtures in air.	Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.

EXPOSURE	See NOTES.	PREVENT DISPERSION OF DUST!
Inhalation		Local exhaust or breathing protection.	Fresh air, rest.
Skin		Protective gloves.	Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes		Safety goggles	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion		Do not eat, drink, or smoke during work.	Rinse mouth.

SPILLAGE DISPOSAL	PACKAGING & LABELLING
Personal protection: P2 filter respirator for harmful particles. Do NOT let this chemical enter the environment. Sweep spilled substance into covered containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place.	UN classification UN Hazard Class: 9 UN Pack Group: III GHS classification Signal: Warning Enviro Very toxic to aquatic life with long lasting effects

EMERGENCY RESPONSE	SAFE STORAGE
Transport Emergency Card: TEC (R)-90GM7-III	Separated from strong oxidants. Provision to contain effluent from fire extinguishing. Store in an area without drain or sewer access.

IMPORTANT DATA
Physical State; Appearance WHITE TO BEIGE CRYSTALS Physical dangers Dust explosion possible if in powder or granular form, mixed with air. Chemical dangers On combustion, forms toxic gases including carbon monoxide. Reacts with strong 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, through the skin and by ingestion. Inhalation risk A harmful concentration of airborne particles can be reached quickly when dispersed. Effects of long-term or repeated exposure See Notes.

PHYSICAL PROPERTIES	ENVIRONMENTAL DATA
Boiling point: 279°C Melting point: 95°C Density: 1.2 g/cm³ Solubility in water, g/100 ml at 25°C: 0.0004 Vapour pressure, Pa at 25°C: 0.3 Relative vapour density (air = 1): 5.3 Flash point: 135°C o.c. Auto-ignition temperature: >450 °C Octanol/water partition coefficient as log Pow: 3.9 - 4.5	The substance is very toxic to aquatic organisms. The substance may cause long-term effects in the aquatic environment. It is strongly advised that this substance does not enter the environment.

NOTES

Acenaphthene occurs as a pure substance and also as a component of polyaromatic hydrocarbon (PAH) mixtures. Human population studies have associated PAH's exposure with cancer and cardiovascular diseases.
Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken.

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2006

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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.

Updated by AS. Approved by GS. Last update: 29.01.2008