MSDS Name:Acenaphthene
Synonym:1,8-Ethylenenaphthalene; Acenaphthylene, 1,2-dihydro-; Naphthyleneethylene; Periethylenenaphthalen

EMERGENCY OVERVIEW
Irritating to eyes and skin.The toxicological properties of this material have not been fully investigated.
Potential Health Effects
Eye:
Causes eye irritation.
Skin:
Causes skin irritation.
Ingestion:
May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated. May cause acute vomiting if swallow in large quantities.
Inhalation:
The toxicological properties of this substance have not been fully investigated. Causes upper respiratory tract irritation. Causes irritation of the mucous membrane.
Chronic:
No information found.

Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Skin:
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion:
If victim is conscious and alert, give 2-4 cupfuls of milk or water.
Never give anything by mouth to an unconscious person. Get medical aid.
Inhalation:
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Get medical aid.
Notes to Physician:

General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.
Extinguishing Media:
Use extinguishing media most appropriate for the surrounding fire.
Use water spray, dry chemical, carbon dioxide, or chemical foam.

General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, observing precautions in the Protective Equipment section. Avoid generating dusty conditions.
Provide ventilation.

Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Minimize dust generation and accumulation. Avoid breathing dust, vapor, mist, or gas. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Use with adequate ventilation.
Storage:
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

Engineering Controls:
Use process enclosure, local exhaust ventilation, or other engineering controls to control airborne levels below recommended exposure limits. Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower.
Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHAs eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
A respiratory protection program that meets OSHAs 29 CFR ??1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirators use.

Physical State: Needles
Appearance: pale yellow
Odor: Not available.
pH: Not available.
Vapor Pressure: 10 mm Hg @ 131 C
Viscosity: Not available.
Boiling Point: 279 deg C
Freezing/Melting Point: 93-95 C
Autoignition Temperature: Not applicable.
Flash Point: 125 deg C ( 257.00 deg F)
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature: Not available.
Solubility in water: Insoluble.
Specific Gravity/Density: 1.0690
Molecular Formula: C12H10
Molecular Weight: 154.07

Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
Incompatible materials, dust generation, excess heat.
Incompatibilities with Other Materials:
Strong oxidizing agents.
Hazardous Decomposition Products:
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.
Hazardous Polymerization: Will not occur.

RTECS#:
CAS# 83-32-9: AB1000000 LD50/LC50:
Not available.
Carcinogenicity:
Acenaphthene - Not listed by ACGIH, IARC, NIOSH, NTP, or OSHA.
Other:
See actual entry in RTECS for complete information.

Fish: Fathead Minnow: LC50 =1.6 mg/L; 96 Hr; Flow-through at 22.9C (pH 7.5-7.6)Fish: Rainbow trout: LC50 =0.67 mg/L; 96 Hr; Flow-through at 12.0C (pH 7.2-7.4)Fish: Bluegill/Sunfish: LC50 =1.7 mg/L; 96 Hr; Static bioassayWater flea Daphnia: EC50 =41.2 mg/L; 48 Hr; UnspecifiedBacteria: Phytobacterium phosphoreum: EC50 =0.58-0.93 mg/L; 15 min; Microtox test at 15CAcenaphthene is not expected to undergo hydrolysis or bioconcentrate in envionmental waters. It is degraded by microbes and is readily metabolized by multicellular organisms. Bioaccumulation, (BCF value = 387) especially in vertebrate organisms, is considered to be short-term and is not

Products which are considered hazardous for supply are classified as Special Waste and the disposal of such chemicals is covered by regulations which may vary according to location. Contact a specialist disposal company or the local waste regulator for advice. Empty containers must be decontaminated before returning for recycling.

IATA
Not regulated as a hazardous material.
IMO
Not regulated as a hazardous material.
RID/ADR
Not regulated as a hazardous material.

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: XI
Risk Phrases:
R 36/38 Irritating to eyes and skin.
Safety Phrases:
S 37/39 Wear suitable gloves and eye/face
protection.
WGK (Water Danger/Protection)
CAS# 83-32-9: No information available.
United Kingdom Occupational Exposure Limits

Canada
CAS# 83-32-9 is listed on Canadas DSL List.
CAS# 83-32-9 is listed on Canadas Ingredient Disclosure List.
Exposure Limits
CAS# 83-32-9: OEL-RUSSIA:STEL 10 mg/m3
US FEDERAL
TSCA
CAS# 83-32-9 is listed on the TSCA inventory.