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Section II.Composition and Information on Ingredients
Chemical NameCAS Number Percent (%)TLV/PELToxicology Data
1,5-Dimethylnaphthalene571-61-9Min. 99.0(GC) Not available.Not available.

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Section III. Hazards Identification
Acute Health EffectsIrritating to eyes and skin on contact. Inhalation causes irritation of the lungs and respiratory system. Inflammation of the
eye is characterized by redness, watering, and itching. Skin inflammation is characterized by itching, scaling, reddening,
or, occasionally, blistering. Follow safe industrial hygiene practices and always wear proper protective equipment when
handling this compound.
CARCINOGENIC EFFECTS : Not available.
Chronic Health Effects
MUTAGENIC EFFECTS : Not available.
TERATOGENIC EFFECTS : Not available.
DEVELOPMENTAL TOXICITY: Not available.
Repeated or prolonged exposure to this compound is not known to aggravate existing medical conditions.

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Section IV.First Aid Measures
Eye ContactCheck for and remove any contact lenses. In case of contact, immediately flush eyes with plenty of water for at least 15
minutes. Get medical attention.
Skin ContactIn case of contact, immediately flush skin with plenty of water. Remove contaminated clothing and shoes. Wash clothing
before reuse. Thoroughly clean shoes before reuse. Get medical attention.
InhalationIf the victim is not breathing, perform mouth-to-mouth resuscitation. Loosen tight clothing such as a collar, tie, belt or
waistband. If breathing is difficult, oxygen can be administered. Seek medical attention if respiration problems do not
improve.
IngestionINDUCE VOMITING by sticking finger in throat. Lower the head so that the vomit will not reenter the mouth and throat.
Loosen tight clothing such as a collar, tie, belt or waistband. If the victim is not breathing, perform mouth-to-mouth
resuscitation. Examine the lips and mouth to ascertain whether the tissues are damaged, a possible indication that the
toxic material was ingested; the absence of such signs, however, is not conclusive.

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Section V.Fire and Explosion Data
Auto-IgnitionNot available.
FlammabilityMay be combustible at high temperature.
Flammable Limits
Flash PointsNot available.
Not available.
Combustion ProductsThese products are toxic carbon oxides (CO, CO 2).
Fire Hazards
Not available.
Risks of explosion of the product in presence of mechanical impact: Not available.
Explosion Hazards
Risks of explosion of the product in presence of static discharge: Not available.
Fire Fighting Media
SMALL FIRE: Use DRY chemical powder.
and InstructionsLARGE FIRE: Use water spray, fog or foam. DO NOT use water jet.
Consult with local fire authorities before attempting large scale fire-fighting operations.
Continued on Next Page
1,5-Dimethylnaphthalene

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Section VI.Accidental Release Measures
Spill CleanupIrritating material.
InstructionsUse a shovel to put the material into a convenient waste disposal container. Finish cleaning the spill by rinsing any
contaminated surfaces with copious amounts of water. Consult federal, state, and/or local authorities for assistance on
disposal.

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Section VII. Handling and Storage
Handling and StorageIRRITANT. Keep away from heat. Mechanical exhaust required. When not in use, tightly seal the container and store in
a dry, cool place. Avoid excessive heat and light. Do not breathe dust.
Information
Always store away from incompatible compounds such as oxidizing agents.

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Section VIII. Exposure Controls/Personal Protection
Engineering ControlsUse process enclosures, local exhaust ventilation, or other engineering controls to keep airborne levels below
recommended exposure limits. If user operations generate dust, fume or mist, use ventilation to keep exposure to
airborne contaminants below the exposure limit.
Personal ProtectionSplash goggles. Lab coat. Dust respirator. Boots. Gloves. Suggested protective clothing might not be sufficient; consult
a specialist BEFORE handling this product. Be sure to use a MSHA/NIOSH approved respirator or equivalent.
Exposure LimitsNot available.

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Section IX. Physical and Chemical Properties
Solubility
Physical state @ 20°CSolid. (White crystalline powder.)Not available.
Not available.
Specific Gravity
Molecular Weight156.23Partition CoefficientNot available.
Boiling Point265 to 266°C (509 to 510.8°F)Vapor PressureNot applicable.
Melting Point80 to 82°C (176 to 179.6°F)Vapor DensityNot available.
Not available.VolatilityNot available.
Refractive Index
Critical TemperatureOdorNot available.
Not available.
Not available.Not available.
ViscosityTaste

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Section X.Stability and Reactivity Data

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This material is stable if stored under proper conditions. (See Section VII for instructions)
Stability
Conditions of Instability
Avoid excessive heat and light.
Incompatibilities
Reactive with strong oxidizing agents.

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Section XI. Toxicological Information
RTECS NumberNot available.
Routes of ExposureEye Contact. Ingestion. Inhalation.
Not available.
Toxicity Data
Chronic Toxic EffectsCARCINOGENIC EFFECTS : Not available.
MUTAGENIC EFFECTS : Not available.
TERATOGENIC EFFECTS : Not available.
DEVELOPMENTAL TOXICITY: Not available.
Repeated or prolonged exposure to this compound is not known to aggravate existing medical conditions.
Irritating to eyes and skin on contact. Inhalation causes irritation of the lungs and respiratory system. Inflammation of the
Acute Toxic Effects
eye is characterized by redness, watering, and itching. Skin inflammation is characterized by itching, scaling, reddening,
or, occasionally, blistering. Follow safe industrial hygiene practices and always wear proper protective equipment when
handling this compound.
Continued on Next Page
1,5-Dimethylnaphthalene

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Section XII.Ecological Information
EcotoxicityNot available.
Environmental FateNot available.

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Section XIII. Disposal Considerations
Recycle to process, if possible. Consult your local regional authorities. You may be able to dissolve or mix material with a
Waste Disposal
combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber system. Observe all
federal, state and local regulations when disposing of the substance.

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Section XIV. Transport Information
DOT ClassificationNot a DOT controlled material (United States).
PIN NumberNot applicable.
Proper Shipping Name
Not applicable.
Packing Group (PG)Not applicable.
DOT Pictograms

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Section XV. Other Regulatory Information and Pictograms
TSCA Chemical InventoryThis product is NOT on the EPA Toxic Substances Control Act (TSCA) inventory. The following notices are required by 40
CFR 720.36 (C) for those products not on the inventory list:
(EPA)
(i) These products are supplied solely for use in research and development by or under the supervision of a technically
qualified individual as defined in 40 CFR 720.0 et sec.
(ii) The health risks of these products have not been fully determined. Any information that is or becomes available will be
supplied on an MSDS sheet.
WHMIS ClassificationNot available.
(Canada)
EINECS Number (EEC) 209-338-5
EEC Risk StatementsR36/37/38- Irritating to eyes, respiratory system and skin.

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SECTION 16 - ADDITIONAL INFORMATION
N/A