4,5-Dihydro-1H-pyrazole

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Section II.Composition and Information on Ingredients
Chemical NameCAS Number Percent (%)TLV/PELToxicology Data
2-Pyrazoline109-98-8----- Not available.Not available.

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Section III. Hazards Identification
Acute Health EffectsNo specific information is available in our data base regarding the toxic effects of this material for humans. However,
exposure to any chemical should be kept to a minimum. Skin and eye contact may result in irritation. May be harmful if
inhaled or ingested. Always follow safe industrial hygiene practices and wear proper protective equipment when handling
this compound.
CARCINOGENIC EFFECTS : Not available.
Chronic Health Effects
MUTAGENIC EFFECTS : Not available.
TERATOGENIC EFFECTS : Not available.
Toxicity to the reproductive system: Not available.
There is no known effect from chronic exposure to this product. 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. DO NOT use an eye ointment. Flush eyes with running water for a minimum
of 15 minutes, occasionally lifting the upper and lower eyelids. Seek medical attention. Treat symptomatically and
supportively.
Skin Contact
If the chemical gets spilled on a clothed portion of the body, remove the contaminated clothes as quickly as possible,
protecting your own hands and body. Place the victim under a deluge shower. If the chemical touches the victim's
exposed skin, such as the hands: Gently and thoroughly wash the contaminated skin with running water and non-abrasive
soap. Be particularly careful to clean folds, crevices, creases and groin. Cover the irritated skin with an emollient. Seek
medical attention. Treat symptomatically and supportively. Wash any contaminated clothing before reusing.
InhalationIf the victim is not breathing, perform artificial respiration. Loosen tight clothing such as a collar, tie, belt or waistband. If
breathing is difficult, oxygen can be administered. Seek medical attention. Treat symptomatically and supportively.
IngestionRemove dentures if any. Have conscious person drink several glasses of water or milk. INDUCE VOMITING by sticking
finger in throat. Lower the head so that the vomit will not reenter the mouth and throat. NEVER give an unconscious
person anything to ingest. Seek medical attention. Treat symptomatically and supportively.

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Section V. Fire and Explosion Data
Not available.
FlammabilityCombustible.Auto-Ignition
Flammable Limits
Flash PointsNot available.
Not available.
Combustion ProductsThese products are toxic carbon oxides (CO, CO 2), nitrogen oxides (NO, NO2).
Fire Hazards
No specific information is available regarding the flammability of this compound in the presence of various materials.
Explosion HazardsRisks of explosion of the product in presence of mechanical impact: Not available.
Risks of explosion of the product in presence of static discharge: Not available.
No additional information is available regarding the risks of explosion.
Fire Fighting Media
SMALL FIRE: Use DRY chemicals, CO 2, water spray or foam.
and InstructionsLARGE FIRE: Use water spray, fog or foam. DO NOT use water jet.
Continued on Next Page
109-98-8erra

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Section VI.Accidental Release Measures
Spill CleanupCombustible material.
InstructionsKeep away from heat and sources of ignition. Mechanical exhaust required. Stop leak if without risk. Absorb with an
inert material and put the spilled material in an appropriate waste disposal. Finish cleaning the spill by rinsing any
contaminated surfaces with copious amounts of water.

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Section VII. Handling and Storage
Handling and StorageKeep away from heat and sources of ignition. 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 gas, fumes, vapor or spray. In case of
Information
insufficient ventilation, wear suitable respiratory equipment. If you feel unwell, seek medical attention and show the label
when possible. Treat symptomatically and supportively. Avoid contact with skin and eyes.
Always store away from incompatible compounds such as oxidizing agents.

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Section VIII. Exposure Controls/Personal Protection
Engineering ControlsProvide exhaust ventilation or other engineering controls to keep the airborne concentrations of vapors below their
respective threshold limit value. Ensure that eyewash station and safety shower is proximal to the work-station location.
Personal ProtectionSplash goggles. Lab coat. Vapor respirator. Boots. Gloves. A MSHA/NIOSH approved respirator must be used to avoid
inhalation of the product. Suggested protective clothing might not be sufficient; consult a specialist BEFORE handling
this product.
Exposure LimitsNot available.

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Section IX. Physical and Chemical Properties
Liquid.Solubility
Physical state @ 20°CNot available.
1.02
Specific Gravity
Molecular Weight70.09Partition CoefficientNot available.
Boiling Point
144°C (291.2°F)Vapor PressureNot available.
Melting PointNot available.Vapor DensityNot available.
Refractive IndexNot available.VolatilityNot available.
Critical TemperatureNot available.OdorNot available.
ViscosityNot available.TasteNot available.

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Section X.Stability and Reactivity Data
Stability

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This material is stable if stored under proper conditions. (See Section VII for instructions)
Conditions of InstabilityAvoid excessive heat and light.
Incompatibilities
Slightly reactive to reactive with oxidizing agents.

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Section XI. Toxicological Information
RTECS NumberNot available.
Ingestion. Inhalation.
Routes of Exposure
Toxicity DataNot available.
No additional remark.
CARCINOGENIC EFFECTS : Not available.
Chronic Toxic Effects
MUTAGENIC EFFECTS : Not available.
TERATOGENIC EFFECTS : Not available.
Toxicity to the reproductive system: Not available.
There is no known effect from chronic exposure to this product. Repeated or prolonged exposure to this compound is not
known to aggravate existing medical conditions.
Acute Toxic EffectsNo specific information is available in our data base regarding the toxic effects of this material for humans. However,
exposure to any chemical should be kept to a minimum. Skin and eye contact may result in irritation. May be harmful if
inhaled or ingested. Always follow safe industrial hygiene practices and wear proper protective equipment when handling
this compound.
Continued on Next Page
2-Pyrazoline

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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 or regional authorities. You may be able to dissolve or mix material with
Waste Disposal
a 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 this substance.

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Section XIV. Transport Information
DOT ClassificationNot a DOT controlled material (United States).
PIN NumberNONE
Proper Shipping Name
NONE
Packing Group (PG)NONE
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 controlled under WHMIS (Canada).
(Canada)
EINECS Number (EEC) Not available.
EEC Risk StatementsNot controlled under DSCL (Europe).

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SECTION 16 - ADDITIONAL INFORMATION
N/A