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Chemical Name: 1-Penten-3-One
Synonyms: Pent-1-en-3-one, α,β-Unsaturated methyl ketone
CAS Number: 1629-58-9
Recommended Uses: Chemical intermediate, laboratory reagent, used in organic synthesis
Manufacturer Information: Supplier contact details available on request; emergency contact number provided on label.
Product Code: Specific to distributor or supplier
Classification (GHS): Flammable liquid (Category 3), Acute toxicity (Category 4, Oral), Skin irritation (Category 2), Eye irritation (Category 2A), Acute aquatic toxicity (Category 3).
Hazard Statements: Causes serious eye irritation, causes skin irritation, harmful if swallowed, flammable liquid and vapor.
Signal Word: Warning
Pictograms: Flame, exclamation mark
Precautionary Statements: Avoid breathing vapors. Wear protective gloves and eye protection. Keep away from heat/sparks/open flames/hot surfaces. Store in a well-ventilated area.
Chemical Identity: 1-Penten-3-One
Formula: C5H8O
Concentration: 100% (pure substance)
Impurities and Stabilizers: No significant impurities expected under normal product use.
EC Number: 216-375-6
Inhalation: Move affected person to fresh air. If not breathing, provide artificial respiration. Seek medical attention for breathing difficulties or persistent symptoms.
Skin Contact: Immediately remove contaminated clothing. Wash with soap and plenty of water. Seek medical advice if irritation persists.
Eye Contact: Rinse cautiously with water for several minutes, removing contact lenses if present. Get medical assistance if irritation continues.
Ingestion: Rinse mouth, drink water if conscious. Do not induce vomiting. Call poison control center or seek medical advice immediately.
Suitable Extinguishing Media: Use dry chemical, carbon dioxide, alcohol-resistant foam, or water spray.
Unsuitable Media: Avoid using water jets which may spread fire.
Special Hazards: Vapors may form explosive mixtures with air. Combustion releases carbon monoxide, carbon dioxide, and potentially toxic fumes. Vapor is heavier than air and may travel to a source of ignition and flash back.
Precautions for Firefighters: Wear self-contained breathing apparatus and protective clothing. Prevent runoff from entering drains, sewers, and water supplies.
Personal Precautions: Evacuate area, ventilate, eliminate all ignition sources, use non-sparking tools. Wear gloves, goggles, and protective clothing.
Environmental Precautions: Prevent entry into waterways, drains, soil. Alert authorities if significant environmental contamination occurs.
Spill Clean-up Methods: Absorb liquid with inert material such as sand or diatomaceous earth. Shovel into suitable, labeled container for disposal. Clean spill area with water and detergent, ventilate well.
Handling: Work in well-ventilated area, avoid breathing vapors. Use spark-proof tools and explosion-proof equipment. Prevent skin and eye contact. Keep containers closed except during use.
Storage: Store away from heat sources, open flame, and direct sunlight. Keep in original container or in containers compatible with organic compounds. Store in a cool, dry, well-ventilated area away from oxidizers and acids. Ground and bond containers when transferring contents.
Occupational Exposure Limits: No specific limits established, but general exposure guidance suggests minimizing inhalation and skin contact.
Engineering Controls: Use local exhaust ventilation to reduce airborne concentrations. Keep eyewash station and safety shower readily accessible.
Personal Protective Equipment (PPE): Wear chemical-resistant gloves (nitrile recommended), safety goggles, face shield for large quantities, lab coat or apron, and closed-toe shoes. Use appropriate respiratory protection if exposure limits are exceeded or ventilation is inadequate.
Appearance: Clear colorless to pale yellow liquid
Odor: Sharp, penetrating odor reminiscent of ketones
Odor Threshold: Not data available
pH: Not applicable (neutral organic)
Melting Point/Freezing Point: -85 °C
Boiling Point/Range: 101-103 °C
Flash Point: 20 °C (closed cup)
Evaporation Rate: Not determined precisely; similar to pentanones
Flammability (Solid, Gas): Flammable liquid
Upper/Lower Flammability or Explosive Limits: 1.6%–9.7% (by volume in air, estimated)
Vapor Pressure: 48 mmHg at 25 °C
Vapor Density: 2.6 (air = 1)
Relative Density: 0.83 g/cm³ at 20 °C
Solubility in Water: Slightly soluble
Partition Coefficient (n-octanol/water): 0.55
Auto-Ignition Temperature: 225 °C
Decomposition Temperature: No specific data; avoid heating above flash point
Viscosity: Not readily available
Chemical Stability: Stable under recommended handling and storage conditions.
Possibility of Hazardous Reactions: May react vigorously with oxidizing agents. Vapors can form explosive mixtures with air.
Conditions to Avoid: Heat, sparks, open flame, electrostatic discharge, contact with incompatible chemicals.
Incompatible Materials: Strong oxidizing agents, strong acids, halogens.
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, potentially irritating vapors and other hazardous gases.
Likely Routes of Exposure: Inhalation, ingestion, skin, and eye contact.
Acute Toxicity: Toxic if ingested or inhaled in significant amounts. Oral LD50 (rat): estimated 340 mg/kg; inhalation LC50 (rat): not determined.
Skin Corrosion/Irritation: May cause moderate to severe irritation on contact.
Eye Damage/Irritation: Serious eye irritation reported with direct exposure.
Respiratory Sensitization: Vapor may irritate respiratory tract.
Mutagenicity, Carcinogenicity, Reproductive Toxicity: No specific data; use caution due to general class effects of related α,β-unsaturated ketones.
Chronic Effects: Prolonged exposure may cause dermatitis or central nervous system effects.
Ecotoxicity: Harmful to aquatic organisms at higher concentrations. Data shows moderate toxicity to fish, invertebrates, and algae.
Persistence and Degradability: Biodegradable but may persist long enough in the environment to pose a risk.
Bioaccumulative Potential: Low to moderate, due to log Kow (0.55).
Mobility in Soil: Moderately mobile, may leach to groundwater in large spills.
Other Adverse Effects: Avoid release to the environment. Inform local authorities in case of significant spillage.
Disposal Methods: Follow local, regional, and national regulations for hazardous waste. Incineration in approved facility recommended. Do not pour into drains or watercourses.
Contaminated Packaging: Triple rinse and offer drums for recycling or reconditioning. Dispose of empty containers as hazardous waste.
Waste Codes: Applicable waste codes may be assigned based on local and federal environmental regulations.
UN Number: 1993
UN Proper Shipping Name: Flammable liquid, n.o.s. (contains 1-Penten-3-One)
Transport Hazard Class: 3 (Flammable Liquid)
Packing Group: III
Label: Flammable liquid
Environmental Hazards: Not marine pollutant as per IMDG, but avoid transport in bulk if the material is subject to MARPOL requirements.
Special Precautions for User: Ensure proper grounding of containers during shipment. Emergency information sheet required.
U.S. TSCA Inventory: Listed
OSHA: Classified as hazardous chemical
EPCRA and CERCLA: Not listed for specific reporting thresholds, but local requirements may apply
REACH (EU): Registered or pre-registered; subject to restrictions for workplace use and environmental protection
California Proposition 65: No known components listed
Workplace Hazard Labelling: GHS-compliant pictograms and precautionary language mandatory
Other Regulation: Ensure workplace safety training, and follow applicable hazard communications standards for your jurisdiction.
